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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 error messages in the License Statistics log file:, licstat.log.

Starting secondary apache process timed out. [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...

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Already running apache web server sends failed respond. Failed to start apache web server.


To 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.)
   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"
   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 section, below
    

2. Review the information stored in License Statistics log file, licstat.log. 

You may also see an error similar to the following:

External apache stopped running.

To investigate the cause of this error, you should verify the Apache instance.

Note: When using Linux, make sure all 32-bit compatible libraries are installed, as mentioned in Operating system and resource requirements. An installation wizard will keep you informed which libraries are missing. If not all 32-bit libraries are installed, you may see one or more of the errors listed at the top of the pageabove.

"Unable to start apache webserver" error

After upgrading to version 5.12 or newer, if License Statistics is unable to start, you may see the following error message in licstat.log file:

Unable to start apache webserver: exit status 3221225781

This error most commonly appears for Windows Server 2008 or 2012 if there is a missing library (api-ms-win-crt-runtime-l1-1-0.dll) that is required to launch Apache web server. This library is provided in a Windows update. To resolve this issue, stop License Statistics, install all updates recommended by Windows Update, and restart License Statistics.

"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!in the License Statistics log file, licstat.log.

Apache is not responding to HTTP requests! Please make sure no other application is blocking port .. or your DNS service works properly!
Please verify that configured port is not in use by other application.
Please make sure that current user has permissions to use configured port.

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

Note:Essentially, License Statistics does not support an Apache web server that has a version older other than the delivered one. Therefore, when you decide to use an Apache web server that has a version older other than the delivered one, you should find a solution to a related problem on your own.

However, when you decide 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 that 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.

"RSA server certificate CommonName (CN) does NOT match server name" error

You may receive the following error in apache_error.log after enabling SSL for Apache:

RSA server certificate CommonName (CN) does NOT match server name

When this problem occurs, License Statistics becomes inoperative, i.e. shuts down after the startup.

To resolve this issue, you need to specify the certificate details by setting SSL_CERTIFICATE_FILE and SSL_CERTIFICATE_KEY_FILE in the License Statistics configuration file (xflicstat.cfg) for a server that can be reached from a browser. Other certificates will not be accepted.

For more information about setting SSL properties for Apache, see Enabling Apache SSL.

"PHP jobs scheduler encountered a problem" error

If there are problems with LICENSE_STATISTICS_INSTALLATION_FOLDER/log/ui folder permissions, you may see an error similar to the following in the License Statistics log file, licstat.log.

[2014/10/30 08:00:00] ERROR: PHP jobs scheduler encountered a problem: 500 Internal Server Error

To confirm that the problem is related to permissions—which may prevent some log files from being written in the LICENSE_STATISTICS_INSTALLATION_FOLDER/log/ui folder—check whether the ui folder contains any files and if they are up-to-date. Note that the ui folder may contain either no files or outdated files, depending on whether the problem occurred shortly after installing License Statistics or at a later point in time.

To resolve this issue, increase the ui folder permission settings.