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content=Nicksxs itemprop=name></span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="Nicksxs 的技术博客,深入 Java 运行时与生产诊断、低成本大模型推理和 Agent 工程实践。" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="聊聊 Java 自带的那些*逆天*工具 | Nicksxs's Blog" itemprop=name><meta content="本文介绍 JDK 自带的 jps、jstack、jmap 等诊断工具,演示如何定位 Java 进程、获取线程转储、查看 JVM 参数,并以死锁和线上问题排查为例说明常用命令。" itemprop=description></span><header class=post-header><h1 itemprop="name headline" class=post-title>聊聊 Java 自带的那些*逆天*工具</h1><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间:2020-08-02 21:13:59" datetime=2020-08-02T21:13:59+08:00>2020-08-02</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Java/ itemprop=url rel=index><span itemprop=name>Java</span></a> </span>, <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/%E5%B7%A5%E5%85%B7/ itemprop=url rel=index><span itemprop=name>工具</span></a> </span>, <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Thread-dump/ itemprop=url rel=index><span itemprop=name>Thread dump</span></a> </span>, <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/%E9%97%AE%E9%A2%98%E6%8E%92%E6%9F%A5/ itemprop=url rel=index><span itemprop=name>问题排查</span></a> </span></span><span class="post-meta-item cloudflare-page-counter" data-title="聊聊 Java 自带的那些*逆天*工具" data-increment=true data-path=/2020/08/02/%E8%81%8A%E8%81%8A-Java-%E8%87%AA%E5%B8%A6%E7%9A%84%E9%82%A3%E4%BA%9B%E9%80%86%E5%A4%A9%E5%B7%A5%E5%85%B7/ title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数:</span> <span class=cloudflare-page-counter-count></span></span></div><div class=post-description>本文介绍 JDK 自带的 jps、jstack、jmap 等诊断工具,演示如何定位 Java 进程、获取线程转储、查看 JVM 参数,并以死锁和线上问题排查为例说明常用命令。</div></div></header><div class=post-body itemprop=articleBody><p>原谅我的标题党,其实这些工具的确很厉害,之前其实介绍过一点相关的,是从我一次问题排查的过程中用到的,但是最近又有碰到一次排查问题,发现其实用 idea 直接 <code>dump thread</code> 是不现实的,毕竟服务器环境的没法这么操作,那就得用 Java 的那些工具了<h3 id=jstack-jps><a title="jstack & jps" class=headerlink href=#jstack-jps></a>jstack & jps</h3><p>譬如 <code>jstack</code>,这个命令其实不能更简单了<br>看看 help 信息<br><img loading=lazy src=https://img.nicksxs.me/uPic/1eYvcu.png><br>用<code>-l</code>参数可以打出锁的额外信息,然后后面的 pid 就是进程 id 咯,机智的小伙伴会问了(就你这个小白才问这么蠢的问题🤦♂️),怎么看 Java 应用的进程呢<br>那就是 <code>jps</code> 了,命令也很简单,一般直接用 <code>jps</code>命令就好了,不过也可以 help 看一下<br><img loading=lazy src=https://img.nicksxs.me/uPic/DqWZe1.png><br>稍微解释下,-q是只显示进程 id,-m是输出给main 方法的参数,比如我在配置中加给参数<br><img loading=lazy src=https://img.nicksxs.me/uPic/4A0pqD.png><br>然后用 <code>jps -m</code>查看<br><img loading=lazy src=https://img.nicksxs.me/uPic/LlGPfU.png><br><code>-v</code>加上小 v 的话就是打印 jvm 参数<br><img loading=lazy src=https://img.nicksxs.me/uPic/3UTgsd.png><br>还是有点东西,然后就继续介绍 jstack 了,然后我们看看 jstack 出来是啥,为了加点内容我加了个死锁<figure class="highlight java"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br><span class=line>12</span><br><span class=line>13</span><br><span class=line>14</span><br><span class=line>15</span><br><span class=line>16</span><br><span class=line>17</span><br><span class=line>18</span><br><span class=line>19</span><br><span class=line>20</span><br><span class=line>21</span><br><span class=line>22</span><br><span class=line>23</span><br><span class=line>24</span><br><span class=line>25</span><br><span class=line>26</span><br><span class=line>27</span><br><span class=line>28</span><br><span class=line>29</span><br><span class=line>30</span><br><span class=line>31</span><br><span class=line>32</span><br><span class=line>33</span><br><span class=line>34</span><br></pre><td class=code><pre><span class=line><span class=keyword>public</span> <span class=keyword>static</span> <span class=keyword>void</span> <span class="title function_">main</span><span class=params>(String[] args)</span> <span class=keyword>throws</span> InterruptedException {</span><br><span class=line> SpringApplication.run(ThreadDumpDemoApplication.class, args);</span><br><span class=line> <span class=type>ReentrantLock</span> <span class=variable>lock1</span> <span class=operator>=</span> <span class=keyword>new</span> <span class="title class_">ReentrantLock</span>();</span><br><span class=line> <span class=type>ReentrantLock</span> <span class=variable>lock2</span> <span class=operator>=</span> <span class=keyword>new</span> <span class="title class_">ReentrantLock</span>();</span><br><span class=line> <span class=type>Thread</span> <span class=variable>t1</span> <span class=operator>=</span> <span class=keyword>new</span> <span class="title class_">Thread</span>() {</span><br><span class=line> <span class=meta>@Override</span></span><br><span class=line> <span class=keyword>public</span> <span class=keyword>void</span> <span class="title function_">run</span><span class=params>()</span> {</span><br><span class=line> <span class=keyword>try</span> {</span><br><span class=line> lock1.lock();</span><br><span class=line> TimeUnit.SECONDS.sleep(<span class=number>1</span>);</span><br><span class=line> lock2.lock();</span><br><span class=line> } <span class=keyword>catch</span> (InterruptedException e) {</span><br><span class=line> e.printStackTrace();</span><br><span class=line> }</span><br><span class=line> }</span><br><span class=line> };</span><br><span class=line> <span class=type>Thread</span> <span class=variable>t2</span> <span class=operator>=</span> <span class=keyword>new</span> <span class="title class_">Thread</span>() {</span><br><span class=line> <span class=meta>@Override</span></span><br><span class=line> <span class=keyword>public</span> <span class=keyword>void</span> <span class="title function_">run</span><span class=params>()</span> {</span><br><span class=line> <span class=keyword>try</span> {</span><br><span