PK51270: RSR TRACKING IMS /CHE FREEZE SHUTDOWN HUNG IN FP DB TRACKER

APAR status

• Closed as program error.

Error description

• RSR Tracking IMS /CHE FREEZE shutdown went into hung in FP.
  MODIFY STOP, /ERE, and /CHE FREEZE again succeeded.
  - DFSCST00 itask wait in DFSTRM00 (UQ61540) at offset +A4E,
         near label TRM1300, waiting for LogRouter termination
  - DFSLRMST itask wait in DFSLRTRM (UQ69610) at offset +ABE
        Waiting for final shutdown milestone to be taken
  - DFSLRMIL itask wait in DBFDT290 (UQ88116) at offset +44E
        near label PURGE_CHECK2. ECB = EDBTMILE_PURGECOMP_ECBP
  EDBT_IOTI_CCNT (IOTICCNT) had 00000001, which means one last
  IOTI itask (DBFDT400) was active/running. All 100 IOTI itasks
  were however IDLE WAIT with ioti1slp flag on.
  There's a small timing window in shutdown milestone processes
  between DBFDT292 and DBFDT400.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V7 FastPath RSR users                *
  ****************************************************************
  * PROBLEM DESCRIPTION: One IOTI ITASK did not terminate        *
  *                      and tracking IMS did not shutdown       *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  At shutdown time, 1 of 100 IOTI ITASK did not get posted
  with TRM function and the tracking IMS did not shutdown.
  It happened when the LAST_IOTI subroutine of DBFDT400
  cannot post back END_MILESTONE process of DBFDT290.
  

Problem conclusion

• AIDS: RIDS/FP RIDS/CNTRL FP CNTRL
    GEN:
  RSRTAKEOVER
  
  *** END IMS KEYWORDS ***
  DBFDT400
  
  When the LAST_IOTI subroutine is called, MILE_POST_DONE field
  will be turned on unconditionally and when
  EDBTMILE_PURGECOMP_ECBP = 0, last_ioti subroutine can post
  back DBFDT290 and it can complete termination process.
  

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:

  PK52950 PK52951 PK52952 UK29405

Modules/Macros

• DBFDT400
  

Fix information

• Fixed component name

  IMS V7

• Fixed component ID

  5655B0100

Applicable component levels

• R700 PSY UK29405

     UP07/09/27 P F709