PK09510: TRANSACTION IS INDEFINITELY SUSPENDED IN A FCDWWAIT ON A NON-RLS VSAM ALTERNATE INDEX.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A transaction enters a FCDWWAIT during a read using the AIX of
  a non-RLS VSAM file.  The Data Set Name Block, DSNB, associated
  with the base file has its FCTBC_0890_COUNT field set to 1, but
  the transaction that set the count field has terminated.
    The transaction's ECB should have been posted when the
  original transaction had completed it's work.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Task can suspend FCDWWAIT on READ of    *
  *                      VSAM alternate index.                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A STARTBR is issued against a VSAM alternate index and whilst
  the request is still active a READ command on the indexed file
  is issued. The READ fails with an 0890 response and gets
  suspended with FCDWWAIT and remains suspended even after the
  STARTBR request completes.
  During completion of the STARTBR command, requests that
  completed with a 0890 response and are still waiting are Posted.
  The routine that processes these waits checks the alternate
  indexes dataset DSN_BLK ( FCTDSDP ) to locate the Header Chain
  address which points to all other resources to be freed. This
  would include the resource with the FCDWWAIT.
  As the Header Chain address is actually held in the base cluster
  block ( FCTDSBCP ) a null address is returned and so the Posting
  of any outstanding waits is bypassed. The FCDWWAIT therefore
  never gets posted and remains in the system.
  This will only occur if the transaction that issued the READ
  request is defined with RECOVERY option SPURGE set to NO,
  otherwise an AFCY abend will occur.
  
  Additional Keywords: DFHDSNDS POST_0890_WAIT abendAFCY
  

Problem conclusion

• DFHFCVR has been changed so that at the beginning of routine
  POST_0890_WAITERS, DFHDSNDS is redefined based on FCTDSBCP and
  then redefined back based on FCTDSDP at the end of the routine.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PK08657

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

  UK06219

Modules/Macros

•    DFHFCVR
  

Fix information

• Fixed component name

  CICSTS 3.1 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK06219

     UP05/08/16 P F508

Fix is available

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