IJ22296: POWERHA NODE FAILURE DUE TO CTHAGS FAILURE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Starting in AIX 7.1.5.0 and 7.2.2.0 (RSCT 3.2.3.0), the
  cthags subsystem can fail and exit as a result of an
  underlying failure to successfully query the interface
  states from the CAA layer of AIX.
  
  When this failure occurs, a GS_TS_RETCODE_ER error will
  be logged in the errpt, with a diagnostic explanation
  similar to "hats connection has a problem with
  hb_errno = 1"
  Because cthags is a critical subsystem for PowerHA
  functionality, such a failure will cause the node to
  be shut down to protect resource (data) integrity.
  

Local fix

Problem summary

• In RSCT 3.2.3.0 and higher, Group Services (cthags) can suffer
  a failure and exit due to an underlying interface state query
  to the CAA layer in AIX.  A failure of this subsystem cannot
  be tolerated by PowerHA or VIOS SSP, and will result in a
  node failure in either cluster type.
  

Problem conclusion

• With this fix, cthags will register that the error occurred,
  but will adapt to the situation and keep running.
  

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

  RSCT FOR AIX

• Fixed component ID

  5765F07AP

Applicable component levels

• R325 PSY U890386

     UP22/01/26 I 1000

PTF to Fileset Mapping

• U886893 rsct.basic.rte 3.2.5.2

• U886893 rsct.basic.rte 3.2.5.2

• U886893 rsct.basic.rte 3.2.5.2