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NDC Dashboard Failure

Scenario​

NDC Dashboard fails to load and the conceptsearching eventlog shows this error:

Component: conceptClassifier
 Caller: Run
 Level: Error
 conceptEngine2.ServiceModel.PingQs
 Failed to contact QS: http://localhost:80/conceptQS/conceptQS.asmx, error: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. --->

In addition to this error, in the conceptsearching log, you will see the below error in the Windows Application Event Log:

Faulting application name: w3wp.exe, version: 10.0.17763.1, time stamp: 0xcfdb13d8
 Faulting module name: PerfMon64.dll, version: 8.0.13053.0, time stamp: 0x5a26da79
 Exception code: 0xc0000409
 Fault offset: 0x000000000013f68f
 Faulting process id: 0x2940
 Faulting application start time: 0x01d53c07a74a0b75
 Faulting application path: c:windowssystem32inetsrvw3wp.exe
 Faulting module path: C:Program FilesMicrosoft Monitoring AgentAgentAPMDOTNETAgentV8.0.13053.0PerfMon64.dll
 Report Id: 84973451-9fbf-4b31-9dd8-ca486181ffd2
 Faulting package full name:
 Faulting package-relative application ID:

The faulting module path listed in the error points out that the cause of the IIS fault is the 2016 SCOM agent.

Solution​

  1. Uninstall the 2016 SCOM agent from the IIS server.
  2. Stop the following services:
    • conceptclassifier
    • conceptcollector
    • conceptindexer
  3. Restart the server.

The dashboard will load and the issue is resolved.

If uninstalling the SCOM 2016 agent is not an option, follow either Method 1 or Method 2 in the article linked below, depending on your SCOM needs: