On Mon, Jul 19, 2010 at 05:04:18PM +0100, David Mayo wrote: > > We are running a Cyrus Murder with one proxy/MUPDATE master and one > backend server which uses Cyrus Replication to replicate onto another > host. All hosts are running Cyrus imapd 2.3.13 on Solaris 10 Update 7. > > Since moving all our mailboxes to the backend server in March we have > seen 4 crashes on the backend server where it has refused to accept new > LMTP connections[1] and, although the logs show it is accepting IMAP > connections, no clients can get any response to the IMAP server. There > don't appear to be any suspicious logs leading upto the event on the > proxy server and nothing at all on the backend server. > > When trying to diagnose the issue, on any attempt to run ps, prstat or > to HUP the syslogd process (to set the log level for imapd to "debug") > the command hangs and cannot be exited with Ctrl+C. Similarly, attempts > to kill the master process or shut down the system (even bypassing the > shutdown scripts by using "reboot") do not have any effect other than > hanging the shell in which the commands were issued. New shells can be > opened and certain commands run, but we aren't much closer to knowing > precisely what is wrong. The only way to bring the system back is to > reset it via the on board console. > > My suspicion is somehow the behaviour in Cyrus is tickling a Solaris > bug, but I wanted to check with other Cyrus admins to see if they have > seen similar behaviour and had tracked it down to anything in particular. > > Regards, > > > Dave. > > David Mayo > Networks/Systems Administrator > University of Bath Computing Services, UK > > [1] > imapd.log: > Jul 8 11:04:51 tyrrell-z1.bath.ac.uk lmtpunix[984]: [ID 130975 > mail.error] connect(sauber.bath.ac.uk) failed: Connection timed out > > exim log: > 2010-07-08 11:04:51 1OWnyD-0000Fo-Ic == XXXXX@xxxxxxxxxx R=imap > T=cyrus_lmtp defer (-46): LMTP error after end of data: 451 4.4.3 Remote > server unavailable > Bad hardware can also cause symptoms of this type. Can you run diagnostics? I know that that is often hard to do on a production system. Cheers, Ken ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
