COF540E DLF SHOULD BE STOPPED - ERROR THRESHOLD EXCEEDED.

Explanation
 Data lookaside facility (DLF) processing should
be stopped because the DLF error threshold for the number of errors
related to the connection or disconnection of a single DLF object
has been exceeded. There is a possibility of damage to the DLF data
structures, so DLF should be stopped and restarted when possible.
This message only indicates that there is presumed damage, not that
there is any certainty of actual damage to data structures.

System action
 DLF continues to operate. This action message
will remain until DLF is stopped or the operator deletes it from the
console. The system writes a logrec data set error record. The system
may write an SVC dump.

Operator response
 At the earliest opportunity, the workload
using shared data objects should be drained by whatever means is appropriate
to your installation. Select a DLF stop option (DRAIN or QUIESCE)
with a MODIFY DLF,MODE=DRAIN|QUIESCE command and then enter the STOP
command to stop DLF.
 Contact the system programmer.

System programmer response
 Examine the logrec data set for information
about failures which have occurred in DLF functions. Examine the SVC
dump, if available. See Formatting DLF dump data in z/OS MVS Diagnosis: Reference for
information about DLF traces and IPCS reports that may be helpful
for diagnosing this problem.

Module
 COFMISDO

Source
 Data lookaside facility (DLF)

Routing Code
 1,10

Descriptor Code
 11