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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3235) TestDoubleBarrelLRUCache hangs under Java 1.5, 3.x and trunk, likely JVM bug
Date Fri, 24 Jun 2011 10:58:48 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054362#comment-13054362
] 

Michael McCandless commented on LUCENE-3235:
--------------------------------------------

Yes the stack looks just like the stack overflow link I posted -- several threads stuck in
sun.misc.Unsafe.park ;)

java -Xint definitely does not hang... ran for like 4200 iterations.

> TestDoubleBarrelLRUCache hangs under Java 1.5, 3.x and trunk, likely JVM bug
> ----------------------------------------------------------------------------
>
>                 Key: LUCENE-3235
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3235
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Michael McCandless
>
> Not sure what's going on yet... but under Java 1.6 it seems not to hang bug under Java
1.5 hangs fairly easily, on Linux.  Java is 1.5.0_22.
> I suspect this is relevant: http://stackoverflow.com/questions/3292577/is-it-possible-for-concurrenthashmap-to-deadlock
which refers to this JVM bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6865591 which
then refers to this one http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6822370
> It looks like that last bug was fixed in Java 1.6 but not 1.5.

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