PM10618: KO2CDFSA+90C ABENDDC2 RSN0055 IARV64 SHAREMEMOBJ WHEN AGENT AND LOGGED ON USER TRIED TO OBTAIN DDF DATA CONCURRENTLY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When an AGENT and LOGGED on USER tried to obtain DDF data
  concurrently, ABENDDC2 RSN0055 IARV64 SHAREMEMOBJ KO2CDFSA+90C
  R15 = 71005520.
  From the OMPE STC log:
  KO2I0170U SDC2  ABEND IN MODULE ........ PERCOLATED TO D5API
            MODULE KO2ACONB
  IEA794I SVC DUMP HAS CAPTURED:
  DUMPID=004 REQUESTED BY JOB (OMDB2OD1)
  DUMP TITLE=OMEGAMON II FOR DB2 DUMP:  TASK=COMMCOLL,ID=V410
             ,MOD=UNKNOWN ,OFFSET=      ,CODE=SDC2/71005520
  KO2I0157I D5API COLLECTOR DISCONNECTED FROM DB2 DT11 AS
            REQUESTED BY AGENT OMDB2XD1
  KO2I0154I D5API COLLECTOR CONNECTED TO DB2 DT11 ON BEHALF OF
            AGENT OMDB2XD1
  
  ABENDDC2 rsn71005520 (xx0055xx) because a duplicate UToken
  already exists for the memory object specified for the address
  space.  SYSTRACE shows the following:
  0077E3D0 PC  ...   7        00_41714141 0090E IarV64
  0077E3D0 SSRV 14B  0A804001 00000DC2 71005520 IarV64 ShareMemObj
                              00000000_4623CEB8
                              00000300_A0104580
                              0000000F_D9D8C140 <-- UToken
  0077E3D0 *SVC   D  070C5000 818E07F0 71005520 84000000 84DC2000
  ... with the address 41714140 pointing to KO2CDFSA+90C (at
      PK80926 level).
  A few SYSTRACE entries earlier, the TCB at 007B7118 issued
  007B7118 PC ...    7        00_41714141 0090E IarV64
  007B7118 SSRV 14B  0A804001 00000000 00000000 IarV64 ShareMemObj
                              00000000_44FFC4D0
                              00000300_A0104580
                              0000000F_D9D8C140 <-- UToken
  At the time that the SVC DUMP was generated, TCB 007B7118 had
  yet to issue an IarV64 Detach, meaning the USERTKN of
  0000000F_D9D8C140 was still in use.
  When KO2CDFSA issued the IARV64 REQUEST=SHAREMEMOBJ,
                                  USERTKN=USRTKNS, ...
  it did not check for USERTKN being unique.
  .
  Additional symptom:
  An SVC dump occurred with this dump title:
  Dump Title: OMEGAMON II FOR DB2: COMPID=5655OPE00, JOB=CANSO2  ,
               LMOD=KO2CDB2A#L, CSECT=#UNKNOWN, OFFSET=012C3E
  ABEND0C4 rc3B occurred in KO2CDFSA+C1E (at R420 PK87445 level)
  on a CLC instruction with DPSBRQAP RQA pointer above the bar.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: OMEGAMON XE for DB2 PE/DB2PM                 *
  *                 users of component:                          *
  *                 -   Tivoli Enterprise Monitoring Agent       *
  *                 -   Classic Interface                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABENDDC2 KO2CDSFA+90C RSN0055 IARV64    *
  *                      SHAREMEMOBJ WHEN AGENT AND LOGGED ON    *
  *                      USER TRIED TO OBTAIN DDF DATA           *
  *                      CONCURRENTLY                            *
  ****************************************************************
  * RECOMMENDATION: Apply this PTF                               *
  *                                                              *
  ****************************************************************
  PROBLEM SUMMARY:
  WHEN AGENT AND LOGGED ON USER OBTAIN DDF DATA CONCURRENTLY THEY
  CAN TRY TO RECEIVE SHAREMEMOBJ ACCESS WITH THE SAME ID.
  
  PROBLEM CONCLUSION:
  CHANGE LOGIC TO GENERATE THE UNIQUE ID FOR ANY REQUEST OF
  SHAREMEMOBJ.
  

Problem conclusion

• CHANGE LOGIC TO GENERATE THE UNIQUE ID FOR ANY REQUEST OF
  SHAREMEMOBJ.
  
  KEYWORDS : ABENDDC2 KO2CDSFA+90C RSN0055 IARV64  DDF DATA
  

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:

  UK58000 UK58001

Modules/Macros

• KO2CDFSA KO2CDFSS KO2CDFS2 KO2XTHSA KO2XTHSS
  KO2XTHS2
  

Fix information

• Fixed component name

  OM XE DB2PE/PM

• Fixed component ID

  5655OPE00

Applicable component levels

• R410 PSY UK58000

     UP10/06/28 P F006

• R420 PSY UK58001

     UP10/06/28 P F006

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.