I have a Hudson v1.121 instance configured with three jobs. All three
are freestyle projects using maven1 build commands and subversion for
SCM. Two of the jobs poll the SCM every three minutes and also build
periodically at 6am. The third job only builds periodically at
4:30am.

The problem is that one or more of the builds regularly hang in what
seems to be some form of deadlock. Subsequent scheduled builds are
held in "pending" status.

Currently, the two jobs configured with polling are hung from when
they were started at 6am on the 29th. There are also 3 pending
builds, one for each of the three scheduled builds on the 30th.

The consoles for the two hung jobs are empty and this message appeared
in the Winstone stdout (or stderr?) output shortly after they were
started:

Jul 29, 2007 6:01:27 AM hudson.model.Build onStartBuilding
INFO: Waiting for the polling of
hudson.model.FreeStyleProject@4cc72243[NEWMAN] to complete
Jul 29, 2007 6:01:27 AM hudson.model.Build onStartBuilding
INFO: Waiting for the polling of
hudson.model.FreeStyleProject@37b994de[NEWMAN-groovy] to complete

I will attach a thread dump and the console output when I stop one of
the jobs.

Please let me know if I can provide any additional information to
debug this issue.

--Brad