{"id":921,"date":"2014-05-15T22:22:23","date_gmt":"2014-05-15T14:22:23","guid":{"rendered":"http:\/\/coderbee.net\/?p=921"},"modified":"2014-11-27T22:38:00","modified_gmt":"2014-11-27T14:38:00","slug":"java-se-6-%e6%95%85%e9%9a%9c%e6%8e%92%e9%99%a4%e6%8c%87%e5%8d%97-5%e3%80%81%e6%8c%82%e8%b5%b7%e6%88%96%e5%be%aa%e7%8e%af%e8%bf%9b%e7%a8%8b%e6%95%85%e9%9a%9c%e6%8e%92%e9%99%a4","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/jvm\/20140515\/921","title":{"rendered":"Java SE 6 \u6545\u969c\u6392\u9664\u6307\u5357 – 5\u3001\u6302\u8d77\u6216\u5faa\u73af\u8fdb\u7a0b\u6545\u969c\u6392\u9664"},"content":{"rendered":"

\u672c\u7ae0\u4e3a\u6302\u8d77\u6216\u5faa\u73af\u8fdb\u7a0b\u7684\u6545\u969c\u6392\u9664\u5728\u7279\u5b9a\u7a0b\u5e8f\u4e0a\u63d0\u4f9b\u4e86\u4fe1\u606f\u548c\u6307\u5bfc\u3002<\/p>\n

\u95ee\u9898\u5728\u6d89\u53ca\u6302\u8d77\u6216\u5faa\u73af\u8fdb\u7a0b\u65f6\u53d1\u751f\u3002\u6302\u8d77\u53ef\u80fd\u56e0\u4e3a\u591a\u79cd\u539f\u56e0\u53d1\u751f\uff0c\u4f46\u7ecf\u5e38\u662f\u6e90\u4e8e\u7a0b\u5e8f\u4ee3\u7801\u3001API\u4ee3\u7801\u6216\u5e93\u4ee3\u7801\u91cc\u7684\u6b7b\u9501\u3002\u6302\u8d77\u751a\u81f3\u662f\u56e0\u4e3a HotSpot VM\u7684bug\u3002<\/p>\n

\u6709\u65f6\u5019\uff0c\u4e00\u4e2a\u8868\u9762\u4e0a\u662f\u6302\u8d77\u7684\u53ef\u80fd\u662f\u4e2a\u5faa\u73af\u3002\u4f8b\u5982\uff0cVM\u8fdb\u7a0b\u91cc\u7684bug\u5bfc\u81f4\u4e00\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u8fdb\u5165\u6b7b\u5faa\u73af\uff0c\u4f1a\u6d88\u8017\u6389\u6240\u6709\u53ef\u5f97CPU\u5468\u671f\u3002<\/p>\n

\u8bca\u65ad\u6302\u8d77\u7684\u6700\u521d\u6b65\u9aa4\u662f\u627e\u51faVM\u8fdb\u7a0b\u662f\u7a7a\u95f2\u8fd8\u662f\u6d88\u8017\u4e86\u6240\u6709\u53ef\u5f97CPU\u5468\u671f\uff0c\u4e3a\u505a\u8fd9\u4e2a\u8981\u6c42\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u5de5\u5177\u3002\u5982\u679c\u8fdb\u7a0b\u8868\u73b0\u4e3a\u7e41\u5fd9\u4e14\u6d88\u8017\u4e86\u6240\u6709\u53ef\u5f97CPU\u5468\u671f\uff0c\u90a3\u4e48\u95ee\u9898\u5f88\u53ef\u80fd\u662f\u5faa\u73af\u7ebf\u7a0b\u800c\u4e0d\u662f\u6b7b\u9501\u3002<\/p>\n

