Network Deployment (Distributed operating systems), v8.0 > Reference > Administrator best practices


Web server plug-in troubleshooting tips

The following topics might help you diagnose problems with the web server plug-ins.

If you are having problems using a web server plug-in, try these steps:

If these files don't reveal the cause of the problem, follow these additional steps.


Plug-in Problem Determination Steps

The plug-in provides very readable tracing which can be beneficial in helping to figure out the problem. By setting the LogLevel attribute in the config/plugin-cfg.xml file to Trace, you can follow the request processing to see what is going wrong.

If you are using a Veritas File System with large file support enabled, file sizes up to two terabytes are allowed. In this case, if you set the LogLevel attribute in the plugin-cfg.xml file to LogLevel=Trace, then the //publib.boulder.ibm.com/infocenter/wasinfo/v8r0/index.jsp?topic=/ _plugin.log file might grow quickly and consume all available space on your file system. Therefore, you should set the value of the LogLevel attribute to ERROR or DEBUG to prevent high CPU utilization..

At a high level, complete these steps.

  1. The plug-in gets a request.
  2. The plug-in checks the routes defined in the plugin-cfg.xml file.
  3. It finds the server group.
  4. It finds the server.
  5. It picks the transport protocol, HTTP or HTTPS.
  6. It sends the request.
  7. It reads the response.
  8. It writes it back to the client.

We can see this very clearly by reading through the trace for a single request:

If none of these steps solves the problem:

For current information available from IBM Support on known problems and their resolution, see the following topics on the IBM support page:

For current information available from IBM Support on known problems and their resolution, see the IBM Support page. You should also refer to this page before opening a PMR because it contains documents that can save you time gathering information needed to resolve a problem.

You might find the following topics on the IBM support page helpful:


Implement a web server plug-in

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