PH05816: FASTPATH NOTIFY DIAGNOSTICS ( DFS0066I ) DON'T INCLUDE UOW LOCK MODE TRANSITION SUPPORT. CUSTOMER NEEDS THIS FOR DIAGNOSTICS.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Message DFS0066I was added in IMS V12 to help customers diagnose
  Fastpath NOTIFY response issues in datasharing complex.
  Unfortunately, the support added did not include the NOTIFY
  processing involved in UOW Lock Mode transition. In this case,
  partner systems allow 15 seconds for all CI locks on Area to
  be released, and if this time is exceeed, reply 'TIMEOUT' to
  the NOTIFY. The DFS0066I logic is essentially looking for
  missing responses, not 'TIMEOUT' responses and no DFS0066I
  messages are issued in the case where one or more partners
  respond timeout. DBFICLI0 should be changed to issue a new
  version of DFS0066I ( or a new message ) indicating that a
  TIMEOUT response has been received for a UOWL NOTIFY message.
  This will allow customer to determine which system in the group
  is still holding CI locks on the Area and use local diagnostic
  tools to find the lock owner, and take appropriate action.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IMSFP V15 DEDB data sharing users.                           *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * FASTPATH NOTIFY DIAGNOSTICS ( DFS0066I ) DON'T INCLUDE UOW   *
  * LOCK MODE TRANSITION SUPPORT. CUSTOMER NEEDS THIS FOR        *
  * DIAGNOSTICS.                                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * INSTALL CORRECTIVE SERVICE FOR APAR/PTF                      *
  ****************************************************************
  Message DFS0066I was added to help customers diagnose Fastpath
  NOTIFY response issues in datasharing complex. Unfortunately,
  the support added did not include the NOTIFY processing involved
  in UOW Lock Mode transition. In this case, partner systems allow
  15 seconds for all CI locks on Area to be released, and if this
  time is exceeed, reply 'TIMEOUT' to the NOTIFY. The DFS0066I
  logic is essentially looking for missing responses, not
  'TIMEOUT' responses. No DFS0066I messages are issued in the case
  where one or more partners respond timeout. DBFICLI0 should be
  changed to issue a new message indicating that a TIMEOUT
  response has been received for a UOWL NOTIFY message. This will
  allow customer to determine which system in the group is still
  holding CI locks on the Area and use local diagnostic tools to
  find the lock owner, and take appropriate action.
  

Problem conclusion

• The following change has been made to correct the reported
  problem:
  DBFICLI0:  Add code to display message DFS4888I when an IMS
  receives 'TIMEOUT' response from a partner system for an UOW
  Lock Mode transition notify.
             DFS4888I UOW LOCK NOTIFY RECEIVED TIMEOUT RESPONSE
  FROM ims_id
  ----------------------------------------------------------------
  --
  GC27-6789-00  IMS V15 Messages and Codes, Volume 1:  DFS
  Messages
  New message DFS4888I
  
  DFS4888I UOW LOCK NOTIFY RECEIVED TIMEOUT RESPONSE FROM ims_id
  
  Explanation
  
  IMS Fast Path has a sysplex communication protocol, which
  utilizes the IRLM notify process to communicate with all sharing
  IMS subsystems in the sysplex. IMS waits until all IMS
  subsystems respond to the sysplex communication protocol, or
  until the initiating IMS times out the notification, and then
  terminates the requested function.  This IMS sends a UOW lock
  mode transition (UOWL) message to other sysplex member due to
  high speed sequential processing (HSSP) or high speed
  reorganization (HSR).  The partner systems allow 15 seconds for
  all CI locks on Area to be released, and if this time is
  exceeded, reply with 'TIMEOUT' to the NOTIFY.
  
  In the message text:
  
  ims_id
  
      The IMS ID of the sysplex that successfully returned a
  timeout response to the UOW lock mode transition message.
  System programmer response:
  
      This IMSID is still holding CI locks on the Area. Use local
  diagnostic tools to find the lock owner(s) and take appropriate
  action.
  Module: DBFICLI0
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

  PH03605

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

  UI60449

Modules/Macros

• DBFICLI0
  

Fix information

• Fixed component name

  IMS V15

• Fixed component ID

  5635A0600

Applicable component levels

• R500 PSY UI60449

     UP19/01/04 P F901 ¢

Fix is available

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