IC67615: UPDATE DRIVE COMMANDS DURING DRIVE POLLING CAN CAUSE PARTIAL SER VER HANG

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The Tivoli Storage Manager server can partially hang because of
    a deadlock issue if multiple UPDATE DRIVE commands are issued
    while drive polling is taking place.
    .
    The first symptoms will be that various administrative commands
    such as QUERY VOLUME and QUERY MOUNT will not return data.
    Client backups may also stop.  Eventually, the server can
    completely hang.
    .
    Customer/L2 Diagnostics:
    Collect several iterations of "SHOW THREADS" over a period
    of time.  Search for a SmAdminCommandThread thread that includes
    the "mmsCmdUpdateDrive" function.  If this same thread remains
    in a "_cond_wait_global" wait condition during subsequent "SHOW
    THREADS" iterations (over 30 minutes or longer), this problem
    likely applies.  For example;
    .
    Thread 12345, Parent 54321: SmAdminCommandThread, Storage 22494,
    AllocCnt 23 HighWaterAmt 38617
     tid=19ac9, ptid=194bc, det=0, zomb=0, join=1, result=0, sess=0
      Awaiting cond driveP->AckTerminatePoll (0x110947840),
      using mutex MMSV->mutex (0x111189138), at mmsdrive.c(4253)
      Stack trace:
        0x0900000000710d50 _cond_wait_global
        0x09000000007118dc _cond_wait
        0x09000000007125cc pthread_cond_wait
        0x00000001000076c4 pkWaitConditionTracked
        0x0000000100037a34 MmsUpdateDrive
        0x0000000100a54288 mmsCmdUpdateDrive
        0x0000000100ac6ef8 psCommand
        0x000000010016ea04 AdmCommandLocal
        0x000000010016d198 admCommand
        0x0000000100753e74 SmAdminCommandThread
        0x0000000100009504 StartThread
    .
    Initial Impact:
    High
    .
    Tivoli Storage Manager Versions Affected:
    All supported Tivoli Storage Manager servers.
    .
    Additional Keywords:
    TSM DSMSERV HANG HUNG PARTIAL COMMAND UPDATE DRIVE ZZ61
    FAILURE MUTEX MMSV->MUTEX PKWAITCONDITIONTRACKED
    .
    

Local fix

  • Restart the server to clear the deadlock.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All Tivoli Storage Manager servers using     *
    *                 tape drives.                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
    ****************************************************************
    * RECOMMENDATION: Apply fixing level when available. This      *
    *                 problem is currently projected to be fixed   *
    *                 in level 5.4.7, 5.5.5, 6.1.4, and 6.2.1.     *
    *                 Note that this is subject to change at the   *
    *                 discretion of IBM.                           *
    ****************************************************************
    *
    

Problem conclusion

  • This problem was fixed.
    Affected platforms:  AIX, Sun Solaris, Linux, HP-UX, and
    Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC67615

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    61A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-04-02

  • Closed date

    2010-04-19

  • Last modified date

    2010-04-19

  • 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

  • R54A PSY

       UP

  • R54H PSY

       UP

  • R54L PSY

       UP

  • R54S PSY

       UP

  • R54W PSY

       UP

  • 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



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Document information


More support for:

Tivoli Storage Manager

Software version:

61A

Reference #:

IC67615

Modified date:

2010-04-19

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