On all systems, you can change a user-defined extension file.
These two scenarios must be used with caution, because any integration server that is connected to the same integration node also detects the new .lil, .pdb, and .jar files when that integration server is restarted, or when an object is first deployed to it. If you restart the integration node, you must ensure that anyone with an interest in a particular integration server is made aware that recent changes have been made to the integration node.
These two scenarios assume that you have used either the mqsichangebroker command or the mqsicreatebroker command to notify the integration node of the directory in which the user-defined extension files have been placed.
To change a user-defined extension file: