IBM Support

PI84438: CICS SOS CAUSED BY DISCARD PROGRAM NOT FREEING PPTE CONTROL BLOCKS

A fix is available

Obtain the fix for this APAR.

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Storage creep in ECDSA. The size of subpool PGPPTE increased
when an user program issued an EXEC CICS DISCARD PROGRAM
command.
In this case, the customer had an admin trxn that issued
hundreds of program Discards to reduce ERDSA.
The ECDSA went up when the programs were re-installed, a new
PPTE was created for each new definition, in subpool PGPPTE.
The new PPTEs have an eyecatcher ">DFHPGPPTE".
But quick cells for PGPPTE have multiple redundant entries for
each program that has been discarded.
These redundant PPTEs start with spaces (x'40') instead of the
free cell chain pointer.
In effect, the PPTEs were not being freemained and remained
active. Eventually, the system went Short Of Storage.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: All CICS users                               *
****************************************************************
* PROBLEM DESCRIPTION: Control blocks in ECDSA not being       *
*                      FREEMAINed, causing storage creep.      *
****************************************************************
PPTE control blocks are not getting FREEMAINed in certain
scenarios following discard program commands.

    



Problem conclusion


    

  • DFHPGDD is changed so that PPTE storage is FREEMAINed within the
delete_program procedure regardless of how it is invoked.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PI84438
    • 

  • Reported component name
    CICS TS Z/OS V5
    • 

  • Reported component ID
    5655Y0400
    • 

  • Reported release
    100
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-07-13
    • 

  • Closed date
    2017-07-21
    • 

  • Last modified date
    2017-08-02
    • 





    

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

    
PI80274
    

    • 

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

    
UI48990
    

    • 



Modules/Macros


    

  • DFHPGDD

    



Fix information


    

  • Fixed component name
    CICS TS Z/OS V5
    • 

  • Fixed component ID
    5655Y0400
    • 



Applicable component levels


    

  • R100  PSY  UI48990
       UP17/07/22  P  F707
    • 



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.
    








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.4","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.4","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            02 August 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback