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From "Antonio Sanso (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KATO-14) Provide new threads dump writer in order to be compatible with common thread analyzers
Date Sun, 10 Jul 2011 17:47:59 GMT
Provide new threads dump writer in order to be compatible with common thread analyzers
--------------------------------------------------------------------------------------

                 Key: KATO-14
                 URL: https://issues.apache.org/jira/browse/KATO-14
             Project: Kato
          Issue Type: New Feature
          Components: API
            Reporter: Antonio Sanso


At the moment Kato has an XMLDumpWriter that produces an xml file containing all the threads
information. This is not compatible with most of the standard threads dump analyzers (e.g.
TDA [0], samuray) that expect a file that has a format like:

""http-bio-8080"-exec-64" daemon prio=5 tid=0x0000000115817000 nid=0x118650000 waiting on
condition [0x000000011864f000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000001075ba0b8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
	at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
	at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:104)
	at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:32)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
	at java.lang.Thread.run(Thread.java:637)

This is the output produced from tools like jstack or doing kill -QUIT <pid>.
I'll provide a patch containing a StackDumpWriter providing an output compatible with those
threads analyzers.

[0] http://www.jroller.com/dumpster/entry/tda_as_jconsole_plugin



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