IBM Support

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

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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 number

    IT15865

  • Reported component name

    TSM CLIENT

  • Reported component ID

    5698ISMCL

  • Reported release

    71A

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-06-25

  • Closed date

    2016-07-22

  • Last modified date

    2016-07-22

  • 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

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGSG7","label":"Tivoli Storage Manager"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"71A","Line of Business":{"code":"LOB26","label":"Storage"}}]

Document Information

Modified date:
07 January 2022