PI91027: ACK LOST FOR FMT MESSAGES, WHEN FTM SWIFT AT THE SENDER IS RUNNING IN A MULTI-SERVER ENVIRONMENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When FTM SWIFT is set up in a multi-server environment, and FMT
  messages are sent into FTM SWIFT in a batch, so that both broker
  servers start processing the FMT messages simultanously, 2
  messages may get assigned the same ISN.
  The messages are processed correctly on the sender and the
  receiver side, but the ACK for one of those messages is
  discarded on the sender side, as it is considered to be a
  duplicate.
  

Local fix

• the problem can be avoided by stopping the DNF_PF_IS message
  flow on one of the Broker servers
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: ACK LOST FOR FMT MESSAGES, WHEN FTM     *
  *                      SWIFT AT THE SENDER IS RUNNING IN A     *
  *                      MULTI-SERVER ENVIRONMENT                *
  ****************************************************************
  When FTM SWIFT is set up in a multi-server environment, and
  FMT messages are sent into FTM in a batch, so that both broker
  servers start processing the FMT messages simultanously, 2
  messages may get assigned the same ISN.
  The messages are processed correctly on the sender and the
  receiver side, but the ACK for one of those messages is
  discarded on the sender side, as it is considered to be a
  duplicate.
  

Problem conclusion

• To avoid a duplicate numbers a new sequence SEQIAMS is being
  introduced. This sequence creates a unique ID so that the ACK
  message will not be discarded as duplicate.
  

Temporary fix

Comments

APAR Information

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

  PI90504

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

Modules/Macros

• DNI00000
  

Fix information

• Fixed component name

  FTM SWIFT SVCS

• Fixed component ID

  5655FTB30

Applicable component levels

• R300 PSY UI55804

     UP18/05/16 P F805

Fix is available

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