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From "Simone Tripodi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FELIX-5024) "waiting to lock" message serializes "null" when there is no owner thread
Date Wed, 02 Sep 2015 09:55:45 GMT

     [ https://issues.apache.org/jira/browse/FELIX-5024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Simone Tripodi updated FELIX-5024:
----------------------------------
    Attachment: FELIX-5024.patch

Proposed patch fixes the issue simply by checking the owner ID inside the message format,
it skips the owner details rendering if there is no owner

> "waiting to lock" message serializes "null" when there is no owner thread
> -------------------------------------------------------------------------
>
>                 Key: FELIX-5024
>                 URL: https://issues.apache.org/jira/browse/FELIX-5024
>             Project: Felix
>          Issue Type: Bug
>          Components: Thread Dumper
>    Affects Versions: threaddump-1.0.0
>            Reporter: Simone Tripodi
>             Fix For: threaddump-1.0.2
>
>         Attachments: FELIX-5024.patch
>
>
> It happen that the {{waiting to lock}} message renders a _null_ string when there is
no owner thread, it must be removed
> {noformat}
> "mythread-323" prio=5 tid=0x143 nid=0xffffffff timed_waiting
>    java.lang.Thread.State: TIMED_WAITING
>         at sun.misc.Unsafe.park(Native Method)
>         - waiting to lock <0x406249f1> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
owned by "null" tid=0x-1
>         at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)
>         at org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:389)
>         at org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:531)
>         at org.eclipse.jetty.util.thread.QueuedThreadPool.access$700(QueuedThreadPool.java:47)
>         at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:590)
>         at java.lang.Thread.run(Thread.java:722)
> {noformat}



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