[ILUG] resolver udp socket leak?

[Garret.OKelly at beaumont.ie]

Hi, new subscriber to your list, a quick question for you if I may....





Does anyone know of a udp socket leak on redhat 7.0? Our scenario is as
follows:

I'm running Lotus Domino on a Redhat 7.0 system (kernel 2.2.16-22smp)
internally on our network. It forwards all non-local mail through a
mimesweeper machine. It isn't configured to use Dns, just a hosts file.

There is a udp socket leak that eventually causes higher level problems
with services. From what I've read on the newsgroups the cause may be that
Domino is establishing sockets to try to resolve hostnames. It is leaking
sockets bacause it is failing to resolve the names. Any ideas folks?


>ulimit -a
core file size (blocks) 1000000
data seg size (kbytes) unlimited
file size (blocks) unlimited
max locked memory (kbytes) unlimited
max memory size (kbytes) unlimited
open files 8192
pipe size (512 bytes) 8
stack size (kbytes) 8192
cpu time (seconds) unlimited
max user processes 2048
virtual memory (kbytes) unlimited


>cat /proc/net/sockstat
sockets: used 211
TCP: inuse 46 highest 56
UDP: inuse 150 highest 150
RAW: inuse 2 highest 3



>netstat -unp
udp 0 0 127.0.0.1:1034 127.0.0.1:53 ESTABLISHED 751/smtp
udp 0 0 127.0.0.1:1033 127.0.0.1:53 ESTABLISHED 751/smtp
udp 0 0 127.0.0.1:1032 127.0.0.1:53 ESTABLISHED 751/smtp
udp 0 0 127.0.0.1:1031 127.0.0.1:53 ESTABLISHED 751/smtp
udp 0 0 127.0.0.1:1030 127.0.0.1:53 ESTABLISHED 751/smtp


...etc



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