Before JES2 can be shut down for maintenance purposes, part of z/OS UNIX must be shut down. This topic explains how you can terminate all of the forked processes without having to reIPL the entire system. (The kernel remains active but new forked processes are not allowed.) Use this procedure for JES2 maintenance only.

Guideline: Do the partial shutdown as infrequently as possible because it is a disruptive shutdown; all the user processes that are either forked or non-local spawned are terminated.

After the forked processes have been terminated, you can end the colony address spaces. Now JES2 can be shut down for maintenance. z/OS UNIX can be reinitialized after JES2 has been restarted, and forked processes will start being dubbed again. The file system colonies can then be restarted manually.