On Tue, 23 Feb 2010, 11:36 +0200, Kostik Belousov wrote: > On Tue, Feb 23, 2010 at 12:35:22PM +1100, John Marshall wrote: > > Environment: sendmail 8.14.4 on FreeBSD 8.0-RELEASE-p2 > > > > Since upgrading a few local servers to FreeBSD 8.0-RELEASE (and > > subsequently 8.0-RELEASE-p2), I have been seeing VERY intermittent > > problems with sendmail persistent queue runners. One or more queue > > runners will fail to wake up (having been told to sleep for either 1 or > > 5 seconds) and mail accumulates in their queue group queues. > > > > I have only seen this about 4 times but at least once on each of the > > three 8.0 servers. I've been seeing something like one occurrence per > > fortnight overall. The first few times I re-started sendmail. On > > Saturday I spent longer looking at it. > > I think the best way to collect the data would be ktrace the queue runners, > preferrably starting the ktrace before they are stuck.
OK. I've caught one of them (different server from Saturday). PID TT STAT TIME COMMAND 48501 ?? Ss 0:14.77 sendmail: accepting connections (sendmail) 48502 ?? S 1:00.24 sendmail: running queue: /var/spool/mqueue/qd1/df (sendmail) 48503 ?? S 0:38.11 sendmail: running queue: /var/spool/mqueue/mby/df (sendmail) 48504 ?? I 0:27.34 sendmail: running queue: /var/spool/mqueue/oz/df (sendmail) 48505 ?? S 0:37.59 sendmail: running queue: /var/spool/mqueue/rw2/df (sendmail) 48506 ?? S 0:34.93 sendmail: running queue: /var/spool/mqueue/hold/df (sendmail) My ktrace file was created with 'ktrace -g 48501'. I have the result of 'kdump -R -p 48504' available at: <http://www.riverwillow.net.au/~john/8_0/rwsrv04_201002240725.kdump.gz> The affected queue group was empty. I have redirected messages for that domain to a different queue group so that I can leave that queue runner stuck. -- John Marshall
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