{"id":3942,"date":"2019-03-01T18:21:28","date_gmt":"2019-03-01T10:21:28","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=3942"},"modified":"2019-03-01T18:21:28","modified_gmt":"2019-03-01T10:21:28","slug":"%e7%ba%bf%e7%a8%8b%e9%9d%a2%e8%af%95%e5%bf%85%e5%a4%87%ef%bc%9a%e7%ba%bf%e7%a8%8b%e7%8a%b6%e6%80%81%e5%92%8cdump%e8%be%93%e5%87%ba%e7%8a%b6%e6%80%81","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=3942","title":{"rendered":"\u7ebf\u7a0b\u9762\u8bd5\u5fc5\u5907\uff1a\u7ebf\u7a0b\u72b6\u6001\u548cdump\u8f93\u51fa\u72b6\u6001"},"content":{"rendered":"<p>\n\t\u9762\u8bd5 Java\uff0c\u7ebf\u7a0b\u80af\u5b9a\u662f\u5c11\u4e0d\u4e86\u7684\u77e5\u8bc6\u70b9\u3002\u6240\u4ee5\uff0c\u5b66\u4e60\u5b83\u80af\u5b9a\u662f\u5fc5\u987b\u7684\uff0c\u5343\u4e07\u4e0d\u80fd\u7b49\u5230\u9047\u5230\u91c7\u53d6\u624d\u53bb\u5b66\uff0c\u90a3\u5c31\u665a\u4e86\u3002\n<\/p>\n<p>\n\t\u4e00\u822c\u7684\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u6709 6 \u79cd\u72b6\u6001\u3002\n<\/p>\n<pre class=\"brush:java;\">\r\npublic enum State {\r\n    NEW,\r\n    RUNNABLE,\r\n    BLOCKED,\r\n    WAITING,\r\n    TIMED_WAITING,\r\n    TERMINATED;\r\n}<\/pre>\n<p>\n\t\u4e0b\u9762\u89e3\u91ca\u4e00\u4e0b\u8fd9 6 \u79cd\u72b6\u6001\u3002\n<\/p>\n<p>\n\tnew \u4ee3\u8868\u65b0\u5efa\u72b6\u6001\uff1bRUNNABLE \u8fd0\u884c\u72b6\u6001\uff0c\u5c31\u7eea\uff08ready\uff09\u548c\u8fd0\u884c\u4e2d\uff08running\uff09\u4e24\u79cd\u72b6\u6001\u7b3c\u7edf\u7684\u79f0\u4e3a&ldquo;\u8fd0\u884c&rdquo;\uff1bBLOCKED \u963b\u585e\u72b6\u6001\uff0c\u7ebf\u7a0b\u963b\u585e\u4e8e\u9501\uff1bWAITING \u7b49\u5f85\u72b6\u6001\uff0c\u8fdb\u5165\u8be5\u72b6\u6001\u7684\u7ebf\u7a0b\u9700\u8981\u7b49\u5f85\u5176\u4ed6\u7ebf\u7a0b\u505a\u51fa\u4e00\u4e9b\u7279\u5b9a\u52a8\u4f5c\uff08\u901a\u77e5\u6216\u4e2d\u65ad\uff09\uff1bTIMED_WAITING \u8d85\u65f6\u7b49\u5f85\u72b6\u6001\uff0c\u8be5\u72b6\u6001\u4e0d\u540c\u4e8eWAITING\uff0c\u5b83\u53ef\u4ee5\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u540e\u81ea\u884c\u8fd4\u56de\uff1bTERMINATED \u7ec8\u6b62\u72b6\u6001\uff0c\u8868\u793a\u8be5\u7ebf\u7a0b\u5df2\u7ecf\u6267\u884c\u5b8c\u6bd5\u3002\n<\/p>\n<p>\n\t<img decoding=\"async\" alt=\"Java 6 \u79cd\u7ebf\u7a0b\u72b6\u6001\u7684\u8f6c\u6362\u56fe\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1g0nfl7p8ryj20w30lfad7.jpg\" style=\"width: 1155px;height: 771px\" \/>\n<\/p>\n<p>\n\t\u5982\u679c\u8fd8\u6709\u4e0d\u61c2\u7684\uff0c\u53ef\u4ee5\u770b\u6211\u7684\u8fd9\u7bc7\u6587\u7ae0\u300a<a