Since I moved to Mercurial plugin 1.20 I get this in the glassfish log and jobs
aren't scheduled:

[#|2009-09-23T03:09:31.294-0700|SEVERE|sun-appserver2.1|hudson.triggers.SCMTrigger|_ThreadID=19;_ThreadName=SCM
polling for
hudson.matrix.MatrixProject@9c8ce3[AuthoringTool-Continuous];_RequestID=c05bb485-d240-4f72-8b67-e9e2ec8bb5eb;|Failed
to record SCM polling
java.lang.NoSuchFieldError: HOURS
at hudson.plugins.mercurial.MercurialSCM.pollChanges(MercurialSCM.java:192)
at hudson.model.AbstractProject.pollSCMChanges(AbstractProject.java:1033)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:317)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:344)
at
hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:114)
at java.util.concurrent.Executors$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:651)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)
at java.lang.Thread.run(Thread.java:613)

I thought at first it was coming from the fact I was using Hudson war 1.323 and
possibly the Mercurial plug-in was requiring Hudson war 1.324.
I moved to Hudson 1.324, not better.
Now I moved to Mercurial plug-in 1.21, not better.
Any idea ?