qmail-remote uses 100% CPU when delivering to certain hosts

[Mark Saad]

On Sep 28, 2012, at 10:12 PM, Boris Kochergin <spawk at acm.poly.edu> wrote:

> Hi.
> 
> Firstly, my environment:
> 
> FreeBSD isis.poly.edu 9.1-RC1 FreeBSD 9.1-RC1 #0: Thu Sep 20 23:42:23 EDT 2012     boris at jails.isis.poly.edu:/usr/obj/usr/src/sys/GENERIC  amd64
> 
> qmail-tls-1.03.20021228_4
> 
> I have noticed that qmail-remote spins around using 100% CPU forever when delivering mail to a select few hosts. I believe this all to be in userspace as top reports that the CPU is busy with only userspace code. This has never happened when the machine was running 8.0-RELEASE, but happens with 8.2-RELEASE and 9.1-RC1.
> 
> The environment this happens in is a jail.
> 
> Calling truss on the offending processes produces no output, with truss in the "wait" state forever. I've tcpdumped the conversation between the qmail-remote process and the remote host. It is attached with this e-mail.
> 
> Thoughts?
> 
> -Boris
> <qmail-remote.pcap>



Boris the messages that are in the delivery queue ,at this time, can you share any details on them are they big, small etc . Also what file system do you use for the hauls .