href=\"https:\/\/mp.weixin.qq.com\/s\/_1pU-nfok24dCfYz_jyQfA\">\u4e86\u89e3\u591a\u7ebf\u7a0b\uff0c\u5148\u4ece&ldquo;\u56fe&rdquo;\u4e86\u89e3\u7ebf\u7a0b\u7684\u57fa\u672c\u72b6\u6001\uff01<\/a>\u300b\u3002\n<\/p>\n<p>\n\t\u8fd9 6 \u79cd\u72b6\u6001\u770b\u8d77\u6765\u5f88\u597d\u7406\u89e3\uff0c\u4f46\u662f\u518d\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u5f53\u7a0b\u5e8f\u51fa\u73b0\u5f02\u5e38\u540e\uff0c\u4f60\u4f1a\u53d1\u73b0\u5806\u6808\u4e2d\u7684\u72b6\u6001\u548c\u4e0a\u9762\u7684\u72b6\u6001\u4e0d\u4e00\u6837\u3002\n<\/p>\n<p>\n\t\u5728 dump \u6587\u4ef6\u91cc\uff0c\u5404\u79cd\u7ebf\u7a0b\u72b6\u6001\u89e3\u91ca\u5982\u4e0b\uff1a\n<\/p>\n<ul>\n<li>\n\t\t\u6b7b\u9501\uff0cDeadlock\uff08\u91cd\u70b9\u5173\u6ce8\uff09\n\t<\/li>\n<li>\n\t\t\u6267\u884c\u4e2d\uff0cRunnable\n\t<\/li>\n<li>\n\t\t\u7b49\u5f85\u8d44\u6e90\uff0cWaiting on condition\uff08\u91cd\u70b9\u5173\u6ce8\uff09\n\t<\/li>\n<li>\n\t\t\u7b49\u5f85\u83b7\u53d6\u76d1\u89c6\u5668\uff0cWaiting on monitor entry\uff08\u91cd\u70b9\u5173\u6ce8\uff09\n\t<\/li>\n<li>\n\t\t\u5bf9\u8c61\u7b49\u5f85\u4e2d\uff0cObject.wait() \u6216 TIMED_WAITING\n\t<\/li>\n<li>\n\t\t\u6682\u505c\uff0cSuspended\n\t<\/li>\n<li>\n\t\t\u963b\u585e\uff0cBlocked\uff08\u91cd\u70b9\u5173\u6ce8\uff09\n\t<\/li>\n<li>\n\t\t\u505c\u6b62\uff0cParked\n\t<\/li>\n<\/ul>\n<p>\n\t\u5173\u4e8e\u4e0a\u9762\u63d0\u5230\u7684\u91cd\u70b9\u5173\u6ce8\u7684\u51e0\u4e2a\u72b6\u6001\uff0c\u6211\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u3002\n<\/p>\n<h2>\n\t\u6b7b\u9501 Deadlock \u72b6\u6001<br \/>\n<\/h2>\n<p>\n\t<img decoding=\"async\" alt=\"\u7ebf\u7a0b\u6b7b\u9501 Deadlock \u72b6\u6001\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1g0nfmq9bmrj20go07emz7.jpg\" style=\"width: 600px;height: 266px\" \/>\n<\/p>\n<p>\n\t\u8fd9\u662f\u4e00\u4e2a\u5178\u578b\u7684\u6b7b\u9501\u5806\u6808\uff0ct1 \u7ebf\u7a0b lock \u5728\u5730\u5740 0x22a297a8\uff0c\u540c\u65f6 t2 \u7ebf\u7a0b\u5728 waiting to lock \u8fd9\u4e2a\u5730\u5740\u3002\u66f4\u6709\u610f\u601d\u7684\u662f\uff0c\u5806\u6808\u4e5f\u8bb0\u5f55\u4e86\u53d1\u751f\u6b7b\u9501\u7684\u4ee3\u7801\u884c\u6570\uff0c\u8fd9\u5bf9\u6211\u4eec\u5b9a\u4f4d\u95ee\u9898\u8d77\u5230\u5f88\u5927\u7684\u5e2e\u52a9\u3002\n<\/p>\n<h2>\n\t\u7b49\u5f85\u8d44\u6e90 Waiting on condition<br \/>\n<\/h2>\n<p>\n\t\u6700\u5e38\u89c1\u60c5\u51b5\u662f\u8be5\u7ebf\u7a0b\u5728 sleep\uff0c\u7b49\u5f85 sleep\u7684\u65f6\u95f4\u5230\u4e86\u65f6\u5019\uff0c\u5c06\u88ab\u5524\u9192\u3002\u5173\u952e\u5b57\uff1aTIMED_WAITING,sleeping,parking\u3002TIMED_WAITING\u53ef\u80fd\u662f\u8c03\u7528\u4e86\u6709\u8d85\u65f6\u53c2\u6570\u7684wait\u6240\u5f15\u8d77\u7684\u3002parking\u6307\u7ebf\u7a0b\u5904\u4e8e\u6302\u8d77\u4e2d\u3002\n<\/p>\n<pre