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] Starting secondary apache process timed out. Unable to start apache web server.
[2012-04-01 08:00:00] Already running apache web server sends failed respond. Failed to start apache web server.
[2012-04-01 08:00:00] External apache stopped running.
To investigate the cause of these errors: by reviewing the information stored in the License Statistics log file.
- Start License Statistics in debug mode. (See Enabling License Statistics debug logs for instructions on enabling debug mode.)
Review the information stored in License Statistics log file.
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 page.
"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 in the License Statistics log file.[2009-05-04 14:35:40] Apache is not responding to HTTP requests! Please make sure no other application is blocking port .. or your DNS service works properly!
[2009-05-04 14:35:40] Please verify that configured port is not in use by other application.
[2009-05-04 14:35:40] Please make sure that current user has permissions to use configured port.
To resolve this issue:
- Free up the port by ending the applications that are using it or specify a different port.
- Restart License Statistics.
- 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 than the delivered one. Therefore, when you decide to use an Apache web server that has a version older 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.