class=line> lock2.lock();</span><br><span class=line> TimeUnit.SECONDS.sleep(<span class=number>1</span>);</span><br><span class=line> lock1.lock();</span><br><span class=line> } <span class=keyword>catch</span> (InterruptedException e) {</span><br><span class=line> e.printStackTrace();</span><br><span class=line> }</span><br><span class=line> }</span><br><span class=line> };</span><br><span class=line> t1.setName(<span class=string>"mythread1"</span>);</span><br><span class=line> t2.setName(<span class=string>"mythread2"</span>);</span><br><span class=line> t1.start();</span><br><span class=line> t2.start();</span><br><span class=line> Thread.sleep(<span class=number>10000</span>);</span><br><span class=line> }</span><br></pre></table></figure><p>然后看看出来时怎么样的<figure class="highlight java"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br><span class=line>12</span><br><span class=line>13</span><br><span class=line>14</span><br><span class=line>15</span><br><span class=line>16</span><br><span class=line>17</span><br><span class=line>18</span><br><span class=line>19</span><br><span class=line>20</span><br><span class=line>21</span><br><span class=line>22</span><br><span class=line>23</span><br><span class=line>24</span><br><span class=line>25</span><br><span class=line>26</span><br><span class=line>27</span><br><span class=line>28</span><br><span class=line>29</span><br><span class=line>30</span><br><span class=line>31</span><br><span class=line>32</span><br><span class=line>33</span><br><span class=line>34</span><br><span class=line>35</span><br><span class=line>36</span><br><span class=line>37</span><br><span class=line>38</span><br><span class=line>39</span><br><span class=line>40</span><br><span class=line>41</span><br><span class=line>42</span><br><span class=line>43</span><br><span class=line>44</span><br><span class=line>45</span><br><span class=line>46</span><br><span class=line>47</span><br><span class=line>48</span><br><span class=line>49</span><br><span class=line>50</span><br><span class=line>51</span><br><span class=line>52</span><br><span class=line>53</span><br><span class=line>54</span><br><span class=line>55</span><br><span class=line>56</span><br><span class=line>57</span><br><span class=line>58</span><br><span class=line>59</span><br><span class=line>60</span><br><span class=line>61</span><br><span class=line>62</span><br><span class=line>63</span><br><span class=line>64</span><br><span class=line>65</span><br><span class=line>66</span><br><span class=line>67</span><br><span class=line>68</span><br><span class=line>69</span><br><span class=line>70</span><br><span class=line>71</span><br><span class=line>72</span><br><span class=line>73</span><br><span class=line>74</span><br><span class=line>75</span><br><span class=line>76</span><br><span class=line>77</span><br><span class=line>78</span><br><span class=line>79</span><br><span class=line>80</span><br><span class=line>81</span><br><span class=line>82</span><br><span class=line>83</span><br><span class=line>84</span><br><span class=line>85</span><br><span class=line>86</span><br><span class=line>87</span><br><span class=line>88</span><br><span class=line>89</span><br><span class=line>90</span><br><span class=line>91</span><br><span class=line>92</span><br><span class=line>93</span><br><span class=line>94</span><br><span class=line>95</span><br><span class=line>96</span><br><span class=line>97</span><br><span class=line>98</span><br><span class=line>99</span><br><span class=line>100</span><br><span class=line>101</span><br><span class=line>102</span><br><span class=line>103</span><br><span class=line>104</span><br><span class=line>105</span><br><span class=line>106</span><br><span class=line>107</span><br><span class=line>108</span><br><span class=line>109</span><br><span class=line>110</span><br><span class=line>111</span><br><span class=line>112</span><br><span class=line>113</span><br><span class=line>114</span><br><span class=line>115</span><br><span class=line>116</span><br><span class=line>117</span><br><span class=line>118</span><br><span class=line>119</span><br><span class=line>120</span><br><span class=line>121</span><br><span class=line>122</span><br><span class=line>123</span><br><span class=line>124</span><br><span class=line>125</span><br><span class=line>126</span><br><span class=line>127</span><br><span class=line>128</span><br><span class=line>129</span><br><span class=line>130</span><br><span class=line>131</span><br><span class=line>132</span><br><span class=line>133</span><br><span class=line>134</span><br><span class=line>135</span><br><span class=line>136</span><br><span class=line>137</span><br><span class=line>138</span><br><span class=line>139</span><br><span class=line>140</span><br><span class=line>141</span><br><span class=line>142</span><br><span class=line>143</span><br><span class=line>144</span><br><span class=line>145</span><br><span class=line>146</span><br><span class=line>147</span><br><span class=line>148</span><br><span class=line>149</span><br><span class=line>150</span><br><span class=line>151</span><br><span class=line>152</span><br><span class=line>153</span><br><span class=line>154</span><br><span class=line>155</span><br><span class=line>156</span><br><span class=line>157</span><br><span class=line>158</span><br><span class=line>159</span><br><span class=line>160</span><br><span class=line>161</span><br><span class=line>162</span><br><span class=line>163</span><br><span class=line>164</span><br><span class=line>165</span><br><span class=line>166</span><br><span class=line>167</span><br><span class=line>168</span><br><span class=line>169</span><br><span class=line>170</span><br><span