funkies with importd locks on galapagos

[Steve McInerney]

Traceback (most recent call last):
          File "/srv/importd.launchpad.net/production/launchpad/cronscripts/code-import-dispatcher.py", line 46, in <module>
            script.lock_and_run()
          File "/srv/importd.launchpad.net/production/launchpad-rev-9072/lib/lp/services/scripts/base.py", line 292, in lock_and_run
            self.unlock(skip_delete=skip_delete)
          File "/srv/importd.launchpad.net/production/launchpad-rev-9072/lib/lp/services/scripts/base.py", line 232, in unlock
            self.lock.release(skip_delete=skip_delete)
          File "/srv/importd.launchpad.net/production/launchpad-rev-9072/lib/contrib/glock.py", line 218, in release
            os.unlink(self.fpath)
        OSError: [Errno 2] No such file or directory: '/var/lock/launchpad-codeimportdispatcher.lock'

<mwhudson> spm: they seem to correlate with
<mwhudson> 2010-04-19 00:07:37 WARNING Stale lockfile detected and claimed.
<mwhudson> lines in the log
<mwhudson> the subsequent error would suggest that the lockfile is in fact not stale...

These are very irregular.
Hrm. They *may* correlate with periods of high load. One to chase...