PH68573: CONCURRENTLY EXECUTING MIGRATES CAN INCORRECTLY INTERMIX THEIR COMMANDS, THEREBY PROCESSING COMMANDS OF ONE PACKAGE BY ANOTHER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Two MIGRATEs are executed at the same time, each containing
  processing commands.  Depending upon the exactness of timing
  within the code, commands for one package may be duplicately
  processed by the other package, leading to various anomalies,
  which can include:
  
  1. The package MIGRATE history may include resources
  processed by add, delete or remove commands unrelated
  to the package.
  
  2. One of the MIGRATEs can complete RC=04 RSN=00CB (some
  migrate commands ignored), if the command has been
  previously executed by the other concurrent MIGRATE.
  
  3. If an incorrectly processed command triggered a Group
  delete, the LISTs updated owing to the Systems Option
  'Automatic remove of deleted Groups from CSD Lists'
  can be attributed to the wrong package.
  
  4. A MIGRATE adversely affected by the command processing
  may suffer RC=8 and therefore trigger automatic BACKOUT
  processing.  BACKOUT may be incomplete, as the journal
  history records required for recovery are associated with
  the wrong package.
  
  
  Owing to the exactness of timing within the code triggering
  the error condition, problem reproduction is more likely to
  occur (but not limited to) the updating of large LISTs owing
  to a resource delete when the Systems Option
   'Automatic remove of deleted  Groups from CSD Lists'
  is active.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of CICS Configuration Manager      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Concurrently executing MIGRATEs can     *
  *                      incorrectly intermix their commands,    *
  *                      thereby processing commands of one      *
  *                      package by another package.             *
  ****************************************************************
  Two MIGRATEs are executed at the same time, each containing
  processing commands. Depending upon the exactness of timing
  within the code, commands for one package may be duplicately
  processed by the other package, leading to various anomalies,
  which can include:
  
    1. The package MIGRATE history may include resources processed
       by add, delete or remove commands unrelated to the package.
  
    2. One of the MIGRATEs can complete RC=04 RSN=00CB (some
       migrate commands ignored), if the command has been
       previously executed by the other concurrent MIGRATE.
  
    3. If an incorrectly processed command triggered a Group
       delete, the LISTs updated owing to Systems Option
       'Automatic remove of deleted Groups from CSD Lists' can be
       attributed to the wrong package.
  
    4. A MIGRATE adversely affected by the command processing may
       suffer RC=8 and therefore trigger automatic BACKOUT
       processing. BACKOUT may be incomplete, as the journal
       history records required for recovery are associated with
       the wrong package.
  
  Owing to the exactness of timing within the code triggering the
  error condition, problem reproduction is more likely to occur
  (but not limited to) the updating of large LISTs owing to a
  resource delete when the Systems Option 'Automatic remove of
  deleted Groups from CSD Lists' is active.
  

Problem conclusion

• CICS Configuration Manager is corrected. MIGRATE processing is
  corrected to ignore commands not associated with the change
  package for migration.
  

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:

  UO05459

Modules/Macros

• CCVAMG70
  

Fix information

• Fixed component name

  CICS CONFIG MGR

• Fixed component ID

  5697CIC00

Applicable component levels

• R540 PSY UO05459

     UP25/10/24 P F510

Fix is available

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