class=line>171</span><br><span class=line>172</span><br><span class=line>173</span><br><span class=line>174</span><br><span class=line>175</span><br><span class=line>176</span><br><span class=line>177</span><br><span class=line>178</span><br><span class=line>179</span><br><span class=line>180</span><br><span class=line>181</span><br><span class=line>182</span><br><span class=line>183</span><br><span class=line>184</span><br><span class=line>185</span><br><span class=line>186</span><br><span class=line>187</span><br><span class=line>188</span><br><span class=line>189</span><br><span class=line>190</span><br><span class=line>191</span><br><span class=line>192</span><br><span class=line>193</span><br><span class=line>194</span><br><span class=line>195</span><br><span class=line>196</span><br><span class=line>197</span><br><span class=line>198</span><br><span class=line>199</span><br><span class=line>200</span><br><span class=line>201</span><br><span class=line>202</span><br><span class=line>203</span><br><span class=line>204</span><br><span class=line>205</span><br><span class=line>206</span><br><span class=line>207</span><br><span class=line>208</span><br><span class=line>209</span><br><span class=line>210</span><br><span class=line>211</span><br><span class=line>212</span><br><span class=line>213</span><br><span class=line>214</span><br><span class=line>215</span><br><span class=line>216</span><br><span class=line>217</span><br><span class=line>218</span><br><span class=line>219</span><br><span class=line>220</span><br><span class=line>221</span><br><span class=line>222</span><br><span class=line>223</span><br><span class=line>224</span><br><span class=line>225</span><br><span class=line>226</span><br><span class=line>227</span><br><span class=line>228</span><br><span class=line>229</span><br><span class=line>230</span><br><span class=line>231</span><br><span class=line>232</span><br><span class=line>233</span><br><span class=line>234</span><br><span class=line>235</span><br><span class=line>236</span><br><span class=line>237</span><br><span class=line>238</span><br><span class=line>239</span><br><span class=line>240</span><br><span class=line>241</span><br><span class=line>242</span><br><span class=line>243</span><br><span class=line>244</span><br><span class=line>245</span><br><span class=line>246</span><br><span class=line>247</span><br><span class=line>248</span><br><span class=line>249</span><br><span class=line>250</span><br><span class=line>251</span><br><span class=line>252</span><br><span class=line>253</span><br><span class=line>254</span><br><span class=line>255</span><br><span class=line>256</span><br><span class=line>257</span><br><span class=line>258</span><br><span class=line>259</span><br><span class=line>260</span><br><span class=line>261</span><br><span class=line>262</span><br><span class=line>263</span><br><span class=line>264</span><br><span class=line>265</span><br><span class=line>266</span><br><span class=line>267</span><br><span class=line>268</span><br><span class=line>269</span><br><span class=line>270</span><br><span class=line>271</span><br><span class=line>272</span><br><span class=line>273</span><br><span class=line>274</span><br><span class=line>275</span><br><span class=line>276</span><br><span class=line>277</span><br><span class=line>278</span><br><span class=line>279</span><br><span class=line>280</span><br><span class=line>281</span><br><span class=line>282</span><br><span class=line>283</span><br><span class=line>284</span><br><span class=line>285</span><br><span class=line>286</span><br><span class=line>287</span><br><span class=line>288</span><br><span class=line>289</span><br><span class=line>290</span><br><span class=line>291</span><br><span class=line>292</span><br><span class=line>293</span><br><span class=line>294</span><br><span class=line>295</span><br><span class=line>296</span><br><span class=line>297</span><br><span class=line>298</span><br><span class=line>299</span><br><span class=line>300</span><br><span class=line>301</span><br><span class=line>302</span><br><span class=line>303</span><br><span class=line>304</span><br><span class=line>305</span><br><span class=line>306</span><br><span class=line>307</span><br><span class=line>308</span><br><span class=line>309</span><br><span class=line>310</span><br><span class=line>311</span><br><span class=line>312</span><br><span class=line>313</span><br><span class=line>314</span><br><span class=line>315</span><br><span class=line>316</span><br><span class=line>317</span><br><span class=line>318</span><br><span class=line>319</span><br><span class=line>320</span><br><span class=line>321</span><br><span class=line>322</span><br><span class=line>323</span><br><span class=line>324</span><br><span class=line>325</span><br><span class=line>326</span><br><span class=line>327</span><br><span class=line>328</span><br><span class=line>329</span><br><span class=line>330</span><br><span class=line>331</span><br><span class=line>332</span><br><span class=line>333</span><br><span class=line>334</span><br><span class=line>335</span><br><span class=line>336</span><br><span class=line>337</span><br><span class=line>338</span><br><span class=line>339</span><br><span class=line>340</span><br><span class=line>341</span><br><span class=line>342</span><br><span class=line>343</span><br><span class=line>344</span><br><span class=line>345</span><br><span class=line>346</span><br><span class=line>347</span><br><span class=line>348</span><br><span class=line>349</span><br><span class=line>350</span><br><span class=line>351</span><br><span class=line>352</span><br><span class=line>353</span><br><span class=line>354</span><br><span