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From "Mike Matrigali (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5692) intermittent test failure in storetests/st_derby715.java
Date Wed, 18 Apr 2012 15:09:42 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13256630#comment-13256630
] 

Mike Matrigali commented on DERBY-5692:
---------------------------------------

without a reliable repro hard to say what is going on, which is why I suggested running just
that test/suite to see if it pops
easily in that environment.   I am just guessing at why it happens on that platform and not
others.  I think the way the locking
code works we don't really know why we have woken up when we sleep waiting for a lock.   If
we have not gotten the lock then
we check how long we have waited and if it is under timeout we do the dealock check.

Yes I am suggesting the kind of change you have, but would see how much longer if at all the
storetests suite takes with
it.  I don't know how many expected lock timeouts, if any the suite has.
                
> intermittent test failure in storetests/st_derby715.java
> --------------------------------------------------------
>
>                 Key: DERBY-5692
>                 URL: https://issues.apache.org/jira/browse/DERBY-5692
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.8.2.3
>         Environment: Windows 2008, 4 CPU, ibm 1.4.2.
>            Reporter: Myrna van Lunteren
>            Priority: Minor
>
> I am seeing an irregularly occurring failure with ibm 1.4.2 on one machine - which happens
to be the only 4 CPU machine and the only one running Windows 2008...And I've got 10.8 nightly
tests running on it.
> I have not seen this with other jvms on the same machine.
> It's possible this would also happen on trunk, but we stopped supporting 1.4.2 with trunk
and so I do not run tests against trunk with (ibm) 1.4.2.
> When the test passes, the output contains 5 identical lines 'Got a Deadlock'.
> The test failures are of 2 kinds:
> - 1 (or more?) of the 'Got a Deadlock' lines is missing
> - we get a '40XL1' error (timeout) instead of a deadlock.
> As the second situation seems to match what DERBY-715 was about, I thought it worthwhile
reporting as a separate JIRA. We should check it's not somehow a regression.

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