I'm also interested in this topic.  My "netstat -a" looked the same as
yours last week David.

Last week I ran into an issue where (what I think was..) some security
scans on my network for TCP traffic tied up a certain number of ports on
my W2k3 master and some NBU processes were unable to interact reliably.
Four levels of support were unable to suitably explain the problem to
me, and all we ended up doing was throwing in a TCP wait delay into the
registry,  which "worked" with middling success.  The issue has since
disappeared (mysteriously) - as I assume whatever activity that was
happening over those couple of days has since stopped.

Cheers,
Jon

 

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Clooney,
David
Sent: Monday, October 30, 2006 5:44 AM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] CLOSE_WAIT

Hi All

Scenario : 

Master server Solaris 8
Media server windows 2000

Over the past weekend we encountered a whole bunch of 219's on jobs
using a particular media server, a netstat on the media server provided
the below snapshot. The CLOSE_WAIT entries seemed to hang around for
ages, additionally hogging sockets. On the master server everything was
plodding along as usual.

Q1. can anyone explain why these sockets on the media server do not
close fully and hang around for quite sometime ? If indeed the master
server has not 
    finalised comms, what (on the master) would be keeping the socket
open between the two.

Q2. Does anyone know the default setting for the maximum number of
simultaneous tcp connections on windows 2000? 

Q3. If I was to add the registry key to tcp parameters
"TcpNumConnections" , what guidelines could I follow to determine the
number of connections ?

Q4. Not so long ago on the same windows media server I added the
registry key to tcp parameters "TcpTimedWaitDelay" in order to clear
TIME_WAIT more 
    quickly. Are there any known issues with windows 2000 and tcp
connections that I'm not aware off ?

Much appreciated

David Clooney


TCP    media_server:bpcd       media_server:795        ESTABLISHED
TCP    media_server:bpcd       media_server:834        ESTABLISHED
TCP    media_server:bpcd       media_server:868        CLOSE_WAIT
TCP    media_server:bpcd       media_server:991        CLOSE_WAIT
TCP    media_server:bpcd       master_server:551          CLOSE_WAIT
TCP    media_server:bpcd       master_server:562          CLOSE_WAIT
TCP    media_server:bpcd       master_server:591          CLOSE_WAIT
TCP    media_server:bpcd       master_server:610          CLOSE_WAIT
TCP    media_server:bpcd       master_server:645          CLOSE_WAIT
TCP    media_server:bpcd       master_server:696          CLOSE_WAIT
TCP    media_server:bpcd       master_server:768          CLOSE_WAIT
TCP    media_server:bpcd       master_server:807          CLOSE_WAIT
TCP    media_server:bpcd       master_server:829          CLOSE_WAIT
TCP    media_server:bpcd       master_server:830          CLOSE_WAIT
TCP    media_server:bpcd       master_server:867          CLOSE_WAIT
TCP    media_server:bpcd       master_server:904          CLOSE_WAIT
TCP    media_server:bpcd       master_server:919          ESTABLISHED
TCP    media_server:bpcd       master_server:976          ESTABLISHED
TCP    media_server:bpcd       master_server:982          CLOSE_WAIT
TCP    media_server:bpcd       master_server:1008         ESTABLISHED
TCP    media_server:bpcd       master_server:1023         ESTABLISHED



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