Create or update a global web server plug-in configuration file

If all of the application servers in a cell use the same web server to route requests for dynamic content, such as servlets, from web applications to application servers, we can create a global web server plug-in configuration file for that cell. The resulting plugin-cfg.xml file is located in the profile_root/config/cells directory.

Avoid trouble: We can update the global plugin-cfg.xml file using the console or running the GenPluginCfg command for all of the clusters in a cell. However, you must delete the config/cells/plugin-cfg.xml file before you update the global plugin-cfg.xml file. If we do not delete the config/cells/plugin-cfg.xml file, only the new properties and their values are added to the global plugin-cfg.xml file. Any updates to existing plug-in property values are not added to the global plugin-cfg.xml file.gotcha

We must update the global web server plug-in configuration file whenever you perform one of the following actions:

To update the configuration settings for a global web server plug-in, we can either use the Update global web server plug-in configuration page in the console, or issue the following command:

Both methods for regenerating the global web server plug-in configuration create a plugin-cfg.xml file in ASCII format.

To use the Update global web server plug-in configuration page in the console:

  1. Click Environment > Update global web server plug-in configuration.

  2. Click OK to update the plugin-cfg.xml file.

  3. Optional: Click View or download the current web server plug-in configuration file to view or download the current version of this file.

    We can select this option to:

    • View the current version of the file before you update it.

    • View the file after it is updated.

    • Download a copy of this file to a remote machine.


Results

Regenerating the configuration might take a while to complete. After it finishes, all objects in the administrative cell use their newest settings, which the web server can access. Whether triggered manually or occurring automatically, plug-in regeneration requires about 30 to 60 seconds to complete when the application server is on the same physical machine (node) as the web server. In other cases, it takes more time.

The delay is important because it determines how soon the new plug-in configuration takes effect. Suppose you add a new served path for a servlet, then regenerate the plug-in configurations. The regeneration requires 40 seconds, after which a user should be able to access the servlet by the new served path.

For an HTTP plug-in, the length of the delay is determined by the Refresh Interval attribute of the Config element in the plugin-cfg.xml file. The plug-in polls the disk, or file system, at this interval to see whether the configuration has changed. The default interval is 60 seconds. To regenerate the plug-in configuration requires twice the refresh interval.

In a development environment in which we are frequently changing settings in the console, IBM recommends set the refresh interval to 3 to 5 seconds.

In a production environment, set a longer refresh interval, perhaps as long as 30 minutes, depending on the frequency of changes.


What to do next

You might need to stop the application servers in the cell and then start the application servers again before the changes to the plug-in configuration go into effect.

If the web server is running on a remote machine, click View or download the current web server plug-in configuration file to download a copy of the plugin-cfg.xml file to a that machine.

When the deployment manager is installed on a machine that is remote from where the product is installed, one of the following solutions must be implemented in order for the plugin-cfg.xml file to retain the application server directory structures, and not assume those of the deployment manager after the plug-in is regenerated and a full synchronization occurs.


Subtopics


Related tasks

  • Change the application server configuration
  • Stopping an application server
  • Start an application server

    (dist)(zos) GenPluginCfg command