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oakState0002: Conflicting concurrent change on branch commits

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radhakrishnan72
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radhakrishnan72
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25-01-2018

Hi everyone,

                     As part of regular deliver of the content to different audiences, assets get published to publishers and unpublished from publishers. I have 3 replication queues for 3 categories of the assets so that no blocking or waiting for each other. I am using replication API to replicate specific category assets to specific replication agent. I do process the metadata of the asset before publishing/unpublishing it and when i say resourceResolver.commit(), i am getting below exception and it is so frequent for many assets. If i reprocess these assets, they work fine without any issue. I am not very sure what exactly the issue here.

org.apache.sling.api.resource.PersistenceException: Unable to commit changes to session.

at org.apache.sling.jcr.resource.internal.helper.jcr.JcrResourceProvider.commit(JcrResourceProvider.java:482)

at org.apache.sling.resourceresolver.impl.providers.stateful.AuthenticatedResourceProvider.commit(AuthenticatedResourceProvider.java:215)

at org.apache.sling.resourceresolver.impl.helper.ResourceResolverControl.commit(ResourceResolverControl.java:411)

at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.commit(ResourceResolverImpl.java:1262)

Caused by: javax.jcr.InvalidItemStateException: OakState0002: Conflicting concurrent change on branch commits [r16126faf91f-0-4, r16126fab61d-0-4, r16126f66a91-0-4, ....]

at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:237)

at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:212)

at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.newRepositoryException(SessionDelegate.java:670)

at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.save(SessionDelegate.java:496)

at org.apache.jackrabbit.oak.jcr.session.SessionImpl$8.performVoid(SessionImpl.java:419)

at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.performVoid(SessionDelegate.java:274)

at org.apache.jackrabbit.oak.jcr.session.SessionImpl.save(SessionImpl.java:416)

at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.sling.jcr.base.SessionProxyHandler$SessionProxyInvocationHandler.invoke(SessionProxyHandler.java:116)

at com.sun.proxy.$Proxy7.save(Unknown Source)

at org.apache.sling.jcr.resource.internal.helper.jcr.JcrResourceProvider.commit(JcrResourceProvider.java:480)

... 16 common frames omitted

Caused by: org.apache.jackrabbit.oak.api.CommitFailedException: OakState0002: Conflicting concurrent change on branch commits [r16126faf91f-0-4, r16126fab61d-0-4, r16126f66a91-0-4, ...]

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch$Persisted.checkForConflicts(DocumentNodeStoreBranch.java:654)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch$Persisted.access$400(DocumentNodeStoreBranch.java:529)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch$Persisted$1.call(DocumentNodeStoreBranch.java:589)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch$Persisted$1.call(DocumentNodeStoreBranch.java:586)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch.withCurrentBranch(DocumentNodeStoreBranch.java:307)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch.access$600(DocumentNodeStoreBranch.java:57)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch$Persisted.merge(DocumentNodeStoreBranch.java:586)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch.merge0(DocumentNodeStoreBranch.java:182)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreBranch.merge(DocumentNodeStoreBranch.java:118)

at org.apache.jackrabbit.oak.plugins.document.DocumentRootBuilder.merge(DocumentRootBuilder.java:159)

at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.merge(DocumentNodeStore.java:1653)

at org.apache.jackrabbit.oak.core.MutableRoot.commit(MutableRoot.java:247)

at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.commit(SessionDelegate.java:347)

at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.save(SessionDelegate.java:494)

... 25 common frames omitted

I really appreciate for any suggestion here!

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radhakrishnan72
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26-01-2018

Hi  Jörg Hoh​,

                      thanks for your quick reply here. I set up this log, analyze and update here.

Thanks & Regards,

Radhakrishna.