[Unbound-users] No answers from unbound occasionally
bra at fsn.hu
Fri May 29 15:08:43 UTC 2009
FreeBSD 7-STABLE, unbound r1584, single threaded.
It seems that occasionally it does not answer (or just doesn't receive,
I don't know) the queries.
With tcpdump it seems that the machine gets the query, but there is no
answer from unbound.
Its statistics counters seems OK, there is no full queue, or drops
according to that.
However netstat shows a high amount of "dropped due to no socket" cases:
netstat -s -p udp
17958542831 datagrams received
0 with incomplete header
0 with bad data length field
25928 with bad checksum
16209476 with no checksum
46927070 dropped due to no socket
33 broadcast/multicast datagrams undelivered
72146984 dropped due to full socket buffers
0 not for hashed pcb
18155004206 datagrams output
0 times multicast source filter matched
I've already tried to raise the related sysctls, without any effects.
Would it be possible to selectively enable verbose logging? I can
reproduce the no answer case in about an hour with a query tester
sending about 100 queries per second, but I can't enable the verbose
log, because it would kill the machine.
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