See following logs:

Started by an SCM change
Building on master
[workspace] $ cleartool desc -fmt %[found_bls]p\n stream:MARTIN_1.0_dev@\ice_p
cleartool: Error: Not a vob object: "7eb79fb9.6465497a.8233.68:17:2d:bb:b1:c8".
MARTIN_1.0_02_07_2010_AfterDelivery
[workspace] $ cleartool desc -fmt %[component]p\n baseline:cleartool:@\ice_p
cleartool: Error: Baseline not found: "cleartool:".
FATAL: UCM ClearCase failed. exit code=1
java.io.IOException: cleartool did not return the expected exit code. Command line="desc -fmt %[component]p\n baseline:cleartool:@\ice_p", 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:88)
at hudson.plugins.clearcase.ucm.UcmCommon.getBaselinesDesc(UcmCommon.java:197)
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.AbstractClearCaseScm.checkout(AbstractClearCaseScm.java:457)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1038)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
at hudson.model.Run.run(Run.java:1257)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:318)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:129)

If there is a clearcase problem, the plugin parse the cleartool error as result and failed ("cleartool:" is not a good baseline).

See attachment for a fix.