class=line>355</span><br><span class=line>356</span><br><span class=line>357</span><br><span class=line>358</span><br><span class=line>359</span><br><span class=line>360</span><br><span class=line>361</span><br><span class=line>362</span><br><span class=line>363</span><br><span class=line>364</span><br><span class=line>365</span><br><span class=line>366</span><br><span class=line>367</span><br><span class=line>368</span><br><span class=line>369</span><br><span class=line>370</span><br><span class=line>371</span><br><span class=line>372</span><br><span class=line>373</span><br><span class=line>374</span><br><span class=line>375</span><br><span class=line>376</span><br><span class=line>377</span><br><span class=line>378</span><br><span class=line>379</span><br><span class=line>380</span><br><span class=line>381</span><br><span class=line>382</span><br><span class=line>383</span><br><span class=line>384</span><br><span class=line>385</span><br><span class=line>386</span><br><span class=line>387</span><br><span class=line>388</span><br><span class=line>389</span><br><span class=line>390</span><br><span class=line>391</span><br><span class=line>392</span><br><span class=line>393</span><br><span class=line>394</span><br><span class=line>395</span><br><span class=line>396</span><br><span class=line>397</span><br><span class=line>398</span><br><span class=line>399</span><br><span class=line>400</span><br><span class=line>401</span><br><span class=line>402</span><br><span class=line>403</span><br><span class=line>404</span><br><span class=line>405</span><br><span class=line>406</span><br><span class=line>407</span><br><span class=line>408</span><br><span class=line>409</span><br><span class=line>410</span><br><span class=line>411</span><br><span class=line>412</span><br><span class=line>413</span><br><span class=line>414</span><br><span class=line>415</span><br><span class=line>416</span><br><span class=line>417</span><br><span class=line>418</span><br><span class=line>419</span><br><span class=line>420</span><br><span class=line>421</span><br><span class=line>422</span><br><span class=line>423</span><br><span class=line>424</span><br><span class=line>425</span><br><span class=line>426</span><br><span class=line>427</span><br><span class=line>428</span><br><span class=line>429</span><br><span class=line>430</span><br><span class=line>431</span><br><span class=line>432</span><br><span class=line>433</span><br><span class=line>434</span><br><span class=line>435</span><br><span class=line>436</span><br><span class=line>437</span><br><span class=line>438</span><br><span class=line>439</span><br><span class=line>440</span><br><span class=line>441</span><br><span class=line>442</span><br><span class=line>443</span><br><span class=line>444</span><br><span class=line>445</span><br><span class=line>446</span><br><span class=line>447</span><br><span class=line>448</span><br><span class=line>449</span><br><span class=line>450</span><br><span class=line>451</span><br><span class=line>452</span><br><span class=line>453</span><br><span class=line>454</span><br><span class=line>455</span><br><span class=line>456</span><br><span class=line>457</span><br><span class=line>458</span><br><span class=line>459</span><br><span class=line>460</span><br><span class=line>461</span><br><span class=line>462</span><br><span class=line>463</span><br><span class=line>464</span><br><span class=line>465</span><br></pre><td class=code><pre><span class=line><span class=number>2020</span>-08-<span class=number>02</span> <span class=number>21</span>:<span class=number>50</span>:<span class=number>32</span></span><br><span class=line>Full thread dump Java <span class="title function_">HotSpot</span><span class=params>(TM)</span> <span class=number>64</span>-Bit Server <span class="title function_">VM</span> <span class=params>(<span class=number>25.201</span>-b09 mixed mode)</span>:</span><br><span class=line></span><br><span class=line><span class=string>"DestroyJavaVM"</span> #<span class=number>147</span> prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9dd807000</span> nid=<span class=number>0x2603</span> waiting on condition [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"mythread2"</span> #<span class=number>140</span> prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9dd877000</span> nid=<span class=number>0x9903</span> waiting on condition [<span class=number>0x0000700006fb9000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f5d4330</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:<span class=number>836</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:<span class=number>870</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:<span class=number>1199</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:<span class=number>209</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:<span class=number>285</span>)</span><br><span class=line> at com.nicksxs.thread_dump_demo.ThreadDumpDemoApplication$<span class=number>2.</span>run(ThreadDumpDemoApplication.java:<span class=number>34</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - <<span class=number>0x000000076f5d4360</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line></span><br><span class=line><span class=string>"mythread1"</span> #<span class=number>139</span> prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de873800</span> nid=<span class=number>0x9a03</span> waiting on condition [<span class=number>0x0000700006eb6000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f5d4360</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:<span class=number>836</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:<span class=number>870</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:<span class=number>1199</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:<span class=number>209</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:<span class=number>285</span>)</span><br><span class=line> at com.nicksxs.thread_dump_demo.ThreadDumpDemoApplication$<span class=number>1.