如何分析java Thread DUMP

sinaID10281發表於2014-01-13
原文網址 : http://jdon.com/46069
Javathread
如何分析java Thread dump檔案，從而找到問題的根源，以下面資訊為例子：

是否為正常的日誌資訊，因為鎖是正常釋放的？？

"ExecuteThread: '17' for queue: 'JMS.TimerClientPool'" id=139 idx=0x250 tid=321304 prio=5 alive, in native, waiting, daemon
-- Waiting for notification on: weblogic/kernel/ExecuteThread@[author]0x1e2615d0[/author][fat lock]
at jrockit/vm/Threads.waitForNotifySignal(JLjava/lang/Object;)Z(Native Method)
at java/lang/Object.wait(J)V(Native Method)
at java/lang/Object.wait(Object.java:429)
at weblogic/kernel/ExecuteThread.waitForRequest(ExecuteThread.java:154)
^-- Lock released while waiting: weblogic/kernel/ExecuteThread@[author]0x1e2615d0[/author][fat lock]
at weblogic/kernel/ExecuteThread.run(ExecuteThread.java:174)
at jrockit/vm/RNI.c2java(IIIII)V(Native Method)
-- end of trace
下面的又是該如何分析？


從dump日誌中可以看到執行緒是阻塞的狀態，等待獲取 java/lang/String@[author][author][author]0x12442b88[/author][/author][/author]

但是該鎖具體是哪個如何分析？


"ExecuteThread: '2' for queue: 'weblogic.socket.Muxer'" id=93 idx=0x198 tid=320415 prio=5 alive, in native, blocked, daemon
-- Blocked trying to get lock: java/lang/String@[author][author][author]0x12442b88[/author][/author][/author][fat lock]
at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method)
at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1630)
at jrockit/vm/Locks.fatLockReacquire(Locks.java:1865)
at jrockit/vm/Locks.lockFat(Locks.java:1736)
at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1277)
at jrockit/vm/Locks.monitorEnter(Locks.java:2389)
at weblogic/socket/PosixSocketMuxer.processSockets(PosixSocketMuxer.java:91)
at weblogic/socket/SocketReaderRequest.execute(SocketReaderRequest.java:32)
at weblogic/kernel/ExecuteThread.execute(ExecuteThread.java:224)
at weblogic/kernel/ExecuteThread.run(ExecuteThread.java:183)
at jrockit/vm/RNI.c2java(IIIII)V(Native Method)
-- end of trace

Blocked lock chains

===================
Chain 2:
"ExecuteThread: '1' for queue: 'weblogic.socket.Muxer'" id=92 idx=0x194 tid=320414 waiting for java/lang/String@[author][author][author]0x12442b88[/author][/author][/author] held by:
"ExecuteThread: '2' for queue: 'weblogic.socket.Muxer'" id=93 idx=0x198 tid=320415 in chain 1


Open lock chains
================
Chain 1:
"ExecuteThread: '0' for queue: 'weblogic.socket.Muxer'" id=91 idx=0x190 tid=320413 waiting for java/lang/String@[author][author][author]0x12442b88[/author][/author][/author] held by:
"ExecuteThread: '2' for queue: 'weblogic.socket.Muxer'" id=93 idx=0x198 tid=320415 (active)

謝謝！

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