<\/p>\n

5.1 \u8bca\u65ad\u5faa\u73af\u8fdb\u7a0b<\/h2>\n

\u5982\u679cVM\u8fdb\u7a0b\u8868\u73b0\u4e3a\u5faa\u73af\uff0c\u7b2c\u4e00\u6b65\u662f\u5c1d\u8bd5\u83b7\u53d6\u7ebf\u7a0b\u8f6c\u50a8\u3002\u5982\u679c\u83b7\u53d6\u4e86\u7ebf\u7a0b\u8f6c\u50a8\uff0c\u901a\u5e38\u54ea\u4e2a\u7ebf\u7a0b\u5728\u5faa\u73af\u662f\u5f88\u660e\u663e\u7684\u3002\u5982\u679c\u5faa\u73af\u7ebf\u7a0b\u88ab\u8ba4\u5b9a\uff0c\u7ebf\u7a0b\u8f6c\u50a8\u91cc\u7684\u6808\u8f68\u8ff9\u53ef\u4ee5\u63d0\u4f9b\u7ebf\u7a0b\u5728\u54ea\u91cc\uff08\u53ef\u80fd\u8fd8\u6709\u4e3a\u4ec0\u4e48\uff09\u5faa\u73af\u7684\u65b9\u5411\u3002<\/p>\n

\u5982\u679c\u7a0b\u5e8f\u63a7\u5236\u53f0\uff08\u6807\u51c6\u8f93\u5165\u8f93\u51fa\uff09\u53ef\u5f97\uff0c\u6309\u4e0b Ctrl-\\<\/code> \u952e\u7ec4\u5408\uff08Solaris OS \u6216 Linux\u4e0a\uff09\u6216 Ctrl-Break<\/code> \u952e\u7ec4\u5408\uff08Windows\u4e0a\uff09\u5f15\u8d77 HotSpot VM \u6253\u5370\u7ebf\u7a0b\u8f6c\u50a8\uff0c\u5305\u62ec\u7ebf\u7a0b\u72b6\u6001\u3002\u5728Solaris OS \u548cLinux\u4e0a\uff0c\u7ebf\u7a0b\u8f6c\u50a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u53d1\u9001 SIGQUIT<\/code> \u5230\u8fdb\u7a0b\uff08\u547d\u4ee4\uff1akill -QUIT <pid><\/code>\uff09\u6765\u83b7\u5f97\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7ebf\u7a0b\u8f6c\u50a8\u5c06\u88ab\u6253\u5370\u5230\u76ee\u6807\u8fdb\u7a0b\u7684\u6807\u51c6\u8f93\u51fa\u3002\u8f93\u51fa\u4e5f\u53ef\u4ee5\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\uff0c\u53d6\u51b3\u4e8e\u8fdb\u7a0b\u5982\u679c\u542f\u52a8\u3002<\/p>\n

\u5982\u679cJava\u8fdb\u7a0b\u662f\u5e26 -XX:+PrintClassHistogram<\/code> \u9009\u9879\u542f\u52a8\u7684\uff0c Ctrl-Break<\/code> \u5904\u7406\u5c06\u751f\u6210\u5806\u76f4\u65b9\u56fehistogram\u3002<\/p>\n

\u5982\u679c\u7ebf\u7a0b\u8f6c\u50a8\u88ab\u83b7\u53d6\u4e86\uff0crunnable\u72b6\u6001\u7684\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u8f68\u8ff9\u662f\u4e2a\u597d\u7684\u8d77\u70b9\u3002\u7ebf\u7a0b\u8f6c\u50a8\u7684\u683c\u5f0f\u7684\u66f4\u591a\u4fe1\u606f\u89c1 2.15.1 \u8282\uff0c\u8fd8\u6709\u7ebf\u7a0b\u8f6c\u50a8\u91cc\u53ef\u80fd\u7684\u7ebf\u7a0b\u72b6\u6001\u8868\u683c\u3002\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u83b7\u53d6\u4e00\u5e8f\u5217\u7ebf\u7a0b\u8f6c\u50a8\u6765\u786e\u5b9a\u54ea\u4e2a\u7ebf\u7a0b\u662f\u6301\u7eed\u7e41\u5fd9\u7684\u3002<\/p>\n

