Re: CLOSE_WAIT processes and instances HANG
Re: CLOSE_WAIT processes and instances HANG
- Subject: Re: CLOSE_WAIT processes and instances HANG
- From: Chuck Hill <email@hidden>
- Date: Tue, 29 Jul 2008 09:38:45 -0700
On Jul 29, 2008, at 5:14 AM, Bob Stuart wrote:
Hi All,
I Know I need to update some of this but it had been running fine
for quite a while.
WebObjects 5.3.3
OS X 10.4.11
Java 1.5.0_13-b05-241
WONDER 3 from a March-03-2007 Daily build
Frontbase 4.2.7
"All of a sudden" The application is hanging often. No good idea
why. Running ~10 instances of the the same code base with different
launch params to connect to different client DB's
Many of the instances for will hang. The DB seems fine and we don't
see all the instances for any DB fail at once. If no one hits the
app they seem to stay fine such as over the weekend. Otherwise they
seem to die at least once a day. The more heavily used die more
often but the very lightly used die also.
I did a netstat and found many CLOSE_WAIT when the instances were
hung but don't know if that is relevant.
My initial guess is that this is just a symptom of the problem.
We did deploy new features recently but no "major" type changes.
Ideas? Suggestions?
The symptoms sound like deadlock to me. It does not take a major
change to cause this. You will need a thread dump to diagnose
further. You can find instructions here: http://www.gvcsitemaker.com/gvc.webobjects/faq&mode=single&recordID=41413
Chuck
--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
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