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IT26726: SEQUENTIAL STGPOOL VOLUMES SHOW READ ERRORS AFTER UPGRADING TO 8.1.6.0

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • After upgrading the Spectrum Protect server to version 8.1.6.0,
    any environment which uses sequential storage pool volumes might
    show various different read errors, which can result in extents
    or files being incorrectly marked damaged and volumes going into
    an unavailable state. VE incremental forever backups might fail
    with ANS4174E. Node replication might succeed but issue ANR1165E
    errors.
    
    
    Customer/L2 Diagnostics:
    
    Errors are seen when an attempt to read data from the volume is
    performed. Examples of these are :
    
    ANR9999D_0917394942 RtrvFramed(sstrans.c:6845) Thread<nnnn>:
    Premature end of segment group
    ANR9999D_2133050718 FileReadNC(pvrfil64.c:2169) Thread<nnnn>:
    Insufficient bytes read: expected bytes (48), actual bytes (0)
    ANR9999D_1001984741 BfEndToEndSinkFunc(bfddedup.c:1910)
    Thread<nnnn>: Magic number mismatch for&#160;self-describing data of
    chunk
    ANR1165E Error detected for file in storage pool <poolname>
    ANR1330E The server has detected possible corruption in an
    object that is being restored or moved
    ANR1331E Invalid frame detected
    ANR1308W Incorrect bytes read 48 for offset 48.
    ANR9999D_3746744715 AfReconstruct(afcreate.c:1920)
    Thread<2716114>: Unexpected result code (9976) from
    ssReconstruct.
    
    If the following error is encountered with these specific found
    length, type and size values, this APAR might apply.
    
    ANR2338E smtrans.c(7848): Invalid header received for object
    aaa, length bbb. Size (ccc), pushed (ddd), skipped (eee), status
    (fff). Found length (21317), type (46), size (4).  (SESSION:
    xxx, PROCESS: yyy)
    
    Any of the above errors might lead to data being incorrectly
    marked as damaged and volumes being made unavailable. This can
    affect deduplicated and non-deduplicated volumes, so the damage
    can be seen at an extent and/or file level.
    
    
    If a trace including the AS trace flag shows the following
    message including a very large size similar to the one seen
    here, this APAR applies.
    
    hh:mm:ss.xxx [12345][asrtrv.c][1273][AsReadSeg]:Input Segment
    size reduced by 262096 bytes, size is now 18446744073709050732
    
    There are additional specific errors which might occur during VE
    client backups or replication:
    
    This issue can affect backups from VE clients due to the
    inability to read data from a previous incremental forever
    backup :
    
    ANS0361I DIAG: VmVerifyConfirmNeededDats(): Error: Unable to
    find dat MegaBlock=nnn JobNumber=nnnn needed for restore.
    ANS9915E The guest VE_BACKUP_NODE  is missing expected data
    files from the previous backups. The backup operation continues
    based on the setting of the VMVERIFYAction option
    ANS4174E Full VM backup of VMware Virtual Machine '
    VE_BACKUP_NODE' failed with RC=4379 mode=Incremental Forever -
    Incremental, target node name=' VE_BACKUP_NODE', data mover node
    name='DATAMOVER_NODE'
    ANS1228E Sending of object ' VE_BACKUP_NODE' failed.
    ANS5226E The virtual machine backup operation failed.
    
    
    During node replication, the following might be seen.
    
    1. The ANR1165E message is logged in the server activity log.
    For example:
    ANR1165E Error detected for file in storage pool  MYPOOL : Node
    NODE1, Type Backup, File space  \\NODE1\DRIVE\ fsId 1, File name
    \DIR1\FILE1. (SESSION: 123,  PROCESS: 456)
    
    2. The replicate node process completes successfully.
    For example:
    ANR0986I Process 456 for Replicate Node running in the
    FOREGROUND processed nnn items for a total of xxx bytes with a
    completion state of SUCCESS  at HH:MM:SS. (SESSION: 123,
    PROCESS: 456)
    
    This ANR1165E error can be ignored when both conditions are met.
    
    
    In all cases, applying a fixing level for this APAR will prevent
    these errors. Contact IBM support for assistance in correcting
    the data incorrectly marked damaged and volumes erroneously set
    to unavailable status.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All IBM Spectrum Protect server users.                       *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in levels 8.1.6.100 and 8.1.7. Note    *
    * that this is subject to change at the discretion of IBM.     *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed.
    Affected platforms for reported release:  AIX, Linux, and
    Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26726

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    81L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-10-24

  • Closed date

    2019-01-03

  • Last modified date

    2019-01-03

  • 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

  • R81A PSY

       UP

  • R81L PSY

       UP

  • R81W PSY

       UP

[{"Line of Business":{"code":"LOB26","label":"Storage"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGSG7","label":"Tivoli Storage Manager"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"81L"}]

Document Information

Modified date:
28 September 2021