DNSBL helper not answering

Daniel Gehriger daniel.gehriger@linkcad.com
Thu Nov 23 15:41:36 UTC 2006


Vernon Schryver wrote:
> That is not exactly what I meant to say.  The race I suspect but have
> not verified might happen 50% of the time to the first 5 mail messages
> that arrive after at least 60 but fewer than 65 seconds of inactivity.
> If waitpid() is working as well as it does on FreeBSD and Solaris, the
> last helper will be reaped within 5 seconds.
> That possible race does not fit with the mention of failures continuing
> for hours.
> 
> A related problem with the description is that after 5 failures, all of
> the helpers are killed and a new batch started.

It's probably something else then. Below is part of the mail log, so you 
can see the timing. The filter command was:

grep DNSBL /var/log/mail |
	awk '/idle/ { i = 0; print "---"; } /idle/, /starting/ { if (i++ < 10) 
{ print i < 10 ? $0 : " ..." } } /starting/ { if (i > 10) { print $0} }'

Output:

> Nov 23 13:38:00 vps183 dccifd[13512]: DNSBL helper process on 127.0.0.1,52130 idle, exiting
> Nov 23 13:38:41 vps183 dccifd[9845]: 2GLa9v no DNSBL helper answer
> Nov 23 13:38:41 vps183 dccifd[9845]: 2GLa9v DNSBL failed for sender 219.130.217.157, 14.0 msg-secs remaining
> Nov 23 13:38:52 vps183 dccifd[9845]: 2GLa9v no DNSBL helper answer
> Nov 23 13:38:52 vps183 dccifd[9845]: 2GLa9v DNSBL failed for livedoor.com, 3.0 msg-secs remaining
> Nov 23 13:39:23 vps183 dccifd[11758]: 2GLa9y no DNSBL helper answer
> Nov 23 13:39:23 vps183 dccifd[11758]: 2GLa9y DNSBL failed for sender 218.35.41.141, 14.0 msg-secs remaining
> Nov 23 13:39:34 vps183 dccifd[11758]: 2GLa9y no DNSBL helper answer
> Nov 23 13:39:34 vps183 dccifd[11758]: 2GLa9y DNSBL failed for tradevan.com.tw, 3.0 msg-secs remaining
>  ...
> Nov 23 13:56:56 vps183 dccifd[24251]: DNSBL helper process starting on 127.0.0.1,55318
> ---
> Nov 23 14:03:35 vps183 dccifd[24251]: DNSBL helper process on 127.0.0.1,55318 idle, exiting
> Nov 23 14:07:04 vps183 dccifd[26120]: 2GLaa2 no DNSBL helper answer
> Nov 23 14:07:04 vps183 dccifd[26120]: 2GLaa2 DNSBL failed for sender 203.190.128.83, 14.0 msg-secs remaining
> Nov 23 14:07:15 vps183 dccifd[26120]: 2GLaa2 no DNSBL helper answer
> Nov 23 14:07:15 vps183 dccifd[26120]: 2GLaa2 DNSBL failed for hcl.in, 3.0 msg-secs remaining
> Nov 23 14:11:21 vps183 dccifd[7805]: 2GLaa6 no DNSBL helper answer
> Nov 23 14:11:21 vps183 dccifd[7805]: 2GLaa6 DNSBL failed for sender 201.1.175.162, 14.0 msg-secs remaining
> Nov 23 14:11:32 vps183 dccifd[7805]: 2GLaa6 no DNSBL helper answer
> Nov 23 14:11:32 vps183 dccifd[7805]: 2GLaa6 DNSBL failed for wytbear.com, 3.0 msg-secs remaining
>  ...
> Nov 23 14:16:10 vps183 dccifd[23725]: DNSBL helper process starting on 127.0.0.1,57177
> ---
> Nov 23 14:21:13 vps183 dccifd[23725]: DNSBL helper process on 127.0.0.1,57177 idle, exiting
> Nov 23 14:23:32 vps183 dccifd[19963]: 2GLaaq no DNSBL helper answer
> Nov 23 14:23:32 vps183 dccifd[19963]: 2GLaaq DNSBL failed for sender 59.95.99.117, 14.0 msg-secs remaining
> Nov 23 14:23:43 vps183 dccifd[19963]: 2GLaaq no DNSBL helper answer
> Nov 23 14:23:43 vps183 dccifd[19963]: 2GLaaq DNSBL failed for xxxx.nl, 3.0 msg-secs remaining
> Nov 23 14:23:54 vps183 dccifd[23589]: DNSBL helper process starting on 127.0.0.1,57177
> ---
> Nov 23 15:04:41 vps183 dccifd[23589]: DNSBL helper process on 127.0.0.1,57177 idle, exiting
> Nov 23 15:07:38 vps183 dccifd[30141]: 2GLadG no DNSBL helper answer
> Nov 23 15:07:38 vps183 dccifd[30141]: 2GLadG DNSBL failed for sender 86.82.40.95, 14.0 msg-secs remaining
> Nov 23 15:07:49 vps183 dccifd[30141]: 2GLadG no DNSBL helper answer
> Nov 23 15:07:49 vps183 dccifd[30141]: 2GLadG DNSBL failed for pagosaproperty.com, 3.0 msg-secs remaining
> Nov 23 15:09:21 vps183 dccifd[7288]: 2GLadI no DNSBL helper answer
> Nov 23 15:09:21 vps183 dccifd[7288]: 2GLadI DNSBL failed for sender 24.33.21.118, 14.0 msg-secs remaining
> Nov 23 15:09:32 vps183 dccifd[7288]: 2GLadI no DNSBL helper answer
> Nov 23 15:09:32 vps183 dccifd[7288]: 2GLadI DNSBL failed for loveescorts.net, 3.0 msg-secs remaining
>  ...
> Nov 23 15:25:32 vps183 dccifd[17462]: DNSBL helper process starting on 127.0.0.1,40506
> ---
> Nov 23 16:09:44 vps183 dccifd[17462]: DNSBL helper process on 127.0.0.1,40506 idle, exiting
> Nov 23 16:12:29 vps183 dccifd[31989]: 2GLagw no DNSBL helper answer
> Nov 23 16:12:29 vps183 dccifd[31989]: 2GLagw DNSBL failed for sender 213.76.135.10, 14.0 msg-secs remaining
> Nov 23 16:12:40 vps183 dccifd[31989]: 2GLagw no DNSBL helper answer
> Nov 23 16:12:40 vps183 dccifd[31989]: 2GLagw DNSBL failed for oxfordlife.com, 3.0 msg-secs remaining
> Nov 23 16:13:51 vps183 dccifd[5789]: DNSBL helper process starting on 127.0.0.1,40506

Regards,

Daniel



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