kamalakannan wrote:

  I have mailman 2.1.9, some of the mails stuck in shunt folder. 

these mails are not delivered even after using unshunt command.

That's because unshunt requeues the message in it's original queue, and the same error occurs again because you haven't fixed the underlying problem that causes the shunting in the first place.

Below are the errors in mailman log.

Feb 14 13:36:46 2007 (1196) SHUNTING: 1171438347.6975739+4557e8bc5545704d99fed8f512cd2de377b05e2e Feb 14 13:36:47 2007 (1196) Uncaught runner exception: unpickling stack underflow Feb 14 13:36:47 2007 (1196) Traceback (most recent call last): File "/list/mailman/Mailman/Queue/Runner.py", line 112, in _oneloop self._onefile(msg, msgdata) File "/list/mailman/Mailman/Queue/Runner.py", line 170, in _onefile keepqueued = self._dispose(mlist, msg, msgdata) File "/list/mailman/Mailman/Queue/ArchRunner.py", line 73, in _dispose mlist.ArchiveMail(msg) File "/list/mailman/Mailman/Archiver/Archiver.py", line 215, in ArchiveMail h = HyperArch.HyperArchive(self) File "/list/mailman/Mailman/Archiver/HyperArch.py", line 641, in __init__ self.__super_init(dir, reload=1, database=db) File "/list/mailman/Mailman/Archiver/pipermail.py", line 300, in __init__ d = pickle.load(f) UnpicklingError: unpickling stack underflow

The underlying problem appears to be a corrupt pickle for the list's archive. This is the file archives/private/<listname>/pipermail.pck.

I'm guessing this is only happening for one list. If you don't know which list, you can dump a shunt queue entry with bin/dumpdb and get the listname from the metadata.

BTW, this only affects archiving. The posts were delivered when originally processed. Also, the posts were added to the archives/private/<listname>.mbox/<listname>.mbox file before this error ocurred, so I think the easiest solution (assuming the archives/private/<listname>.mbox/<listname>.mbox has not been previously pruned) is to

1. rebuild the archive with bin/arch --wipe <listname>
2. examine the shunt queue entries with bin/dumpdb or bin/show_qfiles and verify they are in the rebuilt archive.
3. remove the unneeded shunt queue entries.

-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan