IBM Support

IT15829: NETAPP NDMP CLUSTER BACKUP LOCKS TAPE LIBRARY OPERATIONS UNTIL COMPLETE.

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APAR status

  • Closed as program error.

Error description

  • Netapp NDMP Cluster backup creates a lock that prevents all
    other tape library operations from completing until the NDMP
    cluster backup completes and releases the lock.
    
    For example, If the library manager needs to satisfy a volume
    mount request for a server database backup, or a library client
    requires a volume mounted, these operations will wait until the
    NDMP cluster backup completes.
    
    In addition, server queries such as QUERY MOUNT, QUERY DEVCLASS,
    and QUERY PATH, will appear to be hung until the NDMP backup
    completes and releases the lock.
    
    The problem can be verified by running the SHOW LOCKS command
    that will show the holder of the sLock is the thread for a
    BACKUP NODE process:
    
    TSMINST1> SHOW LOCKS
    Lock hash table contents (slots=3002):
    Note: Enabling trace class TMTIMER will provide additional
    timing info on the following locks
    slot -> 468:
    LockDesc: Type=34000(ss universe), NameSpace=0, SummMode=sLock,
      Key=''
      Holder: (ssvolqry.c:263 Thread 99378) Tsn=0:501304, Mode=sLock
    slot -> 2976:
    LockDesc: Type=88000(na universe), NameSpace=0, SummMode=sLock,
      Key=''
      Holder: (nautil.c:206 Thread 99015) Tsn=0:499364, Mode=sLock
      Waiter: (nautil.c:206 Thread 99105) Tsn=0:500098, Mode=sixLock
      Waiter: (nautil.c:206 Thread 99016) Tsn=0:500154, Mode=sLock
      Waiter: (nautil.c:206 Thread 99350) Tsn=0:501204, Mode=sLock
    In this example the SHOW THREADS command is used to look up and
    verify that thread 99015 is a BACKUP NODE operation holding the
    sLock:
    Thread 99015, Parent 99013: AfStoreRemoteThread, Storage 308209,
     AllocCnt 1086588 HighWaterAmt 557604 tid=140101713319680,
     ptid=140101712267008, det=1, zomb=0, join=0, result=0, sess=0,
     procToken=18, sessToken=7498 lwp=21087
      Awaiting cond agentP->doneCond (0x0x1feef00), using mutex
      agentP->mutex (0x0x2577b68), at pvr.c(13037)
     Thread context:
       COMMMETHOD: Tcp/Ip
       COMMAND: BACKUP NODE
       THREAD_TYPE: PROCESS
       PROCESS_DESC: BACKUP NAS (FULL)
       SESSION_TYPE: ADMIN
    .
    Initial Impact:
    High
    .
    Tivoli Storage Manager Versions Affected:
    Applies to spectrum protect version 7.1.4, and higher.
    Additional Keywords:
    Hung Hang Netapp NAS NDMP Cluster backup lock.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users of NDMP backup of    *
    * Netapp filers running in clustered mode.                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in levels 7.1.7.  Note that this is    *
    * subject to change at the discretion of IBM.                  *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed.
    Affected platforms:  AIX, Solaris, Linux, and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT15829

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-06-23

  • Closed date

    2016-08-19

  • Last modified date

    2016-08-19

  • 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

  • R71A PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP

  • R71W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT15829

Modified date: 19 August 2016