Re: WAS suddenly dying

Hey Steven,

After you've confirmed that the WCF requests got blocked at the .NET managed runtime(if you see the requests arrive the server-side and exits in IIS LOG), you can use the means mentioned in previous article I provided to capture a hang dump for analysis.

We will do this. But one more thing: we have recognized that one IIS-Parameter
is the cause of this madness.

We are running here an X64 with 4 Kernels. The Param "maxProcesses" of the AppPool
was set to 4 by default (Installation of the IIS or when the AppPool was created).
After changing this to 1 it seems to work.

We had also a different issue with the EnterpriseLib logging (or maybe this is related).
We log all infos into one file. Sometimes the EL creates file duplicates with random suffixes.
Then the logging stops completely (the services are still running) and approx. 1 day later they
die.

This behaviour is gone since we did set the parameter to 1 (which will have a negative impact on
the performance).

Thanks,
Frank



Steven Cheng schrieb:
Ok. Then that will be fine if there is no other application involved in the same application pool.

After you've confirmed that the WCF requests got blocked at the .NET managed runtime(if you see the requests arrive the server-side and exits in IIS LOG), you can use the means mentioned in previous article I provided to capture a hang dump for analysis.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


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--------------------
Date: Tue, 21 Apr 2009 11:28:57 +0200
From: Frank Hauptlorenz <ecstasy.tribe@xxxxxxxxxxxxx>
User-Agent: Thunderbird 2.0.0.21 (Windows/20090302)
MIME-Version: 1.0
Subject: Re: WAS suddenly dying


Hi Steven,

As you mentioned that 16 applications shared the application pool on your server, then would it be possible for you to isolate your webservice app
to
a single dedicated application pool. Then, you can test the webservice

No, I meant we host 16 WCF-Services within one dedicated application pool.
All services are belonging to our application.

Frank



Steven Cheng schrieb:
Thanks for your reply Frank,

As for hang troubleshooting and debugging, there are some existing
tutorial
and reference on this:

#Troubleshooting an IIS Crash/Hang
http://cavemansblog.wordpress.com/2008/04/16/troubleshooting-an-iis-crash/


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