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From "Mike Matrigali (JIRA)" <derby-...@db.apache.org>
Subject [jira] Resolved: (DERBY-715) lock deadlocks sometimes reported as lock timeouts
Date Fri, 02 Dec 2005 00:53:31 GMT
     [ http://issues.apache.org/jira/browse/DERBY-715?page=all ]
Mike Matrigali resolved DERBY-715:

    Resolution: Fixed

submitted to trunk as revision 351543.

Sometimes (timing dependent) a lock deadlock was incorrectly returned to the
user as a lock timeout.  The code in LockSet was using the wrong variable
to determine if a deadlock had been detected, that variable sometimes was
right and sometimes wrong.  Changed all the code to use the direct return
from the deadlock detection routine.  Added a test that causes 5 deadlocks,
previous to the fix this test would always report at least 1 timeout on
my single processor, windows xp, laptop.

> lock deadlocks sometimes reported as lock timeouts
> --------------------------------------------------
>          Key: DERBY-715
>          URL: http://issues.apache.org/jira/browse/DERBY-715
>      Project: Derby
>         Type: Bug
>   Components: Services
>     Versions:
>     Reporter: Mike Matrigali
>     Assignee: Mike Matrigali
>     Priority: Minor
>      Fix For:
>  Attachments: repro.java
> Sometimes a lock deadlock is reported as a lock timeout, even when the software has done
a deadlock search and found it to be a deadlock.

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