</span>run(ThreadDumpDemoApplication.java:<span class=number>22</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - <<span class=number>0x000000076f5d4330</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-Acceptor"</span> #<span class=number>137</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de1ac000</span> nid=<span class=number>0x9b03</span> runnable [<span class=number>0x0000700006db3000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line> at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)</span><br><span class=line> at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:<span class=number>422</span>)</span><br><span class=line> at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:<span class=number>250</span>)</span><br><span class=line> - locked <<span class=number>0x000000076f1e4820</span>> (a java.lang.Object)</span><br><span class=line> at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:<span class=number>469</span>)</span><br><span class=line> at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:<span class=number>71</span>)</span><br><span class=line> at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:<span class=number>95</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-ClientPoller"</span> #<span class=number>136</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9dd876800</span> nid=<span class=number>0x6503</span> runnable [<span class=number>0x0000700006cb0000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)</span><br><span class=line> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:<span class=number>198</span>)</span><br><span class=line> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:<span class=number>117</span>)</span><br><span class=line> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:<span class=number>86</span>)</span><br><span class=line> - locked <<span class=number>0x000000076f2978c8</span>> (a sun.nio.ch.Util$<span class=number>3</span>)</span><br><span class=line> - locked <<span class=number>0x000000076f2978b8</span>> (a java.util.Collections$UnmodifiableSet)</span><br><span class=line> - locked <<span class=number>0x000000076f297798</span>> (a sun.nio.ch.KQueueSelectorImpl)</span><br><span class=line> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:<span class=number>97</span>)</span><br><span class=line> at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:<span class=number>709</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-10"</span> #<span class=number>135</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de1af000</span> nid=<span class=number>0x9d03</span> waiting on condition [<span class=number>0x0000700006bad000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-9"</span> #<span class=number>134</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de1ab800</span> nid=<span class=number>0x6403</span> waiting on condition [<span class=number>0x0000700006aaa000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-8"</span> #<span class=number>133</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de873000</span> nid=<span class=number>0x9f03</span> waiting on condition [<span class=number>0x00007000069a7000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-7"</span> #<span class=number>132</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df0a1800</span> nid=<span class=number>0xa103</span> waiting on condition [<span class=number>0x00007000068a4000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-6"</span> #<span class=number>131</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df242800</span> nid=<span class=number>0x6103</span> waiting on condition [<span class=number>0x00007000067a1000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-5"</span> #<span class=number>130</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de872000</span> nid=<span class=number>0x5f03</span> waiting on condition [<span class=number>0x000070000669e000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-4"</span> #<span class=number>129</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de1a6000</span> nid=<span class=number>0x5e03</span> waiting on condition [<span class=number>0x000070000659b000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-3"</span> #<span class=number>128</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de871800</span> nid=<span class=number>0x5c03</span> waiting on condition [<span class=number>0x0000700006498000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-2"</span> #<span class=number>127</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9dead9000</span> nid=<span class=number>0x5b03</span> waiting on condition [<span class=number>0x0000700006395000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-exec-1"</span> #<span class=number>126</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9ddb00000</span> nid=<span class=number>0x5a03</span> waiting on condition [<span class=number>0x0000700006292000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f26aa00</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:<span class=number>442</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>107</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:<span class=number>33</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"http-nio-8080-BlockPoller"</span> #<span