PH51855: IBM MQ Z/OS: ABEND378-00000024 DUE TO AN INCORRECT LENGTH FOR A RELEASE IN CSQISTOP WHEN A DIAGNOSTIC STORAGE OPTION IS ACTIVE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In the syslog, an error appears as:
  
  DUMP TITLE=CSQ1,ABN=378-00000024,U=SYSOPR  ,C=MQ900.930.DMC -CS
             QISTOP,M=CSQGFRCV,PSW=070C1000nnnnnnnn,ASID=nnnn
  
  and in a dump, the dump title appears as:
  
  CSQ1,ABN=378-00000024,U=SYSOPR  ,C=MQ900.930.DMC -CSQISTOP,M=CSQ
  GFRCV,PSW=070C1000nnnnnnnn,ASID=nnnn
  
  Reason code 24 means "In the private area, the area specified on
  a FREEMAIN or STORAGE RELEASE is larger than the area specified
  on the original GETMAIN or STORAGE OBTAIN. The FREEMAIN or
  STORAGE RELEASE start address is not valid."
  
  The Storage Release is from CSQISTOP+x'642' in routine
  FREE_CLUSTER_RESOURCES.  The storage being released has an
  eyecatcher of RCAH (repository cache header).  The length for
  the release is 00400000, but VSMDATA shows that the storage
  only has a length of 00200000.
  
  The length of the RELEASE is for rfxCACHE_BLOCK.lSize * 2, so
  it is double the size of the storage.  Normally this works as
  the RELEASE is conditional.  However, with an internal
  diagnostic trap IGVUNCOND turned on, the RELEASE is treated as
  unconditional and fails.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0,                    *
  *                 Release 2 Modification 0, and                *
  *                 Release 3 Modifidation 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 378-24 occurs in CSQISTOP during  *
  *                      queue manager shutdown when diagnostic  *
  *                      traps are enabled, resulting in the     *
  *                      queue manager ending abnormally 6C6     *
  *                      with REASON=00E80100, instead of        *
  *                      ending normally.                        *
  ****************************************************************
  During queue manager shutdown CSQISTOP attempted to release
  storage associated with the cluster cache, however due to
  incorrect parameters being provided the ?STORAGE RELEASE request
  fails.
  Normally this does not cause a problem, and the storage is
  implicitly released by address space termination, however when
  diagnostic traps are enabled the failure results in the
  reported abend occurring instead.
  

Problem conclusion

• CSQISTOP is changed to pass the correct parameter values to the
  affected ?STORAGE RELEASE.
  

Temporary fix

Comments

APAR Information

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

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

  UI93245 UI93246 UI93247

Modules/Macros

• CSQISTOP
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI93247

     UP23/10/10 P F310

• R200 PSY UI93246

     UP23/10/10 P F310

• R300 PSY UI93245

     UP23/10/10 P F310

Fix is available

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