\u5982\u679c\u7a0b\u5e8f\u63a7\u5236\u53f0\u4e0d\u53ef\u5f97\uff08\u8fdb\u7a0b\u8fd0\u884c\u5728\u540e\u53f0\u6216VM\u8f93\u51fa\u88ab\u91cd\u5b9a\u5411\u5230\u672a\u77e5\u5730\u65b9\uff09\uff0cjstack \u5de5\u5177\u53ef\u7528\u4e8e\u83b7\u53d6\u7ebf\u7a0b\u8f68\u8ff9\u3002\u7528 jstack -F pid<\/code> \u9009\u9879\u6765\u5f3a\u5236\u5faa\u73af\u8fdb\u7a0b\u751f\u6210\u6808\u8f6c\u50a8\u3002\u4ece2.11\u8282\u67e5\u770b\u8fd9\u4e2a\u5de5\u5177\u7684\u8f93\u51fa\u7684\u4fe1\u606f\u3002jstack \u5de5\u5177\u4e5f\u7528\u4e8e\u5982\u679c\u7ebf\u7a0b\u8f6c\u50a8\u4e0d\u80fd\u63d0\u4f9bJava \u7ebf\u7a0b\u5faa\u73af\u7684\u8bc1\u636e\u7684\u60c5\u51b5\u3002<\/p>\n

\u5f53\u67e5\u770b jstack \u5de5\u5177\u7684\u8f93\u51fa\u65f6\uff0c\u5f00\u59cb\u65f6\u4e13\u6ce8\u4e8e\u5904\u4e8e RUNNABLE<\/code> \u72b6\u6001\u7684\u7ebf\u7a0b\u3002\u8fd9\u4e2a\u72b6\u6001\u5f88\u53ef\u80fd\u662f\u56e0\u4e3a\u7ebf\u7a0b\u662f\u7e41\u5fd9\u548c\u5faa\u73af\u3002\u53ef\u80fd\u9700\u8981\u6267\u884c jstack \u591a\u6b21\u6765\u83b7\u5f97\u4e00\u4e2a\u7ebf\u7a0b\u5faa\u73af\u7684\u5b8c\u6574\u56fe\uff08\u8bd1\u6ce8\uff1a\u4e5f\u5c31\u662f\u901a\u8fc7\u5bf9\u6bd4\u4e00\u5e8f\u5217\u8f6c\u50a8\u6765\u786e\u5b9a\uff09\u3002\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u603b\u662f\u8868\u73b0\u4e3a RUNNABLE<\/code> \u72b6\u6001\uff0c-m<\/code> \u9009\u9879\u53ef\u7528\u4e8e\u6253\u5370\u672c\u5730\u5e27\u548c\u63d0\u4f9b\u7ebf\u7a0b\u5728\u505a\u4ec0\u4e48\u7684\u66f4\u591a\u63d0\u793a\u3002\u5982\u679c\u7ebf\u7a0b\u5728 RUNNABLE<\/code> \u72b6\u6001\u8868\u73b0\u51fa\u6301\u7eed\u5faa\u73af\uff0c\u8fd9\u4e2a\u60c5\u51b5\u6307\u793a\u4e86\u4e00\u4e2a\u6f5c\u5728\u7684 HotSpot VM bug\uff0c\u9700\u8981\u8fdb\u4e00\u6b65\u8c03\u67e5\u3002<\/p>\n

\u5982\u679cVM\u4e0d\u54cd\u5e94 Ctrl-\\<\/code>\uff0c\u8fd9\u53ef\u80fd\u6307\u793a\u4e86VM bug\u800c\u4e0d\u662f\u7a0b\u5e8f\u6216\u5e93\u4ee3\u7801\u7684\u95ee\u9898issue\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cjstack -m -F<\/code> \u53ef\u7528\u4e8e\u83b7\u53d6\u6240\u6709\u7ebf\u7a0b\u7684\u6808\u3002\u8fd9\u4e2a\u8f93\u51fa\u5c06\u5305\u62ecVM\u5185\u90e8\u7ebf\u7a0b\u7684\u6808\u3002\u5728\u8fd9\u4e2a\u6808\u8f68\u8ff9\u91cc\uff0c\u6807\u8bc6\u90a3\u4e9b\u6ca1\u6709\u8868\u73b0\u51fa\u7b49\u5f85\u7684\u7ebf\u7a0b\u3002<\/p>\n

5.2 \u8bca\u65ad\u6302\u8d77\u8fdb\u7a0b<\/h2>\n

\u5982\u679c\u7a0b\u5e8f\u8868\u73b0\u51fa\u6302\u8d77\u4e14\u8fdb\u7a0b\u8868\u73b0\u51fa\u7a7a\u95f2\uff0c\u90a3\u4e48\u7b2c\u4e00\u6b65\u662f\u5c1d\u8bd5\u83b7\u53d6\u7ebf\u7a0b\u8f6c\u50a8\u3002\u5982\u679c\u7a0b\u5e8f\u63a7\u5236\u53f0\u53ef\u5f97\uff0c\u6309\u4e0b Ctrl-\\<\/code> \uff08Solaris OS \u6216 Linux\u4e0a\uff09\u6216 Ctrl-Break<\/code> \uff08Windows\u4e0a\uff09\u5f15\u8d77 HotSpot VM \u6253\u5370\u7ebf\u7a0b\u8f6c\u50a8 \u3002\u5728Solaris OS \u548cLinx\u4e0a\uff0c\u7ebf\u7a0b\u8f6c\u50a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u53d1\u9001 SIGQUIT<\/code> \u5230\u8fdb\u7a0b\uff08\u547d\u4ee4\uff1akill -QUIT <pid><\/code>\uff09\u6765\u83b7\u5f97\u3002<\/p>\n

5.2.1 \u68c0\u6d4b\u5230\u6b7b\u9501<\/h3>\n

\u5982\u679c\u6302\u8d77\u8fdb\u7a0b\u80fd\u591f\u751f\u6210\u7ebf\u7a0b\u8f6c\u50a8\uff0c\u8f93\u51fa\u5c06\u88ab\u6253\u5370\u5230\u76ee\u6807\u8fdb\u7a0b\u7684\u6807\u51c6\u8f93\u51fa\u3002\u6253\u5370\u7ebf\u7a0b\u8f6c\u50a8\u4e4b\u540e\uff0cHotSpot VM \u6267\u884c\u4e00\u4e2a\u6b7b\u9501\u68c0\u6d4b\u7b97\u6cd5\u3002\u5982\u679c\u68c0\u6d4b\u5230\u6b7b\u9501\uff0c\u6b7b\u9501\u5c06\u4e0e\u6d89\u53ca\u6b7b\u9501\u7684\u7ebf\u7a0b\u7684\u6808\u8f68\u8ff9\u4e00\u8d77\u8f93\u51fa\u3002\u4e0b\u9762\u662f\u8f93\u51fa\u793a\u4f8b\uff1a<\/p>\n

