IT17170: PROCESS HANGS WAITING FOR FILE LIBRARY INPUT VOLUME AFTER A STORAGE AGENT USES THE SAME VOLUME FOR INPUT.

8.1.1.100-IBM-SPOC-WindowsX64
8.1.1.100-IBM-SPOC-Linuxx86_64
8.1.1.100-IBM-SPOC-Linuxs390x
8.1.1.100-IBM-SPOC-AIX
8.1.1.000-IBM-SPSRV-WindowsX64
8.1.1.000-IBM-SPSRV-Linuxs390x
8.1.1.000-IBM-SPSRV-AIX
8.1.1.000-IBM-SPSRV-Linuxx86_64
IBM Spectrum Protect Server V8.1 Fix Pack 1 (V8.1.1) Downloads
IBM Spectrum Protect Server V7.1 Fix Pack 8 (7.1.8.000) Downloads

APAR status

• Closed as program error.

Error description

• When a a storage agent acquires a volume for input it is not
  maintaining the list of volume waiters so the request for the
  volume gets lost. This can only happen for file storage pools
  between input volumes for the storage agent, and the server data
  movement operations like migration, reclamation, MOVE DATA, and
  MOVE NODEDATA.
  .
  Since the volume waiter has been lost the QUERY PROCESS will
  show the process requesting the volume waiting indefinitely
  for the volume to be mounted. The the server data movement
  operation can not be canceled, even after all client sessions
  that are accessing the volume have ended or have been canceled.
  .
  The following scenario is an example of the series of events
  leading up to the hang of a migration process:
  .
  1. A file volume in a GPFS file system is in the filling state,
     the file storage pool is only 60% full, and there are
     plenty of private or scratch file volumes available for
     selection.
  .
  2. The volume is selected by a storage agent as an output
     volume because it is in the filling state, and is used to
     backup client data.
  .
  3. During this time a migration process is attempting to acquire
     the volume as an input volume.
  .
  4. While migration is attempting to acquire the volume a client
     restore session preempts the migration process, and the
     storage agent opens the volume as an input volume for the
     restore operation. The client restore session does not
     maintain the volume waiter list, so when a migration process
     is acquiring the volume for input the waiter request is lost.
  .
  5. After all session request for the volume have ended or have
     been canceled the migration process continues to wait for
     the volume indefinitely because there is no notification
     that the volume has been freed up.
  .
  Initial Impact:
  Medium
  .
  Tivoli Storage Manager Versions Affected:
  Applies to all current 6.3 and 7.1 server versions.
  .
  Additional Keywords:
  Hang hung wait session process Library STA TSM GPFS LANFree
  

Local fix

• Halt and restart the Spectrum Protect server to clear the
  deadlock.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All IBM Spectrum Protect server users.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See error description.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available.                           *
  * This problem is currently projected to be fixed in levels    *
  * 7.1.8 and 8.1.1.                                             *
  * Note that this is subject to change at the discretion of     *
  * IBM.                                                         *
  ****************************************************************
  *
  

Problem conclusion

• This problem was fixed.
  Affected platforms:  AIX, HP-UX, Solaris, Linux, and Windows.
  

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 SERVER

• Fixed component ID

  5698ISMSV

Applicable component levels

• R71A PSY

     UP

• R71H PSY

     UP

• R71L PSY

     UP

• R71S PSY

     UP

• R71W PSY

     UP