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PME Web Application gives an "HTTP 503 Service Unavailable" error message when Reports is selected

Published date: 30 September 2019

The customer is receiving an "HTTP 503. The service is unavailable" error message when selecting the 'Reports' tab through Web Applications.

Product Line
Power Monitoring Expert 7.2.x / 8.x / 9.x

Web Reports

If Microsoft Monitoring Agent with .Net Application monitoring is installed, the 'WebReporterAppPool' Application Pool within Internet Information services is not started and crashes if started manually.

Resolution 1
This resolution does not require removing Microsoft Monitoring Agent. Instead, it is uninstalled, then reinstalled via the command line using a switch that prevents the .Net Application monitorng from being installed.

To do this:

1. Uninstall Microsoft Monitoirng Agent from Control Panel -> Programs and Features
2. Start a command prompt in the directory that includes the Microsoft Monitoring Agent installer (it's called MOMAgent.msi)
3. Run MOMAgent.msi NOAPM=1

Resolution 2
Windows updates will install a tool named the "Microsoft Monitoring Agent".  This tool applies a policy to the application pool that causes it to crash.  Uninstalling the tool through Add/Remove programs will allow Web Reports to function as expected.

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