IT01961: DSMC MAY CRASH DURING HUGE BACKUPS WITH CLIENT SIDE DEDUPLICATION ENABLED

IBM Tivoli Storage Manager (TSM) Client 7.1.1 Downloads and READMEs
IBM Tivoli Storage Manager Client 6.4.3 Downloads and READMEs
IBM Tivoli Storage Manager (TSM) client 6.3.2.x interim fix downloads - EOL

APAR status

• Closed as program error.

Error description

• If client side deduplication is enabled and a file failed to be
  sent to the server during backup,
  the Tivoli Storage Manager client can crash while he tries
  resending the file.
  
  For example  if a file is changing during  a scheduled backup,
   the following messages will be seen:
  ANS1228E Sending of object 'FILENAME' failed.
  ANS4037E Object 'FILENAME' changed during processing.  Object
  skipped.
  ANS1512E Scheduled event 'SCHEDULENAME' failed.  Return code =
  12.
  
  A core dump is generated (when the file will by tried to resend)
  and the stack on Linux looks like is:
  pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  psWaitCondition(pthread_cond_t*, pthread_mutex_t*) ()
  pkWaitCb(conditionBundle*) ()
  fifoObject::fifoQgetNextWaitNoTS(int) ()
  fifoObject::fifoQgetNextWait(int) ()
  DedupMT::GetNext(fifoObject*, void**) ()
  DedupMT::GetNextInQueueObj(QueueObj**) ()
  DedupMT::dedupThread() ()
  callDedupThread(void*) ()
  start_thread () from /lib64/libpthread.so.0
  clone () from /lib64/libc.so.6
  
  
  
  
  Customer/L2 Diagnostics:
  It has been verified that this is a timing problem since the
  TivolI Storage Manager Client is not capable to manage correctly
  the situation described before.
  Here is the set of conditions that may lead to this issue (all
  must be true):
  1. Client deduplication needs to be enabled during backup.
  2. The system needs to be rather fast.
  3. At least one of the files needs to be retried during
  processing (this affects changing files, files being in use and
  so on).
  4. An high value for RESOURCEUTILIZATION option
  
  
  
  Tivoli Storage Manager Versions Affected: All Tivoli Storage
  Manager  Client  v6.x and 7.1 on all Platforms.
  
  
  Initial Impact: Medium
  
  Additional Keywords: TSM dsmc crash ANS0361I timer deduplication
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Backup-archive client versions               *
  *                 6.2.2 - 6.2.5, 6.3.x, 6.4.x and 7.1.0        *
  *                 running on all platforms.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: See ERROR DESCRIPTION                   *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 6.3.2.4, 6.4.3 and 7.1.1. Note     *
  *                 that this is subject to change at the        *
  *                 discretion of IBM.                           *
  ****************************************************************
  *
  

Problem conclusion

• The problem has been fixed so it no longer occurs
  

Temporary fix

• 6.3.2.4 interim fix for AIX, Linux x86, Mac, and Windows clients
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• DSMC
  

Fix information

• Fixed component name

  TSM CLIENT

• Fixed component ID

  5698ISMCL

Applicable component levels

• R63A PSY

     UP

• R63H PSY

     UP

• R63L PSY

     UP

• R63M PSY

     UP

• R63S PSY

     UP

• R63W PSY

     UP

• R64A PSY

     UP

• R64H PSY

     UP

• R64L PSY

     UP

• R64M PSY

     UP

• R64S PSY

     UP

• R64W PSY

     UP

• R71A PSY

     UP

• R71H PSY

     UP

• R71L PSY

     UP

• R71M PSY

     UP

• R71S PSY

     UP

• R71W PSY

     UP