[courier-users] Courier MTA Problem

[Steve Lange]

Hello everyone! I have CentOS 4.0 (RedHat Enterprise Linux 4.0 clone)
installed with Courier MTA 0.49.0 with database authentication for
virtual users (I have tried MySQL 4.1 and switched to PostGreSQL 7.4.7
to eliminate that as a possible problem) and have a combination of
Mozilla ThunderBird 1.0 and SquirrelMail on the client side. I have
already found documentation telling me to increase the MAXPERIP setting
in Courier to more than 4 (so ThunderBird won't get disconnected) and
that has worked great.

However, after about 8 hours of uptime, Courier stops accepting requests
and becomes incredibly slow. Has anyone seen this before? Once I
reboot the box...I'm good for another 8 hours or so until it happens
again. I have already tested this on 2 different servers with the same
software and have the same problem on both boxes, so I know it's not a
hardware problem. The server is handling 120 email users. Every time
the server dies, I still have plenty of RAM left and have never used any
SWAP. Also, even when Courier stops responding, the rest of the
services on the server run great (apache2 and database access).

I turned on auth debugging and found this error message:

courierd: SHUTDOWN: respawnlo limit reached, system inactive
courierd: Loading STATIC transport module libraries

Any info would be greatly appreciated!!
Thanks in advance!
sla...@mdayinc.com

--

Thank You,
Steve

Steve Lange
Network Planning Analyst
Michael Day Enterprises
Phone: 330-336-7611
960 Seville Rd.
Wadsworth, Ohio 44281
www.mdayinc.com

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[David Gomillion]

courier-u...@lists.sourceforge.net wrote:
> Hello everyone! I have CentOS 4.0 (RedHat Enterprise Linux
> 4.0 clone)

[snip]

> However, after about 8 hours of uptime, Courier stops
> accepting requests
> and becomes incredibly slow. Has anyone seen this before? Once I
> reboot the box...I'm good for another 8 hours or so until it happens
> again. I have already tested this on 2 different servers

This sounds somewhat similar to some issues I experienced with Fedora
Core 3. Does CentOS 4.0 use FAM or gaim? You may want to search the
list archives for gaim and see a history on what might be causing this.

Hope this helps,
David

[David Gomillion]

Steve Lange wrote:
> David,
>
> Thank you for the response! I know that Fedora Core 3 and CentOS 4
> are very similar. I'm not sure what FAM and Gaim are?
>
> What was your problem with Fedora Core 3?
>
> Thanks again,
> Steve
>

I couldn't find a good archive of my previous thread, but here's the
gist: FC3 replaced FAM (file alteration monitor) with gamin (sorry about
the typo in the previous email), which, according to
www.gnone.org/~veillard/gamin is a "subset of the FAM system." It would
seem that part of the superset in FAM that Courier needs is not in
Gamin.

I spent a few minutes searching CentOS's site for a package list, but
couldn't find it.

I then went and looked at a mirror, and found gamin and gamin-devel
listed, but fam was nowhere to be found. So, I would say that CentOS 4
is using gamin.

Does anybody else have good information on why gamin and Courier don't
seem to work well together?

[Sam Varshavchik]

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Steve Lange writes:

> However, after about 8 hours of uptime, Courier stops accepting requests
> and becomes incredibly slow. Has anyone seen this before? Once I

Define "stops accepting requests", specifically: IMAP, POP3, or SMTP
requests.

> I turned on auth debugging and found this error message:
>
> courierd: SHUTDOWN: respawnlo limit reached, system inactive
> courierd: Loading STATIC transport module libraries

This is a normal message, and does not indicate that anything's wrong.

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