Changing the JDK for a grid host

Use this procedure to change the JDK version used on a particular grid host.

Note: Any overrides at host, application, or node level to the JDK set in the grid properties will still be in place following this step, and will not be updated.

Changing the JDK stops all running applications immediately and then stops all grid nodes including the Host Router. This procedure should only be done in controlled circumstances since it will impact users of the application.

  1. Stop the Grid. See Stopping the Grid.
  2. For each host where you want to change the JDK:
    1. Open an administrator command prompt and navigate to grid_root_installation_path\bin.
    2. Run the ChangeJDK script passing the new JDK as parameter. For example:

      ChangeJDK c:\java\java18 (Windows) or ChangeJDK opt/java18 (*ix).

    3. Restart the grid bootstrap service.
  3. Start the Grid. See Starting the Grid.