IT26264: DB2CLUSTER -CFS -ENTER -MAINTENANCE MIGHT FAIL WITH 2610-602 RSCT ERROR

Db2 Version 11.1 Mod4 Fix Pack4 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 4 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• After "db2cluster -cm -enter -maintenance" successfully
  completed, "db2cluster -cfs -enter -maintenance" might fail with
  2610-602 RSCT error when mc_start_session() RSCT api is issued
  inside the db2cluster command. But "db2cluster -cfs -enter
  -maintenance" do not retry the api. It is the problem which this
  APAR focuses.
  
  note : The root cause of 2610-602 RSCT error should be analyzed
  in each case.
  
  When the error occur, you might see error messages similar to
  the following :
  
  Opening a session to the cluster manager failed. Refer to the
  diagnostic logs (db2diag.log for the current member or
  /tmp/ibm.db2.cluster.*) and the DB2 Information Center for
  details.
  Unable to enter file system maintenance mode on the local host.
  See the DB2 Information Center for more details.
  A diagnostic log has been saved to
  '/tmp/ibm.db2.cluster.3evMaa'.
  
  The diagnostic log might contain :
  
  2018-08-11-08.09.41.273910+540 I1914A420      LEVEL: Error
  PID   : 16384392       TID : 1       PROC : db2cluster
  INSTANCE: xxxxxxxx       NODE : 128
  HOSTNAME: xxxxxxxx
  EDUID  : 1
  FUNCTION: DB2 UDB, high avail services, getLastErrMsg, probe:327
  DATA #1 : signed integer, 4 bytes
  2
  DATA #2 : String, 84 bytes
  Line # : 327--- 2610-602 A session could not be established with
  the RMC subsystem.
  

Local fix

• Rerun "db2cluster -cfs -enter -maintenance".
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 4 Fixpack 4 or higher                *
  ****************************************************************
  

Problem conclusion

• First fixed in DB2 Version 11.1 Mod 4 Fixpack 4
  

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:

  IT26323

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

     UP