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From "Unico Hommes (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JCR-3425) XAAwareRWLock implementation fails with IllegalStateException on JBoss AS7
Date Thu, 27 Sep 2012 12:28:07 GMT

    [ https://issues.apache.org/jira/browse/JCR-3425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13464660#comment-13464660

Unico Hommes commented on JCR-3425:

Backported to branch 2.2 in revision 1390964.
> XAAwareRWLock implementation fails with IllegalStateException on JBoss AS7
> --------------------------------------------------------------------------
>                 Key: JCR-3425
>                 URL: https://issues.apache.org/jira/browse/JCR-3425
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core, transactions
>    Affects Versions: 2.4.3, 2.5.1
>         Environment: JBoss AS7 7.1.1.Final
>            Reporter: Martin Centner
>            Assignee: Claus Köll
>             Fix For: 2.2.13, 2.4.4, 2.5.3
>         Attachments: JCR-3425.patch
> The class XAAwareRWLock uses a HashMap readers_. The static function TransactionContext.getCurrentThreadId()
is used to obtain an object currentId used as key in for the HashMap. When running under a
transaction the currentId is set to Xid.getGlobalTransactionId which returns a byte[]. 
> However, the class org.jboss.jca.core.spi.transaction.xa.XidWrapper.getGlobalTransactionId()
returns globalTransactionId.clone() - it returns a new instance of byte[] on every invocation
and the hashCode of the byte[] changes. Therefore, readers_.get(currentId) returns null for
the second invocation in the same transaction and the result ist an IllegalStateTransaction:
>  java.lang.IllegalStateException
> 	at org.apache.jackrabbit.core.version.VersioningLock$XAAwareRWLock.endRead(VersioningLock.java:167)
> ...
> I suggest using a wrapper for the globalTransactionId byte[] that computes the hashCode
on the contents of the byte instead of the object identity.

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