Kris Van Hees wrote:
> I had a problem where my mail server stopped being able to service connections
> because I had as many hanging spamdyke processes as was allowed in my
> tcpserver
> config (-c option). Unfortunately, the processes were cleaned up by another
> admin before I could look at them.
>
> And then, I just ran into the same situation again, where a spamdyke process
> is hanging, and has been hanging for 2.5 hours so far. Here is output from
> log-level debug in spamdyke (XXXXX substituted for domain name):
>
> Oct 5 20:27:16 saffron spamdyke[3978]:
> DEBUG(filter_rdns_missing()@filter.c:841): checking for missing rDNS; rdns:
> (unknown)
> Oct 5 20:27:16 saffron spamdyke[3978]: FILTER_RDNS_MISSING ip: 77.30.98.26
> Oct 5 20:27:16 saffron spamdyke[3978]:
> DEBUG(filter_ip_whitelist()@filter.c:1120): searching IP whitelist file(s);
> ip: 77.30.98.26
> Oct 5 20:27:17 saffron spamdyke[3978]:
> DEBUG(filter_recipient_relay()@filter.c:2176): checking relaying;
> relay-level: 3 recipient: [EMAIL PROTECTED] ip: 77.30.98.26 rdns: (unknown)
> local_recipient: true relaying_allowed: false
> Oct 5 20:27:17 saffron spamdyke[3978]: DENIED_RDNS_MISSING from: [EMAIL
> PROTECTED] to: [EMAIL PROTECTED] origin_ip: 77.30.98.26 origin_rdns:
> (unknown) auth: (unknown)
>
> I would have expected the connection to be dropped at this point, and spamdyke
> to exit. Looking at lsof -i output for this process, I get:
>
> spamdyke 3978 qmaild 0u IPv4 732880026 TCP
> saffron.alchar.org:smtp->77.30.98.26:56004 (ESTABLISHED)
> spamdyke 3978 qmaild 1u IPv4 732880026 TCP
> saffron.alchar.org:smtp->77.30.98.26:56004 (ESTABLISHED)
> spamdyke 3978 qmaild 3u IPv4 732880028 UDP *:41956
>
> So, the connection is still alive. Netstat -an confirms this:
>
> tcp 0 0 192.168.0.1:25 77.30.98.26:56004
> ESTABLISHED
>
> Looking at strace output, spamdyke is stuck in a select loop, waiting for
> something:
>
> Process 3978 attached - interrupt to quit
> select(1, [0], NULL, NULL, {1, 580000}) = 0 (Timeout)
> time(NULL) = 1223261329
> select(1, [0], NULL, NULL, {2, 0}) = 0 (Timeout)
> time(NULL) = 1223261331
> select(1, [0], NULL, NULL, {2, 0}) = 0 (Timeout)
> time(NULL) = 1223261333
> select(1, [0], NULL, NULL, {2, 0} <unfinished ...>
> Process 3978 detached
>
> Looking at the process using gdb didn't show anything interesting, because the
> backtrace is trash (possibly in part due to me stripping the spamdyke
> executable). It simply lists the top frame as:
>
> #0 0xb7ec39f8 in select () from /lib/tls/libc.so.6
>
> and the rest if garbage. Smells like possible memory corruption.
>
> Anyone seen something like this? This is with spamdyke 4.0.4.
>
> Kris
>
Do you have something like
idle-timeout-secs=660
parameter in your configuration? The default is 0, which will not time out.
--
-Eric 'shubes'
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