PH53919: EYUXC0028W AND EYUXC0023S ISSUED IN CPSM CMAS. CMAS WILL TERMINATE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You are running CPSM with a large CICSplex and have many
  (hundreds of thousands and even millions) of resources defined
  across many MASes. As you update (add, change, delete) these
  definitions and where they are deployed, your CMAS may issue
  these messages and terminate:
  
  EYUXC0028W Data space total storage allocation for
  
            component BAS has exceeded ##%.
  EYUXC0023S Maximum data cache limit has been reached
  
            for BAS cache.
  
  
  You are running with the CICS toggle feature
  com.ibm.cics.cpsm.bas.largecicsplex=false which is the default.
  You may even be running with EYUPARM CACHEDSNUM in the CMAS set
  larger than the default of 2, and the issue could still occur.
  

Local fix

• Set CICS toggle feature com.ibm.cics.cpsm.bas.largecicsplex=true
  for the CMASes in your CICSplex
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICSPlex SM Users                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: The CMAS shuts down after modification  *
  *                      to BAS resources.                       *
  *                      Messages EYUXC0023S and EYUXC0024S are  *
  *                      issued.                                 *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF which resolves        *
  *                 PH53919 all CMAS regions must be restarted.  *
  *                 The restarts can occur in any order.         *
  ****************************************************************
  An attempt is made to modify the set of resources to be
  installed by BAS into one or more CICS regions. This results
  in a change to the BAS resource install cache list.
  This cache list is extremely large due to the number of
  resources and CICS systems in the CICSplex, and the change
  means that the list has to be moved to a new memory location in
  order that it can be expanded, while still remaining in
  contiguous storage.
  
  Cache method XCBA (EYU0XCBA) is called to allocate a new area
  of data cache storage from an available data space.
  Method XCEC (EYU0XCEC) is called to extend the cache.
  This means to grow the data space by using the DSPSERV
  service to request additional blocks of storage be assigned.
  
  Due to a logic error, XCEC makes a request that would take the
  total allocation to more than the maximum permissible number
  of blocks.
  
  The request for new storage fails, even though it could have
  been satisfied with the remaining blocks available.
  

Problem conclusion

• XCEC has been updated to ensure that it does not request
  more than the maximum possible total number of blocks per
  data space.
  

Temporary fix

Comments

APAR Information

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

  PH53161

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

  UI91575

Modules/Macros

• EYU0UCEC EYU0XCEC
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R40M PSY UI91575

     UP23/04/28 P F304

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.