Found one Java-level deadlock:\n=============================\n\"AWT-EventQueue-0\":\n  waiting to lock monitor 0x000ffbf8 (object 0xf0c30560, a java.awt.Component$AWTTreeLock),\n  which is held by \"main\"\n\"main\":\n  waiting to lock monitor 0x000ffe38 (object 0xf0c41ec8, a java.util.Vector),\n  which is held by \"AWT-EventQueue-0\"\n\nJava stack information for the threads listed above:\n===================================================\n\"AWT-EventQueue-0\":\n        at java.awt.Container.removeNotify(Container.java:2503)\n        - waiting to lock <0xf0c30560> (a java.awt.Component$AWTTreeLock)\n        at java.awt.Window$1DisposeAction.run(Window.java:604)\n        at java.awt.Window.doDispose(Window.java:617)\n        at java.awt.Dialog.doDispose(Dialog.java:625)\n        at java.awt.Window.dispose(Window.java:574)\n        at java.awt.Window.disposeImpl(Window.java:584)\n        at java.awt.Window$1DisposeAction.run(Window.java:598)\n        - locked <0xf0c41ec8> (a java.util.Vector)\n        at java.awt.Window.doDispose(Window.java:617)\n        at java.awt.Window.dispose(Window.java:574)\n        at javax.swing.SwingUtilities$SharedOwnerFrame.dispose(SwingUtilities.java:1743)\n        at javax.swing.SwingUtilities$SharedOwnerFrame.windowClosed(SwingUtilities.java:1722)\n        at java.awt.Window.processWindowEvent(Window.java:1173)\n        at javax.swing.JDialog.processWindowEvent(JDialog.java:407)\n        at java.awt.Window.processEvent(Window.java:1128)\n        at java.awt.Component.dispatchEventImpl(Component.java:3922)\n        at java.awt.Container.dispatchEventImpl(Container.java:2009)\n        at java.awt.Window.dispatchEventImpl(Window.java:1746)\n        at java.awt.Component.dispatchEvent(Component.java:3770)\n        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)\n        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:214)\n        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)\n        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)\n        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)\n        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)\n\"main\":\n        at java.awt.Window.getOwnedWindows(Window.java:844)\n        - waiting to lock <0xf0c41ec8> (a java.util.Vector)\n        at javax.swing.SwingUtilities$SharedOwnerFrame.installListeners(SwingUtilities.java:1697)\n        at javax.swing.SwingUtilities$SharedOwnerFrame.addNotify(SwingUtilities.java:1690)\n        at java.awt.Dialog.addNotify(Dialog.java:370)\n        - locked <0xf0c30560> (a java.awt.Component$AWTTreeLock)\n        at java.awt.Dialog.conditionalShow(Dialog.java:441)\n        - locked <0xf0c30560> (a java.awt.Component$AWTTreeLock)\n        at java.awt.Dialog.show(Dialog.java:499)\n        at java.awt.Component.show(Component.java:1287)\n        at java.awt.Component.setVisible(Component.java:1242)\n        at test01.main(test01.java:10)\n\nFound 1 deadlock.