IT30023: MMMOUNT MIGHT HANG UPON A FAILOVER DUE TO AN OBSOLETE SPACE MANAGEMENT CLIENT DMAPI SESSION

APAR status

• Closed as program error.

Error description

• The Spectrum Scale (GPFS) mmmount command might hang trying to
  mount an LTFS file system upon a failure / reboot of the GPFS
  node where the Space Management (HSM) client had been running.
  During an automatic HSM failover operation caused by the GPFS
  failure, to mitigate possible problems with destroy of GPFS
  DMAPI sessions, the Space management client should have forcibly
  cleared the mount event disposition for the dsmrecalld DMAPI
  session that belonged to the failed/failing node.
  As a result, the dsmrecalld DMAPI session might not be destroyed
  and became obsolete, so that any subsequent mount GPFS DMAPI
  event would hang waiting for an HSM response that would never
  come.
  
  
  Customer/Support Diagnostics:
  In dsmerror.log, on the takeover HSM client node:
  ANS9531E dsmrecalld: cannot create a DM session: old session =
  5D30AC1E session info = dsmrecalld.
  Reason : File exists
  

Local fix

• Restart LTFS and Spectrum Scale on the primary control node
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect for Space Management (HSM) client       *
  * versions 7.1.x and 8.1.x on AIX GPFS and Linux GPFS          *
  * platforms                                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is projected *
  * to be fixed in HSM client level 8.1.9. Note that this is     *
  * subject to change at the discretion of IBM.                  *
  ****************************************************************
  

Problem conclusion

• The problem has been fixed so that it no longer occurs.
  

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

  TSM SPACE MGMT

• Fixed component ID

  5698HSMCL

Applicable component levels