[jboss-jira] [JBoss JIRA] Commented: (JBAS-5163) Add JDK 6 version of ServerInfo.listThreadDump() taking advantage of new management classes

[Galder Zamarreno (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBAS-5163?page=comments#action_12404595 ] 
            
Galder Zamarreno commented on JBAS-5163:
----------------------------------------

One of the aims of this JIRA is that whatever output is produced 
can be parsed by either TDA or Samurai, which are two of the 
most used thread dump analysing tools.

> Add JDK 6 version of ServerInfo.listThreadDump() taking advantage of new management classes
> -------------------------------------------------------------------------------------------
>
>                 Key: JBAS-5163
>                 URL: http://jira.jboss.com/jira/browse/JBAS-5163
>             Project: JBoss Application Server
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: JMX, Management services, System service
>    Affects Versions:  JBossAS-5.0.0.Beta3, JBossAS-4.2.2.GA
>            Reporter: Galder Zamarreno
>         Assigned To: Galder Zamarreno
>            Priority: Minor
>             Fix For: JBossAS-5.0.1.CR1
>
>         Attachments: jmx-serverinfo.dump, kill-3.dump
>
>
> There're 4 ways to generate a thread dump. I have taken the output from the same run with 
> different methods:
> 1.- kill -3. Can be parsed by tools like https://tda.dev.java.net/ (simply, one of the most useful 
> tools I've found out there!). Example:
> "JBossLifeThread" prio=1 tid=0x0a690cc0 nid=0x1741 in Object.wait() [0x867f2000..0x867f30b0]
>         at java.lang.Object.wait(Native Method)
>         - waiting on <0x9247e200> (a java.lang.Object)
>         at java.lang.Object.wait(Object.java:474)
>         at org.jboss.system.server.ServerImpl$LifeThread.run(ServerImpl.java:940)
>         - locked <0x9247e200> (a java.lang.Object)	
> 2.- JMX via org.jboss.system.server.ServerInfo.listThreadDump(). Here's some output:
> Thread: JBossLifeThread : priority:5, demon:false, threadId:58, threadState:WAITING, lockName:java.l
> ang.Object at 10cff6b
> java.lang.Object.wait(Native Method)
> java.lang.Object.wait(Object.java:474)
> org.jboss.system.server.ServerImpl$LifeThread.run(ServerImpl.java:940)	
> Lock name is different to lock monitor achieved via kill -3. Doesn't looks like it prints previously locked 
> monitors. Cannot be parsed by TDA tools because it's in JBoss specific format. 
> 3.- Thread.getAllStackTraces().
> Haven't tested the output from this. What would this print? Couldn't find an MBean that uses/parses 
> the output from this, but I suspect it's the same as method 2, specially since 
> http://jira.jboss.com/jira/browse/JBAS-1448 has already been fixed.
> 4.- JConsole Threads view:
> Code:
> Name: JBossLifeThread
> State: WAITING on java.lang.Object at 10cff6b
> Total blocked: 0  Total waited: 1
> Stack trace: 
> java.lang.Object.wait(Native Method)
> java.lang.Object.wait(Object.java:474)
> org.jboss.system.server.ServerImpl$LifeThread.run(ServerImpl.java:940)	
> Seems to print same info as JBoss' ServerInfo.
> Bottom line: we should try generating thread dumps that look like kill -3 
> output to make them more readable than in their current format and to 
> benefit from existing tools that can parse standard kill -3 format.

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