\n\n<\/code><\/pre>\n
\u9ed8\u8ba4\u7684\u6b7b\u9501\u68c0\u6d4b\u53ef\u4ee5\u548c\u901a\u8fc7 synchronized<\/code> \u5173\u952e\u5b57\u83b7\u53d6\u7684\u9501\uff0c\u8fd8\u6709\u901a\u8fc7 java.util.concurrent<\/code> \u5305\u83b7\u53d6\u7684\u9501\u4e00\u8d77\u5de5\u4f5c\u3002\u5982\u679c\u8bbe\u7f6e\u4e86 JVM \u7684 -XX:+PrintConcurrentLocks<\/code> \u6807\u8bb0\uff0c\u90a3\u4e48\u6808\u8f68\u8ff9\u4e5f\u663e\u793a\u9501\u5c5e\u4e3b\u7684\u5217\u8868\u3002<\/p>\n
\u5982\u679c\u68c0\u6d4b\u5230\u6b7b\u9501\uff0c\u4f60\u5fc5\u987b\u66f4\u8be6\u7ec6\u5730\u68c0\u9a8c\u6765\u7406\u89e3\u6b7b\u9501\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u91cc\uff0c\u7ebf\u7a0b main<\/code> \u9501\u5b9a\u4e86\u5bf9\u8c61 <0xf0c30560><\/code>\uff0c\u5e76\u7b49\u5f85\u8fdb\u5165 0xf0c41ec8<\/code>\uff0c\u5b83\u662f\u7531\u7ebf\u7a0b AWT-EventQueue-0<\/code> \u9501\u5b9a\u7684\u3002\u7136\u800c\uff0c\u7ebf\u7a0b AWT-EventQueue-0<\/code> \u6b63\u5728\u7b49\u5f85 0xf0c30560<\/code>\uff0c\u800c\u5b83\u662f\u7531\u7ebf\u7a0b main<\/code> \u9501\u5b9a\u3002<\/p>\n
\u6808\u8f68\u8ff9\u91cc\u7684\u8be6\u7ec6\u4fe1\u606f\u63d0\u4f9b\u4e86\u67e5\u627e\u6b7b\u9501\u7684\u5e2e\u52a9\u3002<\/p>\n
5.2.2 \u672a\u68c0\u6d4b\u5230\u6b7b\u9501<\/h3>\n
\u5982\u679c\u7ebf\u7a0b\u8f6c\u50a8\u88ab\u6253\u5370\u4e14\u6ca1\u6709\u53d1\u73b0\u6b7b\u9501\uff0c\u90a3\u4e48\u95ee\u9898\u53ef\u80fd\u662f\u4e2abug\uff0c\u7ebf\u7a0b\u5728\u76d1\u89c6\u5668\u4e0a\u7b49\u5f85\u4f46\u4ece\u672a\u6536\u5230\u901a\u77e5\u3002\u8fd9\u53ef\u80fd\u662f\u4e2a\u5b9a\u65f6timing\u95ee\u9898\u6216\u4e00\u822c\u7684\u903b\u8f91\u9519\u8bef\u3002<\/p>\n
\u4e3a\u627e\u51fa\u95ee\u9898\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u68c0\u67e5\u7ebf\u7a0b\u8f6c\u50a8\u91cc\u7684\u6bcf\u4e2a\u7ebf\u7a0b\u548c\u6bcf\u4e2a\u963b\u585e\u5728 Object.wait()<\/code> \u7684\u7ebf\u7a0b\u3002\u6808\u8f68\u8ff9\u91cc\u7684\u8c03\u7528\u5e27\u6307\u793a\u4e86\u6b63\u5728\u8c03\u7528 wait()<\/code> \u7684\u7c7b\u548c\u65b9\u6cd5\u3002\u5982\u679c\u4ee3\u7801\u7f16\u8bd1\u65f6\uff08\u9ed8\u8ba4\uff09\u5305\u542b\u4e86\u884c\u53f7\u4fe1\u606f\uff0c\u8fd9\u76f4\u63a5\u63d0\u4f9b\u4e86\u68c0\u67e5\u7684\u65b9\u5411\uff08\u8bd1\u6ce8\uff1a\u53ef\u4ee5\u76f4\u63a5\u770b\u5230\u54ea\u884c\u6e90\u7801\u5728\u8c03\u7528 