Urgent: Location of WebSphere logs

[dougp]

I know, I know.  My problem isn't your problem.  But if you have a minute...

My Cognos production system is down (from the users' perspective).  Technically, Cognos works (via the dispatcher URL).  I'm using IIS as the gateway for SSO.  IIS also works.  But Cognos and IIS are not speaking.  Some falling out about politics or something...

IBM Support seems too busy to help with my production system being unavailable for users.  When they do respond, I want all of the information they may need.  The one thing I can't find is the log file containing the error message that my Cognos URL is delivering (HTTP Error 503. The service is unavailable.)  It's not coming from IIS.  cognosserver.log and cogaudit.log look like the system is working fine.  Schedules are running.  Users just can't get to Cognos.

Where is the web server log for the web server (behind IIS) that actually runs Cognos?

[dougp]

A little more information:
IBM Cognos Analytics 11.1.7IF6
Windows Server 2012 R2
IIS gateway for SSO

This turned out to be surprisingly simple, but confusing to troubleshoot.

The application pool was stopped.

Right-click, start -- problem immediately resolved.

The problem survived two reboots.  I think I'm the victim of a Windows update.

Still wouldn't mind knowing the location of that web server log.