class=\"brush:bash;\">\r\n&quot;thread-1&quot; prio=10 tid=0x00007fbe985cd000 nid=0x7bc6 waiting on condition [0x00007fbe65848000]\r\n  java.lang.Thread.State: TIMED_WAITING (sleeping)\r\n       at java.lang.Thread.sleep(Native Method)\r\n       at com.xxx.MonitorManager$2.run(MonitorManager.java:124)\r\n       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)\r\n       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)\r\n       at java.lang.Thread.run(Thread.java:662)<\/pre>\n<p>\n\t\u5982\u679c\u5806\u6808\u4fe1\u606f\u660e\u786e\u662f\u5e94\u7528\u4ee3\u7801\uff0c\u5219\u8bc1\u660e\u8be5\u7ebf\u7a0b\u6b63\u5728\u7b49\u5f85\u8d44\u6e90\u3002\u4e00\u822c\u662f\u5927\u91cf\u8bfb\u53d6\u67d0\u8d44\u6e90\uff0c\u4e14\u8be5\u8d44\u6e90\u91c7\u7528\u4e86\u8d44\u6e90\u9501\u7684\u60c5\u51b5\u4e0b\uff0c\u7ebf\u7a0b\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u7b49\u5f85\u8d44\u6e90\u7684\u8bfb\u53d6\u3002\n<\/p>\n<p>\n\t<img decoding=\"async\" alt=\"\u5806\u6808\u7ebf\u7a0b WAITING parking\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1g0nfnv63zhj20nv04habw.jpg\" style=\"width: 859px;height: 161px\" \/>\n<\/p>\n<h2>\n\tWaiting on monitor entry<br \/>\n<\/h2>\n<p>\n\t\u610f\u5473\u7740\u7ebf\u7a0b\u5728\u7b49\u5f85\u8fdb\u5165\u4e00\u4e2a\u4e34\u754c\u533a\u3002Monitor \u662f Java\u4e2d\u7528\u4ee5\u5b9e\u73b0\u7ebf\u7a0b\u4e4b\u95f4\u7684\u4e92\u65a5\u4e0e\u534f\u4f5c\u7684\u4e3b\u8981\u624b\u6bb5\uff0c\u5b83\u53ef\u4ee5\u770b\u6210\u662f\u5bf9\u8c61\u6216\u8005 Class\u7684\u9501\u3002\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u6709\uff0c\u4e5f\u4ec5\u6709\u4e00\u4e2a monitor\u3002\n<\/p>\n<p>\n\t\u8fd9\u79cd\u72b6\u6001\u901a\u5e38\u53d1\u751f\u5728\u7ebf\u7a0b\u5728\u7b49\u5f85\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u8fd4\u56de\u4e00\u4e2a\u53ef\u7528\u7684\u94fe\u63a5\u3002\n<\/p>\n<pre class=\"brush:java;\">\r\n&quot; DB-Processor-13&quot; daemon prio=5 tid=0x003edf98 nid=0xca waiting for monitor entry [0x000000000825f000]\r\njava.lang.Thread.State: BLOCKED (on object monitor)\r\n       at beans.ConnectionPool.getConnection(ConnectionPool.java:102)\r\n       - waiting to lock &lt;0xe0375410&gt; (a beans.ConnectionPool)\r\n       at xxx.getTodayCount(ServiceCnt.java:111)\r\n       at xxx.ServiceCnt.insertCount(ServiceCnt.java:43)<\/pre>\n<h2>\n\tBlocked<br \/>\n<\/h2>\n<p>\n\t\u7ebf\u7a0b\u963b\u585e\uff0c\u662f\u6307\u5f53\u524d\u7ebf\u7a0b\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6240\u9700\u8981\u7684\u8d44\u6e90\u957f\u65f6\u95f4\u7b49\u5f85\u5374\u4e00\u76f4\u672a\u80fd\u83b7\u53d6\u5230\uff0c\u88ab\u5bb9\u5668\u7684\u7ebf\u7a0b\u7ba1\u7406\u5668\u6807\u8bc6\u4e3a\u963b\u585e\u72b6\u6001\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u7b49\u5f85\u8d44\u6e90\u8d85\u65f6\u7684\u7ebf\u7a0b\u3002\u5982\u679c\u7ebf\u7a0b\u5904\u4e8e Blocked \u72b6\u6001\uff0c\u4f46\u662f\u539f\u56e0\u4e0d\u6e05\u695a\u3002\u53ef\u4ee5\u4f7f\u7528 jstack -m pid \u5f97\u5230\u7ebf\u7a0b\u7684 mixed \u4fe1\u606f\u3002\n<\/p>\n<pre class=\"brush:java;\">\r\n----------------- t@13 -----------------\r\n0xff31e8b8      ___lwp_cond_wait + 0x4\r\n0xfea8c810      void ObjectMonitor::EnterI(Thread*) + 0x2b8\r\n0xfeac86b8      void ObjectMonitor::enter2(Thread*) + 0x250<\/pre>\n<p>\n\t\u4f8b\u5982\uff0c\u4e0a\u9762\u7684\u4fe1\u606f\u8868\u660e\uff0c\u7ebf\u7a0b\u5728\u5c1d\u8bd5\u8fdb\u5165\u540c\u6b65\u5757\u65f6\u963b\u585e\u4e86\u3002\n<\/p>\n<p>\n\t\u4ee5\u4e0a\u5185\u5bb9\uff0c\u559c\u6b22\u5bf9\u5927\u5bb6\u7684\u9762\u8bd5\u6709\u6240\u5e2e\u52a9\u3002\u6700\u540e\uff0c\u6211\u8981\u5f3a\u8c03\u4e00\u4e0b\u3002\n<\/p>\n<p>\n\t\u5f53\u7a0b\u5e8f\u51fa\u73b0\u6545\u969c\uff0c\u5f80\u5f80\u4e00\u6b21 dump \u7684\u4fe1\u606f\uff0c\u8fd8\u4e0d\u8db3\u4ee5\u786e\u8ba4\u95ee\u9898\u3002\u5efa\u8bae\u4ea7\u751f\u4e09\u6b21 dump \u4fe1\u606f\uff0c\u5982\u679c\u6bcf\u6b21 dump \u90fd\u6307\u5411\u540c\u4e00\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u624d\u786e\u5b9a\u95ee\u9898\u7684\u5178\u578b\u6027\u3002\n<\/p>\n<p>\n\t\u5806\u6808\u4fe1\u606f\u53ea\u662f\u4e00\u79cd\u53c2\u8003\uff0c\u4e00\u4e9b\u6b63\u5e38 RUNNING \u7684\u7ebf\u7a0b\uff0c\u7531\u4e8e\u590d\u6742\u7f51\u7edc\u73af\u5883\u548c IO \u7684\u5f71\u54cd\uff0c\u4e5f\u662f\u6709\u95ee\u9898\u7684\uff0c\u7528 jstack \u5c31\u65e0\u6cd5\u5b9a\u4f4d\uff0c\u9700\u8981\u7ed3\u5408\u5bf9\u4e1a\u52a1\u4ee3\u7801\u7684\u7406\u89e3\u3002<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=3942\">\u7ebf\u7a0b\u9762\u8bd5\u5fc5\u5907\uff1a\u7ebf\u7a0b\u72b6\u6001\u548cdump\u8f93\u51fa\u72b6\u6001<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u9762\u8bd5 Java\uff0c\u7ebf\u7a0b\u80af\u5b9a\u662f\u5c11\u4e0d\u4e86\u7684\u77e5\u8bc6\u70b9\u3002\u6240\u4ee5\uff0c\u5b66\u4e60\u5b83\u80af\u5b9a\u662f\u5fc5\u987b\u7684\uff0c\u5343\u4e07\u4e0d\u80fd\u7b49\u5230\u9047\u5230\u91c7\u53d6\u624d\u53bb\u5b66\uff0c\u90a3\u5c31\u665a\u4e86\u3002 \u4e00 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