This paper discusses techniques for diagnosing problems that are related to the Web server plug-in for WebSphere Application Server V6, including those resulting from configuration errors. The Web server plug-ins handle communications between a Web server and the Web container in an application server or servers. Symptoms of a problem that involve the plug-in include: Users cannot access an application through the Web server, load balancing and failover are not working properly, session data is being lost, slow or intermittent application response, the Web server will not start after plug-in installation or configuration. The Web server plug-in works with six different Web servers. However, this paper concentrates on the IBM® HTTP Server and its plug-in. It does not address Web server problems or problems that are related to the application server Web container.
This Redbooks paper explains techniques for diagnosing problems related to the Web server plug‑in used with IBM WebSphere Application Server V6. It describes common symptoms, the plug‑in configuration file, and how the plug‑in interacts with web servers and application server clusters.
The document also provides step‑by‑step guidance on collecting logs, enabling trace logging, and using session affinity. It includes examples of plug‑in directives, load‑balancing configurations, and troubleshooting procedures for administrators.
| Product version | V6 |
|---|---|
| Supported web servers | Six |
| Default plug‑in log level | Error |
Typical symptoms include users cannot access an application, load balancing and failover not working, session data loss, slow or intermittent response, and the web server failing to start after plug‑in installation.
Set the LogLevel attribute to "Trace" in the plugin‑cfg.xml file (e.g.,