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https://issues.jenkins-ci.org/browse/JENKINS-12987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
SCM/JIRA link daemon resolved JENKINS-12987.
--------------------------------------------
Resolution: Fixed
> Concurrent Modification Exception for CVS
> -----------------------------------------
>
> Key: JENKINS-12987
> URL: https://issues.jenkins-ci.org/browse/JENKINS-12987
> Project: Jenkins
> Issue Type: Bug
> Components: core, cvs
> Affects Versions: current
> Environment: CentOS 6.0 Master, CentOS 5.5 slave, CVS
> Reporter: Sagar Khushalani
> Priority: Blocker
> Labels: jenkins
>
> CVS polling fails on some projects with the following exception (following is
> in the CVS Polling Log):
> {noformat}
> ERROR: Failed to record SCM polling
> java.util.ConcurrentModificationException
> at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:782)
> at java.util.ArrayList$Itr.next(ArrayList.java:754)
> at hudson.scm.CVSSCM.compareRemoteRevisionWith(CVSSCM.java:356)
> at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:356)
> at hudson.scm.SCM.poll(SCM.java:373)
> at hudson.model.AbstractProject.poll(AbstractProject.java:1323)
> at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:420)
> at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:449)
> at
> hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:636)
> {noformat}
> This causes the polling to fail, and the project to not find any differences,
> therefore not build on update.
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