IC81056: SMALL TIMING WINDOW WHERE THE "QUERY SESSION " COMMAND MAY CAUSE SERVER TO CRASH

IBM Tivoli Storage Manager V5.5 Fix Pack 7 (5.5.7.000) Server Downloads

APAR status

• Closed as program error.

Error description

• There is a very small timing window  where a Tivoli Storage
  Manager Server may crash when processing a "QUERY SESSION"
  command. The crash can occur if the session's  media access
  information  is changed by another thread.
  Because of the small amount of time needed to process the media
  access information, this defect should rarely cause a server
  crash.  The more often a QUERY SESSION is performed,  the
  greater the  possibility of running into this crash.
  
  L2/Customer diagnostics:
  
  Stack of the crash:
  
  Segmentation fault in CopyMediaWaitList at 0x100947bbc
  ($t9725421)
  0x100947bbc (CopyMediaWaitList+0x1dc) 88030000         lbz
  r0,0x0(r3)
  (dbx) where
  CopyMediaWaitList(??, ??) at 0x100947bbc
  smQuerySession(??) at 0x100947374
  AdmCommandLocal(??, ??, ??, ??, ??) at 0x10017f2f0
  admCommand(??, ??, ??, ??, ??) at 0x10017d8b0
  SmAdminCommandThread(??) at 0x100872690
  StartThread(??) at 0x10001b6e4
  
  Version Platform Affected:
  Tivoli Storage Manager Server V5.1 and above on all supported
  platforms
  
  Additional keywords:
  CopyMediaWaitList  smQuerySession
  

Local fix

• Reduce the frequency of "query session" command may prevent this
  crash
  

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 5.5.7, 6.2.5, and 6.3.2.           *
  *                 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, z/OS, 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:

  PM83052

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

• R63A PSY

     UP

• R63H PSY

     UP

• R63L PSY

     UP

• R63S PSY

     UP

• R63W PSY

     UP