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https://issues.apache.org/jira/browse/JCR-769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12480812
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Claus Köll commented on JCR-769:
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I have not sayed that i have fixed the problem only with the fact of changing 
the mapping between xid's and TransactionContexts.
I thought that the semantic of joining XAResources to Global Transaction is 
better then the one it is now.
For me its clear that the process is not easy and maybe a long term but
if you think its is not importand to identify the problems, ok let it be.




> 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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