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https://issues.apache.org/jira/browse/JCR-769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12480788
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Dominique Pfister commented on JCR-769:
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As you correctly identified, if there are two sessions (or branches) involved
in the same transaction, let's say TX1B1 and TX2B2, the sequence of calls:
TX1B1.prepare
TX1B2.prepare
TX1B1.commit
TX1B2.commit
willl timeout in the call to TX1B2.prepare. But fixing the problem is not
simply a matter of replacing the exclusive lock obtained in TX1B1.prepare with
a more "concurrency-friendy" one, but one would have to eventually merge the
changes in TX1B1 and TX2B2 and detect potential conflicts, which is far more
complicated and currently not implemented.
In other words: this bug is absolutely legitimate, but in your situation one
can work around it.
> Unable to login with two different Credentials to same workspace in one
> Transaction
> -----------------------------------------------------------------------------------
>
> Key: JCR-769
> URL: https://issues.apache.org/jira/browse/JCR-769
> Project: Jackrabbit
> Issue Type: Bug
> Components: jca
> Affects Versions: 1.2.1
> Environment: Websphere 5.1.1 J2C Adapter
> Reporter: Claus Köll
> Attachments: patch.txt, stacktrace.txt
>
>
> I'm using the Jackrabbit 1.2.1 JCA adapter and trying to access in a
> SessionBean-Method with Container Transaction a Workspace with 2 different
> Credentials.
> The Method takes about 400ms to finish but no commit on TransactionContextr
> occurs (Debugging ..) only the prepare was called 2 times .
> The Container hangs on the PostInvoke Method about 5 seconds and then i get a
> "javax.transaction.xa.XAException"
> with the Warn Message: Transaction rolled back because timeout expired
> The code ..
> Context ctx = new InitialContext();
> Repository repository = (Repository) ctx.lookup("java:comp/env/jackrabbit");
> Credentials credentials = new SimpleCredentials("user1",
> "password1".toCharArray());
> Credentials credentials2 = new SimpleCredentials("user2",
> "password2".toCharArray());
> Session session1 = repository.login(credentials, "default");
> Session session2 = repository.login(credentials2, "default");
> Session1 adds a node to the workspace .. and with the session2 i do nothing
> except the login !
> If i make no second login the Method works fine.
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