Going through the Hudson logs I found allot of exception errors that seem to be caused by the ClearCase plug-in. I'm not experiencing any issues at the moment however I waned to point out the errors. The two exceptions below are occurring allot.

Jan 20, 2011 6:01:56 AM hudson.plugins.clearcase.ClearCaseUcmSCM createHistoryAction
SEVERE: IOException when calculating revisions'
java.io.IOException: cleartool did not return the expected exit code. Command line="desc -fmt %[found_bls]Xp\n stream:CU-HUB_Int@/EPL_Projects", actual exit code=1
at hudson.plugins.clearcase.HudsonClearToolLauncher.run(HudsonClearToolLauncher.java:107)
at hudson.plugins.clearcase.HudsonClearToolLauncher.run(HudsonClearToolLauncher.java:70)
at hudson.plugins.clearcase.ClearToolExec.describe(ClearToolExec.java:91)
at hudson.plugins.clearcase.ucm.UcmCommon.getBaselinesDesc(UcmCommon.java:179)
at hudson.plugins.clearcase.ucm.UcmCommon.getFoundationBaselines(UcmCommon.java:174)
at hudson.plugins.clearcase.ClearCaseUcmSCM.createRevisionState(ClearCaseUcmSCM.java:172)
at hudson.plugins.clearcase.ClearCaseUcmSCM.calcRevisionsFromBuild(ClearCaseUcmSCM.java:159)
at hudson.plugins.clearcase.ClearCaseUcmSCM.createHistoryAction(ClearCaseUcmSCM.java:215)
at hudson.plugins.clearcase.AbstractClearCaseScm.compareRemoteRevisionWith(AbstractClearCaseScm.java:540)
at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:354)
at hudson.scm.SCM.poll(SCM.java:371)
at hudson.model.AbstractProject.poll(AbstractProject.java:1289)
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:417)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)

Jan 20, 2011 6:01:55 AM hudson.triggers.SCMTrigger$Runner runPolling
SEVERE: Failed to record SCM polling
java.lang.NullPointerException
at hudson.plugins.clearcase.AbstractClearCaseScm.compareRemoteRevisionWith(AbstractClearCaseScm.java:546)
at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:354)
at hudson.scm.SCM.poll(SCM.java:371)
at hudson.model.AbstractProject.poll(AbstractProject.java:1289)
at hudson.triggers.SCMTrigger$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$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)

Jan 20, 2011 6:01:55 AM hudson.plugins.clearcase.ClearCaseUcmSCM createHistoryAction