Martin Furter wrote:
>
> Hello
>
> A few month ago I installed dbmail-2.0.7 on OpenBSD 3.7 with
> porstgresql-7.4.3p2.
>
> It was running fine until yesterday the box was extremely slow. After
> some investigation I saw lots of dbmail-imapd zombies and about 20 imapd
> processes using up 100% CPU.
>
> Killing them didn't work so I killed all with -9 and restarted imapd.
Bummer. Havent seen those for a while. My advice is to run some sort of
keepalive service, which checks imapd and restarts if necessary.
> Today the box was in the same state. So i upgraded to 2.0.9 and
> restarted imapd.
I don't think any changes between 2.0.7 and 2.0.9 will have solved this.
>
> But I saw a few error messages on the console:
> dbmail-imap4d[12554]: serverchild.c,CreateChild: child_register failed
Obviously some sort of resource depletion going on here. What's killing
the imapd processes is one question, why it isn't handled by the pool.c
code is another.
Maybe this child_register failed error should be fatal, causing all
imapd processes to shutdown, and restart.
> Looking at the code in CreateChild I'd say the handling of fork failures
> is wrong, maybe the following patch solves the problem:
It wont. This condition is already handled by
pool.c,manage_start_children line 357.
>
> Index: serverchild.c
> ===================================================================
> --- serverchild.c (revision 2053)
> +++ serverchild.c (working copy)
> @@ -175,6 +175,11 @@
> {
> id_t pid = fork();
>
> + if (pid == -1) {
> + trace(TRACE_FATAL, "%s,%s: fork failed",
> + __FILE__, __func__);
> + return pid;
> + }
> if (! pid) {
> if (child_register() == -1) {
> trace(TRACE_FATAL, "%s,%s: child_register failed",
>
> The versin I run now does not contain that patch because I want to see
> if it happens again with 2.0.9.
>
> Sorry for the noise if it's already fixed.
>
> Thanks
> Martin
> _______________________________________________
> Dbmail-dev mailing list
> [email protected]
> http://twister.fastxs.net/mailman/listinfo/dbmail-dev
>
--
________________________________________________________________
Paul Stevens paul at nfg.nl
NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31
The Netherlands________________________________http://www.nfg.nl