wait \u65b9\u6cd5\uff09\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u4e3a\u8fdb\u4e00\u6b65\u8bca\u65ad\u95ee\u9898\uff0c\u4f60\u5fc5\u987b\u6709\u7a0b\u5e8f\u903b\u8f91\u6216\u5e93\u7684\u77e5\u8bc6\u3002\u901a\u5e38\uff0c\u4f60\u5fc5\u987b\u660e\u767d\u7a0b\u5e8f\u7684\u540c\u6b65\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u7279\u522b\u662f\u76d1\u89c6\u5668\u4f55\u65f6\u3001\u4f55\u5730\u88ab\u901a\u77e5\u7684\u7ec6\u8282\u548c\u6761\u4ef6\u3002<\/p>\n
5.2.3  \u6ca1\u6709\u7ebf\u7a0b\u8f6c\u50a8<\/h3>\n
\u5982\u679cVM\u4e0d\u54cd\u5e94 Ctrl-\\<\/code> \u6216 Ctrl-Break<\/code> \uff0c\u53ef\u80fd\u662fVM\u6b7b\u9501\u4e86\u6216\u7531\u4e8e\u5176\u5b83\u539f\u56e0\u6302\u8d77\u4e86\u3002\u5728\u90a3\u6837\u7684\u60c5\u51b5\u4e0b\u7528 jstack \u5de5\u5177\u6765\u83b7\u53d6\u7ebf\u7a0b\u8f6c\u50a8\u3002jstack  -F  pid<\/code> \u9009\u9879\u6765\u5f3a\u5236\u6302\u8d77\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u8f6c\u50a8\u3002\u8fd9\u4e5f\u53ef\u4ee5\u7528\u4e8e\u4e8e\u7a0b\u5e8f\u4e0d\u80fd\u8bbf\u95ee\u6216\u8f93\u51fa\u88ab\u91cd\u5b9a\u5411\u5230\u672a\u77e5\u5730\u65b9\u3002<\/p>\n
\u5728 jstack \u7684\u8f93\u51fa\u91cc\uff0c\u68c0\u67e5\u6bcf\u4e2a\u5904\u4e8e BLOCKED<\/code> \u72b6\u6001\u7684\u7ebf\u7a0b\u3002\u9876\u5c42\u5e27\u6709\u65f6\u80fd\u6307\u793a\u7ebf\u7a0b\u4e3a\u4ec0\u4e48\u88ab\u963b\u585e\u4e86\uff0c\u4f8b\u5982 Object.wait<\/code> \u6216 Thread.sleep<\/code> \u3002\u6808\u7684\u5176\u4f59\u90e8\u5206\u5c06\u7ed9\u51fa\u7ebf\u7a0b\u6b63\u5728\u505a\u4ec0\u4e48\u3002\u7279\u522b\u662f\u6e90\u7801\u88ab\u7f16\u8bd1\u4e86\u884c\u53f7\u4fe1\u606f\uff0c\u4f60\u53ef\u4ee5\u4ea4\u53c9\u5f15\u7528\u6e90\u4ee3\u7801\u3002<\/p>\n
\u5982\u679c\u7ebf\u7a0b\u5904\u4e8e BLOCKED<\/code> \u72b6\u6001\u4e14\u7406\u7531\u4e0d\u660e\u663e\uff0c\u7528 -m<\/code> \u9009\u9879\u6765\u83b7\u53d6\u4e00\u4e2a\u6df7\u5408\u6808\u3002\u5728\u6df7\u5408\u6808\u7684\u8f93\u51fa\u91cc\uff0c\u4f60\u5e94\u8be5\u53ef\u4ee5\u786e\u5b9a\u7ebf\u7a0b\u4e3a\u4ec0\u4e48\u88ab\u963b\u585e\u4e86\u3002\u5982\u679c\u7ebf\u7a0b\u56e0\u4e3a\u5c1d\u8bd5\u8fdb\u5165\u540c\u6b65\u65b9\u6cd5\u6216\u5757\u800c\u963b\u585e\uff0c\u4f60\u5c06\u5728\u9876\u5c42\u5e27\u9644\u8fd1\u770b\u5230\u7c7b\u4f3c ObjectMonitor::enter<\/code> \u7684\u5e27\u3002\u4e3e\u4f8b\uff1a<\/p>\n
----------------- t@13 -----------------\n0xff31e8b8      ___lwp_cond_wait + 0x4\n0xfea8c810      void ObjectMonitor::EnterI(Thread*) + 0x2b8\n0xfeac86b8      void ObjectMonitor::enter2(Thread*) + 0x250\n:\n\n<\/code><\/pre>\n
