On 2013-11-18 17:57, Lawrence K. Chen, P.Eng. wrote:
On 2013-11-14 17:04, Mark Andrews wrote:
In message
<fd9b2cb2b33e394fae3b7466954760571d666...@dfwx10hmptc01.amer.dell.co
M>, vinny_abe...@dell.com writes:
Hi Everyone,
I recently had a recursive server running BIND 9.9.4 on FreeBSD 9.2
appear to wedge and stop responding to clients. I had a flurry of these
errors on the console:
sonewconn: pcb 0xfffffe007211d930: Listen queue overflow: 16 already in
queue awaiting acceptance
You can tune tcp-listen-queue in named.conf. The current default is 10.
Thanks!
-Vinny
My logs have been filling up with
sonewconn: pcb 0xfffffe02bb7187a8: Listen queue overflow: 10 already in
queue awaiting acceptance
Which seems to have started since upgrading to FreeBSD 9.2 (though there
have been other changes, but on the email front...so looking at BIND hadn't
crossed my mind at all until I spotted this thread), though its only on one
server, so I had been hunting around trying to figure out where its been
coming from.
So, digging around further....16 is QLEN, and the message is shown when QLEN
is > 3 * QLIM / 2. So, QLEN = 16 for QLIM = 10 is right.
So, I need to find something with QLIM = 6 in my case? Hmm, my proxy server.
Which seemed to be the only thing busy at the same time as when these
messages appear in my logs.
Meanwhile...I had this happen today...
sonewconn: pcb 0xfffffe00a7367930: Listen queue overflow: 5 already in queue
awaiting acceptance
Which does correspond with QLIM=3, where tcp-listen-queue's minimum and
default was 3...until 9.9 where it's minimum and default became 10.
--
Who: Lawrence K. Chen, P.Eng. - W0LKC - Sr. Unix Systems Administrator
For: Enterprise Server Technologies (EST) -- & SafeZone Ally
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