We have been seeing intermittent problems where a job will hang either during AccuRev polling, at the beginning of job execution (after "Workspace purged. Setting ACCUREV_HOME to "/data/jenkins/workspace"), or during code checkout. Sometimes the job can be cancelled and re-executed, other times, nothing short of a Jenkins restart will fix it. We see this most often on slaves, although we have seen it once or twice on the master. Not sure if this is related to JENKINS-5413 or not.