IIS 5 & IIS 6
app pools down - The process exit code was '0x0'
Last post May 15, 2008 01:25 PM by fabioy
May 12, 2008 03:19 PM|bbub|LINK
Recently my server has app pools down randomly with error as follows:
A process serving application pool 'apppool_name' terminated unexpectedly. The process id was '12576'. The process exit code was '0x0'.
For more information, see Help and Support Center at
The event ID is 1009. This kind of event is happening every hour in random application pools (even in for web sites running pure HTML) . But not all event cause app pool down, only some of them will.
I have already followed
http://blogs.iis.net/brian-murphy-booth/archive/2007/03/22/how-to-troubleshoot-an-iis-event-id-1009-error.aspx for information and this doesn't fix the error. DebugDiag doesn't give me really good stuff...it gives me a lot of errors not shown in Event Viewer,
and seems 0x0 errors are not captured... really strange.
Any ideas? Please help, Thanks.
May 15, 2008 01:25 PM|fabioy|LINK
It looks like the worker process is crashing for some unknown reason. The easiest way to find out the issue is to run the worker process under a debugger and capture the failure as it happens. CJ Pattekar has a good blog entry on how to set it up
here. Use the commands to fix the symbols and get the call stack:
Hope this helps.