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Apache errors

If there are problems with an Apache web server, you may see one or more of the following errors in the License Statistics log file:

[2012-04-01 08:0:00] FAIL: Unable to start apache web server! 

[2012-04-01 08:00:00] FAIL: Apache manager error: Unable to connect to licstat:8080 web server! 

[2012-04-01 08:00:00] FAIL: Apache is not responding to HTTP requests! 

[2012-04-01 08:00:00] NOTICE: Waiting for httpd process to start, which takes more time than usual...

You can investigate the cause of these errors using the following steps.

  1. Start License Statistics in debug mode. (See Enabling License Statistics debug logs for instructions on enabling debug mode.)

  2. Locate the command used to start the Apache web server in the xflicstat.log file; for example: 

    [2012-04-01 08:00:00] XF_DEBUG: Starting Apache web server process: X:\licstat\apache\bin\httpd.exe -f "X:\licstat\apache\conf\httpd.conf" -d "X:\licstat\apache"

  3. Using this command, manually start the Apache web server and note any errors that occur. If errors indicate that the same http port is already being used by another application, refer to "Unable to open http server on port" error, below.

"Unable to open http server on port" error

The License Statistics Usage Monitor is configured by default to use port 80 for the http server, which is used to display License Statistics web-based UI pages in the browser. If this port (or another port you specified in the configuration file) is already being used by another application, you will see an error similar to the following:

[2009-05-04 14:35:40] WARNING: Cannot bind on TCP 0.0.0.0:80! Make sure no other applications use this port!
[2009-05-04 14:35:40] FAIL: Unable to open http server on port 80!
[2009-05-04 14:35:40] Shutting down due to exit signal
[2009-05-04 14:35:40] Starting monitor of 27000@localhost with query interval of 60 seconds!
[2009-05-04 14:35:40] Stopping monitor of 27000@localhost!

To resolve this issue:

  1. Free up the port by ending the applications that are using it or specify a different port.
  2. Restart License Statistics.
  3. Recheck the log file to ensure the error is resolved.

Apache version

When trying to run License Statistics with an Apache web server that has a version other than the delivered one, make sure that your Apache server is compatible with the License Statistics Apache configuration. You can configure the server settings in the apache/config directory inside the License Statistics installation directory.

Note: License Statistics is delivered with Apache/PHP version that is sufficient to meet current product requirements. Therefore, it is recommended not to upgrade an Apache/PHP server, unless you are certain that such change is necessary.

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