PH40932: MQ MONITORS DO NOT START AT STARTUP, NO DFHMQ0391 "START REQUESTED FOR MQMONITOR" OR ERRORS OCCUR.

APAR status

• Closed as program error.

Error description

• Periodically on CICS startup, the MQMonitors do not start.
  There are no errors or indications that there was an attempt to
  start them. However, shortly after control is given to CICS
  there is a DFHMQ0371 message;
  
  23.51.53 STC78007  +DFHSI1517 applid Control is being given to
  CICS.
  ..
  DFHMQ0371 I 06/19/2021 23:51:57 applid MQMONITORs no longer have
  a restriction on the number of MQGETs that can be issued per
  
  Message DFHMQ0371 should only be issued under certain
  conditions;
  
  
  a)  WLMHEALTH=OPEN and HEALTH is 100%.
  
  or
  
  b) MQMonitors are no longer MXT restricted. In this case CKAM
  has been notified that the region is no longer at MXT, but there
  is no message DFHMQ0370 stating gated due to MXT which should
  have occurred.
  
  
  The problem is that when control returned from loading DFHMQMON,
  CKAM was able to start executing and found that the bit
  indicating that CICS was no longer at MXT had been set, issued
  message DFHMQ0371 and bypassed the code for checking MQMmonitors
  so they did not start.
  
  Additional symptoms:
  KIXREVEAA
  DFHMQ0371
  DFHMQ0370
  DFHMQ0391
  mq monitor
  

Local fix

• Start mq monitors manually.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: MQMonitors may fail to start during     *
  *                      CICS initialisation.                    *
  ****************************************************************
  * RECOMMENDATION: None                                         *
  ****************************************************************
  During CICS startup, MQMonitors may fail to start when CICS
  exits a MXT condition.
  
  CKAM is bypassing the code to start the MQMonitors because a
  flag incorrectly indicated the MQMonitors startup had already
  completed.
  
  This is externalised by message DFHMQ0371 being issued with
  no preceding DFHMQ0370.
  
  Keywords: msgDFH0370 MQ0370 msgDFH0371 MQ0371
  

Problem conclusion

• DFHMQMON has been changed to ensure the MQmonitor start process
  is run when exiting a MXT condition.
  

Temporary fix

Comments

• ×**** PE23/04/18 FIX IN ERROR. SEE APAR PH53978  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI77794 UI77795

Modules/Macros

• DFHMQMON
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R200 PSY UI77795

     UP21/10/26 P F110

• R300 PSY UI77794

     UP21/10/26 P F110