IT12711: DEADLOCK CONDITION DURING A MULTI-SESSION LANFREE RESTORE

7.1.5.000-TIV-TSMSRV-AIX
7.1.5.000-TIV-TSMSRV-HP-UX
7.1.5.000-TIV-TSMSRV-Linuxppc64
7.1.5.000-TIV-TSMSRV-Linuxs390x
7.1.5.000-TIV-TSMSRV-Linuxx86_64
7.1.5.000-TIV-TSMSRV-SolarisSPARC
7.1.5.000-TIV-TSMSRV-WIN
6.3.6.000-TIV-TSMALL-Linuxx86_64
6.3.6.000-TIV-TSMALL-Linuxs390x
6.3.6.000-TIV-TSMALL-AIX
6.3.6.000-TIV-TSMALL-Linuxppc64
6.3.6.000-TIV-TSMALL-HP-UX
6.3.6.000-TIV-TSMSTA-WindowsI32
6.3.6.000-TIV-TSMALL-WindowsX64
6.3.6.000-TIV-TSMALL-SolarisSPARC
6.3.6.000-TIV-TSMAC-AIX
6.3.6.000-TIV-TSMAC-Linuxs390x
6.3.6.000-TIV-TSMAC-Linuxx86
6.3.6.000-TIV-TSMAC-SolarisSPARC
6.3.6.000-TIV-TSMAC-WindowsI32
6.3.6.000-TIV-TSMAC-WindowsX64
6.3.6.000-TIV-TSMRPT-WindowsX64
6.3.6.000-TIV-TSMRPT-WindowsI32
6.3.6.000-TIV-TSMRPT-Linuxx86_64
6.3.6.000-TIV-TSMRPT-Linuxx86
6.3.6.000-TIV-TSMRPT-AGENT-Windows
6.3.6.000-TIV-TSMRPT-AIX
6.3.6.000-TIV-TSMRPT-AGENT-AIX
6.3.6.000-TIV-TSMRPT-AGENT-Linux
IBM Spectrum Protect Server V7.1 Fix Pack 5 (7.1.5.000) Downloads
IBM Tivoli Storage Manager V6.3 Fix Pack 6 (6.3.6.000) Server Downloads

APAR status

• Closed as program error.

Error description

• When performing a lanfree restore utilizing multiple sessions,
  it is possible that 2 of the sessions may attempt to
  simultaneously acquire the same input volume.  This results in a
  deadlock condition that can cause the restore operation to fail.
  When this condition occurs, the SHOW LOCKS command will show
  output similar to the following:
  
     LockDesc: Type=36002(as volume id), NameSpace=34843,
     SummMode=sLock, Key=''
       Holder: (smtb.c:7728 Thread 365164) Tsn=0:22860851,
       Mode=sLock
       Waiter: (asvolacq.c:3674 Thread 376529) Tsn=0:22860861,
       Mode=xLock
       Waiter: (asvolacq.c:1367 Thread 365164) Tsn=0:22860864,
       Mode=sLock
  
  As seen above, the deadlock condition occurs because one thread
  (365164) is attempting to acquire multiple shared locks on the
  volume id, but is unable to do so because another thread
  (376529) is attempting to acquire an exclusive lock on the same
  volume id.
  
  Tivoli Storage Manager Versions Affected:
  All server versions and platforms
  
  Initial Impact:
  Medium
  
  Additional Keywords:
  spectrum protect lan-free hang reserved streams channels
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Tivoli Storage Manager Server users of Lanfree.          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing levels when available.                          *
  * This problem is currently projected to be fixed in levels    *
  * 6.3.6 and 7.1.5                                              *
  * Note that this is subject to change at the discretion of     *
  * IBM.                                                         *
  ****************************************************************
  

Problem conclusion

• This problem was fixed.
  Affected platforms:  AIX, HP-UX, Sun 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