PK44118: SERVICE FLOW IVP ABENDS WITH AFCG ABEND IN LINK3270 BRIDGE FUNCTION

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Trace shows the failing transaction is CMAM. Module DFHMAVCL
  does a READ UPDATE INTO command against file DFHMALVA. This is
  followed by a WRITE command for the same file, with no REWRITE
  between the two. CICS detects SELF_DEADLOCK_DETECTED. AbendAFCG
  is produced but the IVP has a HANDLE ABEND set to handle the
  abend. The IVP continues to run and exercise other functions.
  Only the Link3270 Bridge function fails.
  

Local fix

• Code CILOCK=NO in the DFHSIT.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of CICS SFR.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend AFCG when running CMAM.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In the reported problem the Installation Verification Program
  (transaction CMAM) was being run to verify the LINK3270 adapter
  in a CICS SFR region. The transaction abended AFCG (self
  deadlock detected). This is because a path existed in DFHMAVCL
  where file control requests for different records would occur
  against the same CI. This only happens when CILOCK=YES is
  specified.
  

Problem conclusion

• DFHMAVCL has been modified by the addition of an EXEC CICS
  UNLOCK between the relevant file control requests.
  

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:

  UK29312

Modules/Macros

•    DFHMAILV DFHMAVCL
  

Fix information

• Fixed component name

  SERVICE FLOW FE

• Fixed component ID

  5655M1502

Applicable component levels

• R200 PSY UK29312

     UP07/09/19 P F709

Fix is available

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