IC68888: THREAD CONCURRENCY PROBLEMS RELATED TO USING NAS DEVICES MAY CAUSE A CRASH

APAR status

• Closed as program error.

Error description

• During a short window of time when a NAS device is being
  initialized,
  a memory buffer can become corrupted leading to a crash.
  -
  This is more likely to occur if there are connection
  problems with the NAS devices because the window of time for
  initializing the NAS device may be significantly increased.
  -
  This issue will only be present when a server configuration has
  more than one path to a library device originating from a NAS
  datamover.
  -
  Tivoli Storage Manager Versions Affected:
  All TSM releases and platforms
  Customer/L2 Diagnostics:
  Analysis of a core file generated by the crash may contain
  a stack similar to the following:
  TsmRemoteOpen (param=0x33ed10b1c8, dev_info={devtype = 8 '\b',
  scsi_id = 131 '~', lun_id = 13 '\017', identifier = '\0'
  <repeats 31 times>}, handle=0x4221ceac,
  remoteExecuteCdb=0x33ecae0890 <spiRemoteIoctl>) at
  remote_open.c:271
  PvrRemoteOpenAuto ()
  PvrOpenAutoDevice ()
  OpenAutoDevice ()
  MmsAcquireAuto ()
  TestDriveFull ()
  ScsiSetLibDevice ()
  PerformInit ()
  InitThread ()
  StartThread ()
  start_thread ()
  Additionally, attempts to start the Tivoli Storage Manager
  Server may result in in a segmentation fault
  similar to the following:
  ANR7800I DSMSERV generated at 11:43:05 on Apr 25 2010.
  ANR7801I Subsystem process ID is 22341.
  ANR0900I Processing options file dsmserv.opt.
  ANR4726I The ICC support module has been loaded.
  ANR0990I Server restart-recovery in progress.
  ...  <truncated> ...
  ANR1305I Disk volume /tsm/vol1.dsm varied online.
  ANR1305I Disk volume /tsm/vol2.dsm varied online.
  ANR8844E Unable to open remote drive VTL_DRV01 (rst01a), error
  code=2.
  Segmentation fault (core dumped)
  Initial Impact:
  Low
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Tivoli Storage Manager server users      *
  *                 with NAS devices                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: See error description.                  *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 5.5.5, 6.1.5, and 6.2.2.           *
  *                 Note that this is subject to change at       *
  *                 the discretion of IBM                        *
  *                                                              *
  *                 Affected Platforms: AIX, HP/UX, Linux,       *
  *                 Solaris, Windows.                            *
  ****************************************************************
  *
  

Problem conclusion

• This problem was fixed.
  

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