class=number>125</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df242000</span> nid=<span class=number>0xa503</span> runnable [<span class=number>0x000070000618f000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line> at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)</span><br><span class=line> at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:<span class=number>198</span>)</span><br><span class=line> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:<span class=number>117</span>)</span><br><span class=line> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:<span class=number>86</span>)</span><br><span class=line> - locked <<span class=number>0x000000076f1eea30</span>> (a sun.nio.ch.Util$<span class=number>3</span>)</span><br><span class=line> - locked <<span class=number>0x000000076f1ee198</span>> (a java.util.Collections$UnmodifiableSet)</span><br><span class=line> - locked <<span class=number>0x000000076f1ee010</span>> (a sun.nio.ch.KQueueSelectorImpl)</span><br><span class=line> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:<span class=number>97</span>)</span><br><span class=line> at org.apache.tomcat.util.net.NioBlockingSelector$BlockPoller.run(NioBlockingSelector.java:<span class=number>313</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"container-0"</span> #<span class=number>124</span> prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df06a000</span> nid=<span class=number>0x5803</span> waiting on condition [<span class=number>0x000070000608c000</span>]</span><br><span class=line> java.lang.Thread.State: TIMED_WAITING (sleeping)</span><br><span class=line> at java.lang.Thread.sleep(Native Method)</span><br><span class=line> at org.apache.catalina.core.StandardServer.await(StandardServer.java:<span class=number>570</span>)</span><br><span class=line> at org.springframework.boot.web.embedded.tomcat.TomcatWebServer$<span class=number>1.</span>run(TomcatWebServer.java:<span class=number>197</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Catalina-utility-2"</span> #<span class=number>123</span> prio=<span class=number>1</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de886000</span> nid=<span class=number>0xa80f</span> waiting on condition [<span class=number>0x0000700005f89000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076c88ab58</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:<span class=number>2039</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>1088</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>809</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Catalina-utility-1"</span> #<span class=number>122</span> prio=<span class=number>1</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de884000</span> nid=<span class=number>0x5667</span> waiting on condition [<span class=number>0x0000700005e86000</span>]</span><br><span class=line> java.lang.Thread.State: TIMED_WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076c88ab58</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:<span class=number>215</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:<span class=number>2078</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>1093</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>809</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:<span class=number>61</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"RMI Scheduler(0)"</span> #<span class=number>15</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de9ee000</span> nid=<span class=number>0x5503</span> waiting on condition [<span class=number>0x0000700005d83000</span>]</span><br><span class=line> java.lang.Thread.State: TIMED_WAITING (parking)</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x00000006c0015410</span>> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:<span class=number>215</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:<span class=number>2078</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>1093</span>)</span><br><span class=line> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:<span class=number>809</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:<span class=number>1074</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:<span class=number>1134</span>)</span><br><span class=line> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:<span class=number>624</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Attach Listener"</span> #<span class=number>13</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df149800</span> nid=<span class=number>0x3c07</span> waiting on condition [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"RMI TCP Accept-0"</span> #<span class=number>11</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df100000</span> nid=<span class=number>0x4003</span> runnable [<span class=number>0x0000700005977000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line> at java.net.PlainSocketImpl.socketAccept(Native Method)</span><br><span class=line> at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:<span class=number>409</span>)</span><br><span class=line> at java.net.ServerSocket.implAccept(ServerSocket.java:<span class=number>545</span>)</span><br><span class=line> at java.net.ServerSocket.accept(ServerSocket.java:<span class=number>513</span>)</span><br><span class=line> at sun.management.jmxremote.LocalRMIServerSocketFactory$<span class=number>1.