Re: [gatein-dev] JCR ConcurrentModificationExceptions with WSRP

Hi, We are seeing occasional ConcurrentModificationException when accessing certain portlets over wsrp. We already have a jira opened for this https://jira.jboss.org/browse/GTNWSRP-84 The strange thing is that we have only been able to reproduce it on linux machines, it doesn't appear to be reproducible on mac machines.

Has anyone seen issues like this before with respect to the jcr and concurrent modifications? Or a jcr expert have a better idea to what the issue is?

It looks like the wsrp jcr layer needs a bit of work to make it more thread safe. > Caused by: java.util.ConcurrentModificationException > at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) > at java.util.AbstractList$Itr.next(AbstractList.java:343) > at org.exoplatform.services.jcr.impl.core.SessionDataManager.validate(SessionDataManager.java:1421) > at org.exoplatform.services.jcr.impl.core.SessionDataManager.commit(SessionDataManager.java:1332) > at org.exoplatform.services.jcr.impl.core.ItemImpl.save(ItemImpl.java:681) > at org.exoplatform.services.jcr.impl.core.SessionImpl.save(SessionImpl.java:935) > at org.gatein.portal.wsrp.state.JCRPersister$WSRPSessionLifeCycle.save(JCRPersister.java:191) > at org.chromattic.core.jcr.SessionWrapperImpl.save(SessionWrapperImpl.java:263) > at org.chromattic.core.DomainSessionImpl._save(DomainSessionImpl.java:583) > at org.chromattic.core.DomainSession.save(DomainSession.java:146) > at org.chromattic.core.api.ChromatticSessionImpl.save(ChromatticSessionImpl.java:223) > at org.gatein.portal.wsrp.state.JCRPersister.closeSession(JCRPersister.java:111) > at org.gatein.portal.wsrp.state.consumer.JCRConsumerRegistry.update(JCRConsumerRegistry.java:116) > at org.gatein.wsrp.consumer.registry.AbstractConsumerRegistry.updateProducerInfo(AbstractConsumerRegistry.java:249)