IT15865: DSMC CAN CRASH USING "MEMORYEFFICIENTBACKUP DISKCACHEMETHOD" OPTION FOR A BACKUP OF A SPACE MANAGED FILESYSTEM

IBM Spectrum Protectâ„¢ Client 8.1.0 Downloads and READMEs
IBM Spectrum Protect client 7.1.6.x interim fix downloads

APAR status

• Closed as fixed if next.

Error description

• When performing a backup of a Space Managed (HSM) filesystem on
  AIX/Linux/Solaris platform, where the option
  "memoryefficientbackup diskcachemethod" is in use, a memory leak
  can occur, such that the dsmc binary
  can fail with a core dump.
  
  The backup will fail after some time like in this example
  output:
  
  ANS1898I ***** Processed   141,000 files *****
  ANS1898I ***** Processed   141,500 files *****
  ANS1898I ***** Processed   146,000 files *****
  
  Fatal error: got signal 11
  IOT/Abort trap(coredump)
  
  
  Running the dbx debugger on AIX reports:
  
  
  pthread_kill(??, ??) at 0x90000000052ff94
  _p_raise(??) at 0x90000000052f7e4
  raise.raise(??) at 0x900000000039468
  abort() at 0x900000000055ae4
  psunxthr.psAbort()() at 0x100062ee0
  psunxthr.psTrapHandler(int,int,__sigcontext*)() at 0x100062e30
  backmigr.doBackMigr(txnProducerObject_t*,backupSpec*,int,char*)(
  ) at 0x1004bc2b4
  incrdrv.baIncremental(backupPrivObject_t*,backupSpec*)() at
  0x10053ab7c
  incrdrv.baProcessRequest(backupPrivObject_t*,backupSpec*)() at
  0x1005457f4
  incrdrv.baRequestHandler(backupPrivObject_t*,backupSpec*)() at
  0x100542600
  bacontrl.DccTxnProducer::HandleQueue()() at 0x100568e30
  bacontrl.DccTxnProducer::Run(void*)() at 0x100568614
  bacontrl.DccTxnProducer::DoThread(void*)() at 0x10056936c
  bacontrl.callDoPThread2(void*)() at 0x10056084c
  thrdmgr.startThread2(Threadstart*)() at 0x1003367f4
  thrdmgr.startThread(Threadstart*)() at 0x1003366ec
  
  
  
  
  
  
  
  
  Tivoli Storage Manager Versions Affected:
  Tivoli Storage Manager Client: 6.3.x, 6.4.x and 7.1.x on UNIX
  platforms that support the Tivoli Storage Manager for Space
  Management client.
  
  
  
  Initial Impact: Medium
  
  
  Additional Keywords: TSM IBM Spectrum Protect crash core HSM
  backup memory leak
  

Local fix

• Use "MEMORYEFFICIENTBACKUP yes"
  or the default setting (i.e. "MEMORYEFFICIENTBACKUP no").
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Tivoli Storage Manager backup-archive client version 7.1     *
  * running on AIX and Linux platforms backing up or achiving    *
  * HSM managed file systems.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

Temporary fix

Comments

• If there is a next release of  Tivoli Storage Manager after 7.1,
  this APAR will be fixed in that next release.
  

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

Applicable component levels

• R71A PSN

     UP

• R71L PSN

     UP