cyrus imap hangs regularly

Ilan Rabinovitch ilan at
Mon Aug 18 14:06:15 EDT 2003


Thanks for pointing me at those docs.  I had it going hourly but I guess
every half hour is the way to go because its improved significantly.

I dont think low memory is the issue.  Free always reports plenty of free
physical ram and swap.  I've been watching the logs closely lately to find
out what kills cyrus and it seems this is the recurring error:
Aug 18 18:49:53 imapd[3695]: DBERROR db4: 241 lockers

Any ideas are greatly appreciated.

Cyrus and lmtpd seem to go to sleep and just not wake up.  This make its
impossible for sendmail to deliver mail from its queue.

Thanks again for you help,

On Tue, Aug 12, 2003 at 04:47:55PM -0400, Rob Siemborski wrote:
> On Tue, 12 Aug 2003, Ilan Rabinovitch wrote:
> > Lately I'm finding that the various cyrus processes go to "sleep" and never
> > wake up.  As a result sendmail is unable to deliver its mail to cyrus.  This
> > has happened 3 times in the last 48 hours.   When this happens users can connect to pop but not
> > IMAP, but again no new mail gets delivered from the MTA.
> This can happen if processes that are otherwise doing nothing get killed
> unexpectedly, either by an administrative action or by a low memory
> condition or similar.
> > If I restart Cyrus it now takes over an hour to fully start.  It spends this
> > time: converting db files, ctl_cyrusdb -r, and ctl_deliver -r.  While these
> > are running users cannot connect to imap or pop.  The cyrus processes use
> > 97% CPU on a pretty beefy machine for their entire duration.  When it completes they can
> > connect to both just fine and I can force sendmail to deliver all the mail
> > no problem.  However, this problem repeats just a few hours late.
> Please read:
> -Rob
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456
> Research Systems Programmer * /usr/contributed Gatekeeper

Ilan Rabinovitch 
ilan at E-MAIL

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