IC76046: FREQUENT RSS ACK TIMEOUT WHEN INDEX LOGGED PAGES WERE TRANSFERRED FROM PRIMARY

APAR status

• Closed as program error.

Error description

• During the entire period where index logged pages were sent from
  primary,
  RSS experienced disconnect/connect frequently as result of ACK
  timeout.
  This causes RSS to be out of sync and data on secondary was
  continously delayed.
  
  15:33:31  RSS online_eprstressrss_ha55_ttcp ACK timeout
  15:34:16  RSS online_eprstressrss_ha55_ttcp has resumed
  acknowledgement
  15:34:30  Logical Log 818 Complete, timestamp: 0x201f9c74.
  15:35:30  RSS online_eprstressrss_ha55_ttcp ACK timeout
  15:35:35  RSS online_eprstressrss_ha55_ttcp has resumed
  acknowledgement
  15:36:49  RSS online_eprstressrss_ha55_ttcp ACK timeout
  15:37:31  RSS online_eprstressrss_ha55_ttcp has resumed
  acknowledgement
  15:37:51  Checkpoint Completed:  duration was 1 seconds.
  15:37:51  Fri Apr  1 - loguniq 819, logpos 0x5bd300b0,
  timestamp: 0x20255bd4 Interval: 34259
  15:37:51  Maximum server connections 3
  15:37:51  Checkpoint Statistics - Avg. Txn Block Time 0.000, #
  Txns blocked 1, Plog used 92, Llog used 616091
  15:38:55  RSS online_eprstressrss_ha55_ttcp ACK timeout
  15:39:09  Logical Log 819 Complete, timestamp: 0x20274f87.
  15:39:31  RSS online_eprstressrss_ha55_ttcp has resumed
  acknowledgement
  15:42:17  RSS online_eprstressrss_ha55_ttcp ACK timeout
  15:42:25  RSS online_eprstressrss_ha55_ttcp has resumed
  acknowledgement
  15:42:53  Checkpoint Completed:  duration was 1 seconds
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of MACH11 with RSS servers.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Update to IBM Informix Server 11.50                          *
  *                                                              *
  * Upgrade to IDS 11.50.xC9 when available.                     *
  ****************************************************************
  

Problem conclusion

• Problem Fixed In IBM Informix Server 11.50
  
  Fixed in IDS 11.50.xC9.
  

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

  INFORMIX SERVER

• Fixed component ID

  5725A3900

Applicable component levels

• RB50 PSY

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