IT17927: IMS CALLOUT HANDLER MIGHT DELAY SENDING RESPONSE BACK TO IMS CONNECT SERVER.

Fix packs for DataPower Gateway version 7.2
Fix packs for DataPower Gateway version 7.5
Fix packs for DataPower Gateway version 7.5.1
Fix packs for DataPower Gateway version 7.5.2

APAR status

• Closed as program error.

Error description

• While processing IMS Callout transactions, DataPower might delay
  (up to 5 seconds) sending back a response message to the IMS
  Connect server even though the DataPower system and latency logs
  show the transaction has completed in time. The delay is in
  getting a new response connection created when the connection
  pool is empty. This behavior can lead to late delivery of
  response messages triggering a DataPower error message similar
  to the following:
  
  [0x8c800015][ims][error] source-ims-callout(IMS_Callout_FSH):
  Fail to deliver response (length: 1748, correlation token
  0x0028XXXXXXXXXXXXXXXXXXXXXXXXXX). Error: imsConnectReturnCode =
  [16] imsConnectReasonCode = [0] otmaSenseCode        =
  [53]otmaReasonCode       = [1].
  
  If the IMS Callout Handler is configured with a response
  concurrency of 1 and this issue occurs, response messages might
  get queued up and delivered by the IMS Callout Handler one at a
  time with 5 seconds in between each delivery.
  
  This behavior might be triggered upon first late delivery of a
  response message by the IMS Callout Handler due to increased
  latency on DataPower while processing the transaction.
  

Local fix

Problem summary

• DataPower user who uses IMS Callout Front Side Handler may
  take more time to respond the message, if it fails to deliver
  the response.
  

Problem conclusion

• Fix is available in 7.2.0.11, 7.5.0.5, 7.5.1.4 and 7.5.2.2
  
  For a list of the latest fix packs available, please see:
  http://www-01.ibm.com/support/docview.wss?uid=swg21237631
  

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:

Fix information

• Fixed component name

  DATAPOWER

• Fixed component ID

  DP1234567

Applicable component levels

• R720 PSY

     UP

• R750 PSY

     UP

• R751 PSY

     UP

• R752 PSY

     UP