\u5904\u4e8e RUNNABLE<\/code> \u72b6\u6001\u7684\u7ebf\u7a0b\u4e5f\u53ef\u80fd\u963b\u585e\u3002\u6df7\u5408\u6808\u91cc\u7684\u9876\u5c42\u5e27\u5e94\u5f53\u6307\u793a\u7ebf\u7a0b\u6b63\u5728\u505a\u4ec0\u4e48\u3002<\/p>\n
\u4e00\u4e2a\u9700\u8981\u68c0\u67e5\u7684\u7279\u5b9a\u7ebf\u7a0b\u662f VMThread<\/code>\u3002\u8fd9\u4e2a\u7279\u5b9a\u7ebf\u7a0b\u7528\u4e8e\u6267\u884c\u50cf\u5783\u573e\u56de\u6536\u7684\u52a8\u4f5c\u3002\u5b83\u53ef\u4ee5\u901a\u8fc7\u7ebf\u7a0b\u7684\u521d\u59cb\u6808\u662f\u5426\u6b63\u5728\u6267\u884c VMThread::run()<\/code> \u6765\u9274\u522b\u3002\u5728Solaris OS\u4e0a\u5178\u578b\u7684\u662f t@4<\/code>\uff0c\u5728Linux\u4e0a\u662f\u7528 C++ mangled\u540d\u5b57 _ZN8VMThread4loopEv<\/code> \u3002<\/p>\n
\u901a\u5e38\uff0c\u4f60\u53ef\u4ee5\u4ece\u547d\u4ee4\u884c\u6267\u884c\u7a0b\u5e8f\uff0c\u4f60\u53ef\u4ee5\u5f97\u5230VM\u4e0d\u54cd\u5e94 Ctrl-\\<\/code> \u6216 Ctrl-Break<\/code> \u7684\u72b6\u6001\uff0c\u5f88\u53ef\u80fd\u662f\u4f60\u63ed\u9732\u4e86\u4e00\u4e2aVM bug\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u5e93\u95ee\u9898issue\uff0c\u6216\u5176\u4ed6\u5e93\u7684bug\u3002\u5982\u679c\u8fd9\u4e2a\u53d1\u751f\uff0c\u83b7\u53d6\u4e00\u4e2a\u5d29\u6e83\u8f6c\u50a8\uff0c\u5c3d\u53ef\u80fd\u591a\u5730\u6536\u96c6\u4fe1\u606f\uff0c\u63d0\u4ea4bug\u62a5\u544a\u6216\u652f\u6301\u7535\u8bdd\u3002<\/p>\n
\u5728\u6302\u8d77\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u8981\u63d0\u53ca\u7684\u53e6\u4e00\u4e2a\u5de5\u5177\u662fSolaris OS \u7684 pstack \u5de5\u5177\u3002Linux\u4e0a\u4e0e pstack<\/code> \u7b49\u4ef7\u7684\u5de5\u5177\u662f lsstack<\/code>\u3002\u5728\u5199\u8fd9\u7bc7\u6587\u6863\u65f6 lsstack<\/code> \u53ea\u80fd\u62a5\u544a\u672c\u5730\u6808\u5e27\u3002<\/p>\n
TODO\u3002<\/p>\n
5.3 Solaris 8 OS \u7ebf\u7a0b\u5e93<\/h2>\n
TODO<\/p>\n\n
\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u7ae0\u4e3a\u6302\u8d77\u6216\u5faa\u73af\u8fdb\u7a0b\u7684\u6545\u969c\u6392\u9664\u5728\u7279\u5b9a\u7a0b\u5e8f\u4e0a\u63d0\u4f9b\u4e86\u4fe1\u606f\u548c\u6307\u5bfc\u3002 \u95ee\u9898\u5728\u6d89\u53ca\u6302\u8d77\u6216\u5faa … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[231,233,166],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/921"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=921"}],"version-history":[{"count":2,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/921\/revisions"}],"predecessor-version":[{"id":925,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/921\/revisions\/925"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}