When a Project poll SCM (CVS) cause of changes,
a exception will be triggered

ERROR: Failed to record SCM polling for hudson.model.FreeStyleProject@44d044d[iUp]
java.util.ConcurrentModificationException
at java.util.AbstractList$SimpleListIterator.next(AbstractList.java:64)
at hudson.scm.AbstractCvs.compareRemoteRevisionWith(AbstractCvs.java:469)
at hudson.scm.CVSSCM.compareRemoteRevisionWith(CVSSCM.java:224)
at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:356)
at hudson.scm.SCM.poll(SCM.java:373)
at hudson.model.AbstractProject._poll(AbstractProject.java:1548)
at hudson.model.AbstractProject.poll(AbstractProject.java:1473)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:439)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:468)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:450)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
at java.util.concurrent.FutureTask.run(FutureTask.java:149)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:908)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:931)
at java.lang.Thread.run(Thread.java:738)

I'm using Jenkins version 1.525