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IT14919: RETRIEVAL OPERATIONS FROM A CONTAINER STORAGE POOL MAY ERRONEOUSLY FAIL DUE TO ANR2818E ERROR

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • A timing problem exists where an attempt to retrieve data from a
    container storage pool may fail if the retrieval operation is
    performed shortly after the data has been backed up, archived,
    replicated or protected.  Affected retrieval operations include
    PROTECT STGPOOL, REPLICATE NODE, AUDIT CONTAINER, and client
    retrievals.  The failure occurs because the retrieval operation
    attempts to access data that has not yet been flushed to media.
    The following error is generated in the activity log when this
    condition occurs:
    
       ANR2818E A consistency check failed on container
       /tsm/container/10/0000000000009999.dcf with error 4800.
    
    (Note: error 4800 can also be error 4801, error 4802 or error
    4803)
    
    Corresponding chunk header errors are also recorded in the
    dsmffdc.log file:
    
       [ FFDC GENERAL_SERVER_ERROR ]: (sdutil.c:4462) Chunk Header
       Invalid Signature chunkId: 5702387903525131283 Container:
       /tsm/container/10/0000000000009999.dcf Offset: 36929536
    
    After the ANR2818E error has occurred, a subsequent PROTECT
    STGPOOL operation will identify one or more damaged extents on
    the affected container:
    
       ANR4847W PROTECT STGPOOL detected an extent with ID
       5702387903525131283 on container
       /tsm/container/10/0000000000009999.dcf that is marked damaged
    
    Because the initial ANR2818E error occurred as the result of a
    timing problem, performing an audit of the affected container
    after the data has been successfully flushed to media will
    result in the extent(s) previously marked as damaged becoming
    undamaged:
    
       ANR2017I Administrator ADMIN issued command: AUDIT CONTAINER
       /tsm/container/10/0000000000009999.dcf
       ANR4886I Audit Container (Scan) process started for container
       /tsm/container/10/0000000000009999.dcf (process ID 165).
       ANR4891I AUDIT CONTAINER process 165 ended for the
       /tsm/container/10/0000000000009999.dcf container: 1728 data
       extents inspected, 0 data extents marked as damaged, 1 data
       extents previously marked as damaged reset to undamaged, 0
       data extents marked as orphaned, and 0 data extents
       previously marked as orphaned reset to unorphaned.
    
    In the event of a server crash prior to the data being
    successfully flushed to media, then the above ANR2818E error
    message may not be seen, but damaged extents may be detected on
    one or more containers in the storage pool. In this situation,
    the affected extents are damaged and cannot be resolved via the
    AUDIT CONTAINER process.
    
    Versions Affected:
    IBM Spectrum Protect server versions 7.1.3 and higher
    
    Initial Impact:
    Medium
    
    Additional Keywords:
    directory container chunk header extent flush timing
    

Local fix

  • If the ANR2818E error is seen, quiesce all backup, archive,
    replication, and protect operations to the storage pool, wait
    for all of these sessions to end, and then perform an AUDIT
    CONTAINER on the affected container(s).
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users of container storage *
    * pools.                                                       *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is projected *
    * to be fixed in level 7.1.5.200 and 7.1.6. Note that this is  *
    * subject to change at the discretion of IBM.                  *
    ****************************************************************
    

Problem conclusion

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

Temporary fix

Comments

APAR Information

  • APAR number

    IT14919

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-04-22

  • Closed date

    2016-04-25

  • Last modified date

    2016-06-13

  • 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

  • R71L PSY

       UP

  • R71W PSY

       UP

  • R71S PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT14919

Modified date: 13 June 2016