JCR Concurrency

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danul

I'm currently experiencing a few issues with concurrency when accessing alfresco via RMI.  Basically i've set up a simple test to throw 10 threads at alfresco and execute some queries.  The result i've been getting however is this:

 [java.lang.RuntimeException: UserTransaction may not be accessed by multiple threads]</br>
java.lang.RuntimeException: UserTransaction may not be accessed by multiple threads
   at org.alfresco.util.transaction.SpringAwareUserTransaction.getTransactionInfo(SpringAwareUserTransaction.java:234)
   at org.alfresco.util.transaction.SpringAwareUserTransaction.rollback(SpringAwareUserTransaction.java:436)
   at org.alfresco.jcr.session.SessionImpl$InnerTransaction.rollback(SessionImpl.java:974)
   at org.alfresco.jcr.session.SessionImpl.logout(SessionImpl.java:654)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 

   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at org.alfresco.jcr.util.JCRProxyFactory$SessionContextInvocationHandler.invoke(JCRProxyFactory.java:130)
   at $Proxy116.logout(Unknown Source)
   at org.apache.jackrabbit.rmi.server.ServerSession.logout(ServerSession.java:229)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
   at sun.rmi.transport.Transport$1.run(Transport.java:153)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
– snip –

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Has anyone encountered anything else like this?  Admittedly the test is very simple and is running off the same user name…

Cheers

Daniel

andy

Hi

Do the threads all have different sessions?

Regards

Andy