利用weblogic.Admin以及WLST进行thread dump

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weblogic threadDump Dump

1、weblogic816

C:\Documents and Settings\tony>java -cp E:\bea816\weblogic81\server\lib\weblogic.jar weblogic.Admin -url localhost:7001 -username weblogic -password weblogic THREAD_DUMP

Thread Dump has been printed to the servers standard out (by default, the shell
in which the server is running).

可以看到打印成功！

但是在9版本并不能使用该方法

2、weblogic923

启动server,打开wlst.cmd

连接到启动的AdminServer
Connect(‘weblogic’,’weblogic’,’t3://127.0.0.1:7001’)

threadDump()

可以看到写到了一个叫Thread_Dump_AdminServer.txt的文件里(该文件存在wlst.cmd这个脚本同样的目录里，如E:\bea\weblogic92\common\bin\)。

再次运行threadDump(),将会覆盖该文件。

因为目前是只启动了一个server,所以在进行dump的时候并没指定server，默认就对admin做了dump.

再启动一个server1.现在再次用不指定server的threadDump()仍旧只会产生admin的dump.
利用help命令，发现还有一个指定server的dump方法。
threadDump([writeToFile], [fileName], [serverName])
注意里面有个属性是是否写到文件，我这里是true.所以生成了dump文件.

3、weblogic10.0 for solarisx86

在soalris10上(weblogic10.0)操作wlst工具来进行线程堆栈成功。

wls:/mydomain/serverConfig> threadDump(writeToFile='true', fileName='/opt/bea10/threaddump1.txt')

......................
........................
.......................

"Reference Handler" waiting for lock java.lang.ref.Reference$[email=Lock@c2bce4]Lock@c2bce4[/email] WAITING
      java.lang.Object.wait(Native Method)
      java.lang.Object.wait(Object.java:474)
      java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)

"main" waiting for lock [email=weblogic.t3.srvr.T3Srvr@ff2b7c]weblogic.t3.srvr.T3Srvr@ff2b7c[/email] WAITING
      java.lang.Object.wait(Native Method)
      java.lang.Object.wait(Object.java:474)
      weblogic.t3.srvr.T3Srvr.waitForDeath(T3Srvr.java:747)
      weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:396)
      weblogic.Server.main(Server.java:67)

The Thread Dump for server AdminServer
has been successfully written to /opt/bea10/threaddump1.txt

利用py文件来生成thread dump

(1).在已经进入了wlst的环境下
wls:/testDomain/serverConfig> execfile('/opt/bea10/user_projects/domains/testDomain/bin/threaddumpadmin.py')

Connecting to t3://192.168.0.55:7001 with userid weblogic ...
Successfully connected to Admin Server 'AdminServer' that belongs to domain 'testDomain'.

Warning: An insecure protocol was used to connect to the
server. To ensure on-the-wire security, the SSL port or
Admin port should be used instead.

Thread dump for the running server: AdminServer
"[ACTIVE] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'" RUNNABLE
      sun.management.ThreadImpl.getThreadInfo0(Native Method)
      sun.management.ThreadImpl.getThreadInfo(ThreadImpl.java:142)
      weblogic.platform.VM15.threadDumpAsString(VM15.java:22)
....................
The Thread Dump for server AdminServer
has been successfully written to /opt/bea10/threaddump2.txt

Exiting WebLogic Scripting Tool.

(2).没有进入wlst的情况
-bash-3.00# java -cp /opt/bea10/wlserver_10.0/server/lib/weblogic.jar weblogic.WLST threaddumpadmin.py

Initializing WebLogic Scripting Tool (WLST) ...

Welcome to WebLogic Server Administration Scripting Shell

Type help() for help on available commands

Connecting to t3://192.168.0.55:7001 with userid weblogic ...
Successfully connected to Admin Server 'AdminServer' that belongs to domain 'testDomain'.

Warning: An insecure protocol was used to connect to the
server. To ensure on-the-wire security, the SSL port or
Admin port should be used instead.

Thread dump for the running server: AdminServer
"[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'" waiting for lock [email=weblogic.work.ExecuteThread@18a290f]weblogic.work.ExecuteThread@18a290f[/email] WAITING
      java.lang.Object.wait(Native Method)

....................

The Thread Dump for server AdminServer
has been successfully written to /opt/bea10/threaddump2.txt

Exiting WebLogic Scripting Tool.

下面是 threaddumpadmin.py的内容：
connect('weblogic','weblogic','t3://192.168.0.55:7001')
threadDump(writeToFile='true', fileName='/opt/bea10/threaddump3.txt')
exit()

注：

WLS816利用weblogic.Admin生成thread_dump，仅支持的SUN与JRockit，因为它是使用bea提供的native jvm hook生成的，对于HP或IBM的JDK它是不支持的。
进行thread dump，在unix环境下，最保险的办法是kill -3。因为无论是weblogic.Admin还是wslt，它都是在目标jvm之外的，如果碰到一些特别的场景，如线程耗尽那些，可能这些命令不能正常工作。

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