Using the LIST parameter, you can determine that a catalog request task is taking too much time to execute. If your resource monitor program indicates you have an enqueue lockout on a resource held by CAS, the listing gives you the ID of the task with the enqueue. You might want to use the MODIFY command with the LISTJ and DETAIL keywords to get more information about the associated catalog request.

In these situations, you will want to end the task. Sometimes redriving the task allows the request to be successfully satisfied, especially if there is an enqueue lockout. The timing of the resource requests on the redrive are probably different than when the enqueue occurred, so that the requests are satisfied.

Use the following procedure to end a catalog request task:

1. Use MODIFY CATALOG, LIST to obtain the task ID or address.
2. If you are trying to end the CAS allocate, analysis, or modify task, skip this step. If you are trying to end a user task, use one of the following commands:
   1. Use MODIFY CATALOG,END(xx){REDRIVE} if the task is in enqueue lockout, or you want the request to be redriven.
   2. Use MODIFY CATALOG,END(xx){NOREDRIVE} if you want to permanently end the task.
   3. Use MODIFY CATALOG,END(xx){REDRIVE|NOREDRIVE}[FORCE] if you want to end a task abnormally, even if it is in recall.

      Restriction: Do not use FORCE unless the address space or task that the service task is operating on behalf of has ended abnormally. You can use the MODIFY CATALOG,LIST command to find the name of the user job and task the service task is processing.

3. If the preceding step failed, or you skipped it, use MODIFY CATALOG,ABEND(id)[,FORCE] to end the task and redrive the request once.
   Restriction: Do not use FORCE unless the address space or task that the service task is operating on behalf of has ended abnormally.