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PI74854: DFHRM0001 AKEC & 0C4 ABENDS FOR CLQ2 TASKS DURING RESTART 17/03/10 PTF PECHANGE

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APAR status

  • Closed as program error.

Error description

  • Various abends and loops occur in RM domain modules, usually
during CICS restarts, due to corrupted RMLK chains. The abends
include symptoms like these:
.
DFHRM0001 An abend (code ---/AKEC) has occurred at
 offset X'FFFF' in module DFHRMLK3 or DFHRMLN.
.
DFHRM0001 An abend (code 0C4/AKEA) has occurred at
 offset X'1D60' in module DFHRMRS.
.
DFHRM0001 An abend (code 0C4/AKEA) has occurred at
 offset X'4044' in module DFHRMLN.
.
DFHRM0001 An abend (code 0C4/AKEA) has occurred at
 offset X'1E6C' in module DFHRMLSO.
.
The failures occur for CLQ2 resynch tasks. The global chain of
RMLKs show that the previous/next pointers are corrupted. An
IPCS FIND command in the formatted RM domain will usually show
message:
.
** DFHPD0105  A loop has been detected. RMLKChn at address
  aaaaaaaa already encountered.
.
Additional Symptom(s) Search Keyword(s): KIXREVSCB
RMLKClss DFHRMCI3 AKEF DFHRMRO2 DFHRMLK2 DFHRMLINK RMLINK 0C4
S0C4 abend0C4 AKEC loop looping startup
AICJ ABEND
DFHSM0002 A severe error (code X'030D') in module DFHSMGF.
DFHAP0002 A severe error (code X'05CC') in module DFHICXM.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: All CICS Users with UI38223 UI38106 applied  *
****************************************************************
* PROBLEM DESCRIPTION: Abends in DFHRMRS, DFHRMLN and other    *
*                      RM domain modules due to a corrupt      *
*                      RMLK (DFHRMlink) chain.                 *
****************************************************************
After applying PTF UI38223 or UI38106 CICS regions which are
processing large numbers of recovery links during restart
can experience abends in the RM domain due to a corrupt RMLK
chain. This is because links were attempted to be removed from
the chain twice.

    



Problem conclusion


    

  • UI38106 UI38223
DFHRMLK has been changed to prevent corruption of the RMLK
chain.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PI74854
    • 

  • Reported component name
    CICS TS Z/OS V5
    • 

  • Reported component ID
    5655Y0400
    • 

  • Reported release
    900
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-01-12
    • 

  • Closed date
    2017-03-10
    • 

  • Last modified date
    2017-04-03
    • 





    

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

    • 

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

    
UI45464 UI45465
    

    • 



Modules/Macros


    

  • DFHR2TRI DFHRMCD  DFHRMCD1 DFHRMCD2 DFHRMCI2 DFHRMCI3 DFHRMCI4
DFHRMDM  DFHRMDU0 DFHRMDU2 DFHRMDU3 DFHRMDU4 DFHRMDU5 DFHRML1D
DFHRMLK1 DFHRMLK2 DFHRMLK3 DFHRMLK4 DFHRMLK5 DFHRMLKQ DFHRMLN
DFHRMLSD DFHRMLSF DFHRMLSO DFHRMLSP DFHRMLSS DFHRMLSU DFHRMNM
DFHRMNM1 DFHRMNS1 DFHRMNS2 DFHRMOT  DFHRMR1D DFHRMR1E DFHRMR1K
DFHRMR1S DFHRMRO  DFHRMRO1 DFHRMRO2 DFHRMRO3 DFHRMRO4 DFHRMROO
DFHRMROS DFHRMROU DFHRMROV DFHRMRS  DFHRMST  DFHRMST1 DFHRMTRI
DFHRMU1C DFHRMU1D DFHRMU1E DFHRMU1F DFHRMU1G DFHRMU1J DFHRMU1K
DFHRMU1L DFHRMU1N DFHRMU1Q DFHRMU1R DFHRMU1S DFHRMU1U DFHRMU1V
DFHRMU1W DFHRMUC  DFHRMUO  DFHRMUW  DFHRMUW0 DFHRMUW1 DFHRMUW2
DFHRMUW3 DFHRMUWB DFHRMUWE DFHRMUWF DFHRMUWH DFHRMUWJ DFHRMUWL
DFHRMUWN DFHRMUWP DFHRMUWQ DFHRMUWS DFHRMUWU DFHRMUWV DFHRMUWW

    



Fix information


    

  • Fixed component name
    CICS TS Z/OS V5
    • 

  • Fixed component ID
    5655Y0400
    • 



Applicable component levels


    

  • R000  PSY  UI45465
       UP17/03/16  P  F703  {
    • 

  • R900  PSY  UI45464
       UP17/03/16  P  F703  {
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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              [{"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":"5.2","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":"5.2","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            03 April 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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