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From "Martin Centner (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCR-3425) XAAwareRWLock implementation fails with IllegalStateException on JBoss AS7
Date Wed, 12 Sep 2012 12:21:07 GMT
Martin Centner created JCR-3425:
-----------------------------------

             Summary: 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-jca
    Affects Versions: 2.4.3
         Environment: JBoss AS7 7.1.1.Final
            Reporter: Martin Centner


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)
[jackrabbit-core-2.4.3.jar:2.4.3]
...

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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