</span>accept(LocalRMIServerSocketFactory.java:<span class=number>52</span>)</span><br><span class=line> at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:<span class=number>405</span>)</span><br><span class=line> at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:<span class=number>377</span>)</span><br><span class=line> at java.lang.Thread.run(Thread.java:<span class=number>748</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Service Thread"</span> #<span class=number>9</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df0ce800</span> nid=<span class=number>0x4103</span> runnable [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"C1 CompilerThread2"</span> #<span class=number>8</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df0ce000</span> nid=<span class=number>0x4203</span> waiting on condition [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"C2 CompilerThread1"</span> #<span class=number>7</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de0a3800</span> nid=<span class=number>0x3503</span> waiting on condition [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"C2 CompilerThread0"</span> #<span class=number>6</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de89b000</span> nid=<span class=number>0x3403</span> waiting on condition [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Monitor Ctrl-Break"</span> #<span class=number>5</span> daemon prio=<span class=number>5</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df0ca000</span> nid=<span class=number>0x3303</span> runnable [<span class=number>0x0000700005468000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line> at java.net.SocketInputStream.socketRead0(Native Method)</span><br><span class=line> at java.net.SocketInputStream.socketRead(SocketInputStream.java:<span class=number>116</span>)</span><br><span class=line> at java.net.SocketInputStream.read(SocketInputStream.java:<span class=number>171</span>)</span><br><span class=line> at java.net.SocketInputStream.read(SocketInputStream.java:<span class=number>141</span>)</span><br><span class=line> at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:<span class=number>284</span>)</span><br><span class=line> at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:<span class=number>326</span>)</span><br><span class=line> at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:<span class=number>178</span>)</span><br><span class=line> - locked <<span class=number>0x00000006c001b760</span>> (a java.io.InputStreamReader)</span><br><span class=line> at java.io.InputStreamReader.read(InputStreamReader.java:<span class=number>184</span>)</span><br><span class=line> at java.io.BufferedReader.fill(BufferedReader.java:<span class=number>161</span>)</span><br><span class=line> at java.io.BufferedReader.readLine(BufferedReader.java:<span class=number>324</span>)</span><br><span class=line> - locked <<span class=number>0x00000006c001b760</span>> (a java.io.InputStreamReader)</span><br><span class=line> at java.io.BufferedReader.readLine(BufferedReader.java:<span class=number>389</span>)</span><br><span class=line> at com.intellij.rt.execution.application.AppMainV2$<span class=number>1.</span>run(AppMainV2.java:<span class=number>64</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Signal Dispatcher"</span> #<span class=number>4</span> daemon prio=<span class=number>9</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de824000</span> nid=<span class=number>0x4503</span> runnable [<span class=number>0x0000000000000000</span>]</span><br><span class=line> java.lang.Thread.State: RUNNABLE</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Finalizer"</span> #<span class=number>3</span> daemon prio=<span class=number>8</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9dd811800</span> nid=<span class=number>0x4f03</span> in Object.wait() [<span class=number>0x0000700005262000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (on object monitor)</span><br><span class=line> at java.lang.Object.wait(Native Method)</span><br><span class=line> - waiting on <<span class=number>0x00000006c0008348</span>> (a java.lang.ref.ReferenceQueue$Lock)</span><br><span class=line> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:<span class=number>144</span>)</span><br><span class=line> - locked <<span class=number>0x00000006c0008348</span>> (a java.lang.ref.ReferenceQueue$Lock)</span><br><span class=line> at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:<span class=number>165</span>)</span><br><span class=line> at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:<span class=number>216</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"Reference Handler"</span> #<span class=number>2</span> daemon prio=<span class=number>10</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de02a000</span> nid=<span class=number>0x5003</span> in Object.wait() [<span class=number>0x000070000515f000</span>]</span><br><span class=line> java.lang.Thread.State: WAITING (on object monitor)</span><br><span class=line> at java.lang.Object.wait(Native Method)</span><br><span class=line> - waiting on <<span class=number>0x00000006c001b940</span>> (a java.lang.ref.Reference$Lock)</span><br><span class=line> at java.lang.Object.wait(Object.java:<span class=number>502</span>)</span><br><span class=line> at java.lang.ref.Reference.tryHandlePending(Reference.java:<span class=number>191</span>)</span><br><span class=line> - locked <<span class=number>0x00000006c001b940</span>> (a java.lang.ref.Reference$Lock)</span><br><span class=line> at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:<span class=number>153</span>)</span><br><span class=line></span><br><span class=line> Locked ownable synchronizers:</span><br><span class=line> - None</span><br><span class=line></span><br><span class=line><span class=string>"VM Thread"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df00b800</span> nid=<span class=number>0x2c03</span> runnable </span><br><span class=line></span><br><span class=line><span class=string>"GC task thread#0 (ParallelGC)"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de805000</span> nid=<span class=number>0x1e07</span> runnable </span><br><span class=line></span><br><span class=line><span class=string>"GC task thread#1 (ParallelGC)"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9de003800</span> nid=<span class=number>0x2a03</span> runnable </span><br><span class=line></span><br><span class=line><span class=string>"GC task thread#2 (ParallelGC)"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df002000</span> nid=<span class=number>0x5403</span> runnable </span><br><span class=line></span><br><span class=line><span class=string>"GC task thread#3 (ParallelGC)"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df002800</span> nid=<span class=number>0x5203</span> runnable </span><br><span class=line></span><br><span class=line><span class=string>"VM Periodic Task Thread"</span> os_prio=<span class=number>31</span> tid=<span class=number>0x00007fc9df11a800</span> nid=<span class=number>0x3a03</span> waiting on condition </span><br><span class=line></span><br><span class=line>JNI global references: <span class=number>1087</span></span><br><span class=line></span><br><span class=line></span><br><span class=line>Found one Java-level deadlock:</span><br><span class=line>=============================</span><br><span class=line><span class=string>"mythread2"</span>:</span><br><span class=line> waiting <span class=keyword>for</span> ownable synchronizer <span class=number>0x000000076f5d4330</span>, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),</span><br><span class=line> which is held by <span class=string>"mythread1"</span></span><br><span class=line><span class=string>"mythread1"</span>:</span><br><span class=line> waiting <span class=keyword>for</span> ownable synchronizer <span class=number>0x000000076f5d4360</span>, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),</span><br><span class=line> which is held by <span class=string>"mythread2"</span></span><br><span class=line></span><br><span class=line>Java stack information <span class=keyword>for</span> the threads listed above:</span><br><span class=line>===================================================</span><br><span class=line><span class=string>"mythread2"</span>:</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f5d4330</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:<span class=number>836</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:<span class=number>870</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:<span class=number>1199</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:<span class=number>209</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:<span class=number>285</span>)</span><br><span class=line> at com.nicksxs.thread_dump_demo.ThreadDumpDemoApplication$<span class=number>2.</span>run(ThreadDumpDemoApplication.java:<span class=number>34</span>)</span><br><span class=line><span class=string>"mythread1"</span>:</span><br><span class=line> at sun.misc.Unsafe.park(Native Method)</span><br><span class=line> - parking to wait <span class=keyword>for</span> <<span class=number>0x000000076f5d4360</span>> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</span><br><span class=line> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:<span class=number>175</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:<span class=number>836</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:<span class=number>870</span>)</span><br><span class=line> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:<span class=number>1199</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:<span class=number>209</span>)</span><br><span class=line> at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:<span class=number>285</span>)</span><br><span class=line> at com.nicksxs.thread_dump_demo.ThreadDumpDemoApplication$<span class=number>1.</span>run(ThreadDumpDemoApplication.java:<span class=number>22</span>)</span><br><span class=line></span><br><span class=line>Found <span class=number>1</span> deadlock.</span><br></pre></table></figure><p>前面的信息其实上次就看过了,后面就可以发现有个死锁了,<br><img loading=lazy src=https://img.nicksxs.me/uPic/a1I2vj.png><br>上面比较长,把主要的截出来,就是这边的,这点就很强大了。<h3 id=jmap><a class=headerlink href=#jmap title=jmap></a>jmap</h3><p>惯例还是看一下帮助信息<br><img loading=lazy src=https://img.nicksxs.me/uPic/dBiPqS.png><br>这个相对命令比较多,不过因为现在 dump 下来我们可能会用文件模式,然后将文件下载下来使用 mat 进行分析,所以可以使用<br><code>jmap -dump:live,format=b,file=heap.bin <pid></code><br>命令照着上面看的就是打印活着的对象,然后以二进制格式,文件名叫 heap.bin 然后最后就是进程 id,打印出来以后可以用 mat 打开<br><img loading=lazy src=https://img.nicksxs.me/uPic/NRWowU.png><br>这样就可以很清晰的看到应用里的各种信息,jmap 直接在命令中还可以看很多信息,比如使用<code>jmap -histo <pid></code>打印对象的实例数和对象占用的内存<br><img loading=lazy src=https://img.nicksxs.me/uPic/1GTBrY.png><br><code>jmap -finalizerinfo <pid></code> 打印正在等候回收的对象<br><img loading=lazy src=https://img.nicksxs.me/uPic/Tb8uHP.png><h4 id=小tips><a class=headerlink href=#小tips title=小tips></a>小tips</h4><p>对于一些应用内存已经占满了,jstack 和 jmap 可能会连不上的情况,可以使用<code>-F</code>参数强制打印线程或者 dump 文件,但是要注意这两者使用的用户必须与 java 进程启动用户一致,并且使用的 jdk 也要一致</div><footer class=post-footer><div class="affiliate-creative affiliate-creative--post-end" data-affiliate-id=tencent-cloud-general><a rel="sponsored noopener" aria-label=腾讯云产品优惠 href=https://cloud.tencent.com/act/cps/redirect?redirect=2446&cps_key=2e33a1eedb380997d03618b4a5ba6ca7&from=console target=_blank><img alt=腾讯云服务器、数据库和云产品优惠 decoding=async height=419 loading=lazy src=/uploads/affiliate/tencent-cloud-general.webp width=690> 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