Two kinds of Thread dumps

[Marcelo Rodriguez]

I recently learned how to read thread dumps, and when I tried to test my knowledge with a production problem, the customer sent me a thread dump with the following format:

 [ACTIVE] ExecuteThread: '106' for queue: 'weblogic.kernel.Default (self-tuning)'" waiting for lock weblogic.work.ExecuteThread@64e815ec WAITING          
            	java.lang.Object.wait(Native Method)          
            	java.lang.Object.wait(Object.java:474)          
            	weblogic.work.ExecuteThread.waitForRequest(ExecuteThread.java:156)          
            	weblogic.work.ExecuteThread.run(ExecuteThread.java:177)

I did not understand anything (where are the monitors? What is the memory address? Who is the current thread? and so on...), I am used to see something like this:

LDAPConnThread-0 ldap://assx94hp:7001" daemon prio=5 tid=0x00773a80 nid=0x63 runnable [511ff000..511ffc30]
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(SocketInputStream.java:129)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
	- locked <0x67fc3080> (a java.io.BufferedInputStream)
	at netscape.ldap.ber.stream.BERElement.getElement(BERElement.java:101)
	at netscape.ldap.LDAPConnThread.run(LDAPConnThread.java:538)
	at java.lang.Thread.run(Thread.java:534)

Was this generated from a specific application server's interface? Is there a way to diagnose the problem with the vague information from the first format ?

thanks in advance,
Marcelo

[Henry Wong]

Weblogic tries to rename the thread, with relevant data, such as the state. Other than that, the rest of the stack trace should be exactly the same -- except the name of the thread changes.

Henry

[Marcelo Rodriguez]

So, are you saying that this is a 'thread dump' generated by weblogic that keep the information more 'simple'?

So, it's a matter of which JVM generated them, right?
I still believe that HotSpot, JRockit and IBM JVMs will produce different outputs/formats in their thread dumps, do you know the difference between them?

Thanks.