TEC606016: No performance data is visible for Webservers when using the Webserver PowerPack to monitor Apache Web Server. [ERROR] [WebServerMonitor] Could not get performance metrics from server

Document created by mike_cook Employee on May 25, 2016Last modified by SamCreek on May 25, 2016
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Author: mike_cook

     Document ID:  TEC606016

     Last Modified Date:  2/12/2014

 

  • Products
    • CA Application Performance Management
  • Releases
    • CA Application Performance Management:Release:9.1 SP2
    • CA Application Performance Management:Release:9.1.0
    • CA Application Performance Management:Release:9.1.1
    • CA Application Performance Management:Release:CA APM 9.5
  • Components
    • APM POWER PACKS

 

Description:The Webserver is visible in the Investigator but only availability and info branches are visible under the Webserver - there is no performance branchSolution:There are a couple of possible causes for this issue, and corrective action will depend on the type of error that is reported.First, check the agent log file to verify that it is attempting to obtain performance data. The log will contain an error similar to the following:

Next, check the webserver logs to see if any error is reported in the request to access the page identified above.Scenario 1:If the following type of error is seen:

  • [error] [client 1.1.1.2] File does not exist: /opt/mywebserver/data/server-status

it can indicate that the page has not been enabled in the httpd.conf file.To resolve this, ensure that the following entry exists and is not commented out:

  • LoadModule status_module modules/mod_status.so

Scenario 2:If, instead, the following type of error is reported:

  • [error] [client 1.1.1.2] client denied by server configuration: /data/mywebserver/data/server-status

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This example of DEBUG logging reveals an underlying HTTP 403 error (permission denied) which matches the second scenario. An underlying HTTP 404 error (not found) would point to the first scenario.

 

 

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