IC70059: DEADLOCK CONDITION MAY OCCUR DURING TAPE MOUNT ON LIBRARY MANAGER

IBM Tivoli Storage Manager V5.5 Fix Pack 6 (5.5.6) Server Downloads

APAR status

• Closed as program error.

Error description

• A tape mount request from a library client may fail as a result
  of a deadlock condition on the library manager.  Errors similar
  to the following will be seen in the library manager's activity
  log:
  
     ANR0379W A server database deadlock situation has been
     encountered; the lock request for the mms universe lock, will
     be denied to resolve the deadlock.
     ANR9790W Request to mount volume *SCRATCH* for library client
     LIBCLIENT failed.
  
  The problem is most likely to occur when there are active LABEL
  LIBVOLUME, RELABEL and/or CHECKIN LIBVOLUME processes running on
  the library manager at the time the tape mount is requested.
  
  Platforms affected:
  All TSM Servers
  
  Customer/L2 Diagnostics:
  A trace (DEADLOCK flag) on the library manager will show that
  the deadlock condition occurs when one transaction is holding
  the 'mms universe' lock (lock type 23000), while trying to
  acquire the 'ic lock voltype' lock (lock type 77778).  The other
  transaction is holding the 'ic lock voltype' lock and trying to
  acquire the 'mms universe' lock, as seen below:
  
     A Deadlock was found:
     Transaction 0:121244072.
       Waiting for Lock mode sLock on: Type=77778(unknown),
       NameSpace=19, Key=''
       Held by transaction 0:121244067 in mode xLock.
     Transaction 0:121244067.
       Waiting for Lock mode xLock on: Type=23000(mms universe),
       NameSpace=0, Key=''
       Held by transaction 0:121244072 in mode xLock.
  
  Additional Keywords:
  mms_universe ic_lock_voltype
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Tivoli Storage Manager server users.     *
  ****************************************************************
  * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 5.5.6, 6.1.5, and 6.2.2.           *
  *                 Note that this is subject to change at the   *
  *                 discretion of IBM.                           *
  ****************************************************************
  See ERROR DESCRIPTION.
  Affected Platforms: AIX, HP-UX, Sun Solaris, Linux, and Windows.
  

Problem conclusion

• The described problem has been resolved.
  

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

• R55A PSY

     UP

• R55H PSY

     UP

• R55L PSY

     UP

• R55S PSY

     UP

• R55W PSY

     UP

• R61A PSY

     UP

• R61H PSY

     UP

• R61L PSY

     UP

• R61S PSY

     UP

• R61W PSY

     UP

• R62A PSY

     UP

• R62H PSY

     UP

• R62L PSY

     UP

• R62S PSY

     UP

• R62W PSY

     UP