Troubleshooting › Global Data Integrity Facility Problems › ENQ and RESERVE Hangs

ENQ and RESERVE Hangs

If you experience a “hang” rather than a delay, we recommend that you gather the following information:

1. Issue the following commands on all systems:

   F MIMGR,DISPLAY CONFLICTS
   F MIMGR,DISPLAY RESERVES
   

   Note: For examples of the CA MIM displays that result from issuing DISPLAY commands, see the Command and Statement Reference.

2. Issue the following z/OS command on all systems:

   D GRS,C
   

3. Issue the following command to verify the complex is synchronized:

   F MIMGR,DISPLAY SYSTEMS 
   

4. After analyzing the output from the previous displays, determine which systems are involved. Then take SVC dumps on each system of:
   • CA MIM address space
   • Any job or started task that appears involved

   Notes:

   • Multiple address spaces can be dumped using the MIM SYSDUMP command, and this is the preferred method.
   • For more information on the SYSDUMP command, see the Statement and Command Reference Guide.
5. Issue the following command on all systems:

   F MIMGR,DISPLAY QNAMES
   F MIMGR,DISPLAY EXEMPT
   F MIMGR,DISPLAY COUNTS
   F MIMGR,DISPLAY FACILITIES