Problem with IMAP server suddenly hanging

David Carter dpc22 at
Wed Jun 25 02:31:21 EDT 2003

On Tue, 24 Jun 2003, Rob Tanner wrote:

> I just installed cyrus-imapd-2.1.13 on a Solaris machine.  The
> conversion from the old MessagingDirect server was even easier than
> expected.  The server started up just fine and then hung.  I kill the
> master and restart and everything is okasy for a while and then it
> hangs (imap requests connect but nothing happens).  Also, I've noticed
> that "ctl_cyrusdb -c" is also hung at the time (truss shows the process
> in a constant sleep state from which it doesn't awake until master is
> killed).  I think ctl_cyrusdb's sleep state is a symptom, not the cause
> since it also runs at other times just fine.
> Any ideas on what I need to look at/for?

Is there anything interesting in the logs?

There seems to be a bad interaction between Cyrus and DB 4.1.25 which
might explain what you are seeing. Its been fixed in CVS.

The other common explanation for hangs is /dev/random running out of
entropy, but I don't think that would affect ctl_cyrusdb.

David Carter                             Email: David.Carter at
University Computing Service,            Phone: (01223) 334502
New Museums Site, Pembroke Street,       Fax:   (01223) 334679
Cambridge UK. CB2 3QH.

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