The kernel keeps track of latch contention caused by z/OS UNIX user tasks and takes action if a latch causing contention has been held for an excessive amount of time. If the problem is not corrected, an error message is issued, and you will be asked to issue the D GRS operator command to gather information about the latch resource, latch owners, and latch waiters. Try using the methods described in Steps for ending a specified process to end the latch contention.

If the latch contention is not ended, then use the F BPXOINIT,RECOVER=LATCHES operator command. It ends user tasks that are holding latches for an excessive period of time. Only individual tasks are ended, not entire processes.