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IT21045: DSMAGENT CRASHES WHEN PERFORMING VSS BACKUP AGAINST A HIGH NUMBER OF MICROSOFT SQL DATABASE

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The dsmagent.exe process may crash when performing a high number
    (more than 254) of Microsoft SQL backups (vss method) via IBM
    Spectrum Protect for Databases ? Data Protection for Microsoft
    SQL Server.
    
    The following errors are reported in dsmerror.log:
    
    ANS5250E An unexpected error was encountered.
       TSM function name : vssCreateLocalBackup
       TSM function      : No memory to allocate snapVolEntry_t
    structure
       TSM return code   : 102
       TSM file          : ..\..\common\winnt\vssback.cpp (6609)
     ANS5250E An unexpected error was encountered.
       TSM function name : baCreateLocalBackup
       TSM function      : VSS Create Local Backup Failed
       TSM return code   : 102
       TSM file          : ..\..\common\ba\backsnap.cpp (2452)
    
    Nothing is reported in tdpsql.log
    
    
    
    Customer/L2 Diagnostics:
    The dump analysis of the dsmagent shows:
    STACK_TEXT:
    dsmagent!llGetItemAt+0x50
    dsmagent!VssRequestor::getRequest+0xf0
    dsmagent!VssRequestor::abortCSVBackup+0x113
    dsmagent!VssRequestor::VssBackupComplete+0x138
    dsmagent!VssRequestor::abortBackup+0x4d
    dsmagent!vssAbortBackup+0x253
    dsmagent!tlPostProcessTxnSpec+0x912
    dsmagent!DccTxnConsumer::HandleRcPrivFlush+0x494
    dsmagent!DccTxnConsumer::HandleQueue+0x71c
    dsmagent!DccTxnConsumer::Run+0x6a2
    dsmagent!DccTxnConsumer::DoThread+0xc4
    
    The issue does not occur if performing a legacy backup
    
    IBM Spectrum Protect Versions Affected: IBM Spectrum Protect
    backup-archive client v7.1 and v8.1 on Windows platforms
    
    Initial Impact: medium
    
    Additional Keywords: ANS5250E dsmagent baCreateLocalBackup
    vssCreateLocalBackup vss crash sql backup tdpsqlc tsm IBM
    Spectrum
    

Local fix

  • Backup the Microsoft SQL DB  with IBM Spectrum Protect for
    Databases ? Data Protection for Microsoft SQL Server in groups
    of 254 DBs (or less) or use the legacy method backup
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Backup-archive client versions 7.1 and 8.1 running on all    *
    * Microsoft Windows platforms.                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See ERROR DESCRIPTION                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * This issue is projected to be fixed in the Backup-Archive    *
    * Client version 7.1.8 and 8.1.4 on all Microsoft Windows      *
    * platforms                                                    *
    * Note that this is subject to change at the discretion of     *
    * IBM.                                                         *
    ****************************************************************
    

Problem conclusion

  • The problem when attempt to back up more then 255 MS SQL
    databases did lead to the crash and the hang has been fixed so
    that it no longer occurs.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT21045

  • Reported component name

    TSM CLIENT

  • Reported component ID

    5698ISMCL

  • Reported release

    71W

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-06-15

  • Closed date

    2017-08-02

  • Last modified date

    2017-08-02

  • 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

  • Fixed component name

    TSM CLIENT

  • Fixed component ID

    5698ISMCL

Applicable component levels

  • R71W PSY

       UP

  • R81W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 71W

Reference #: IT21045

Modified date: 02 August 2017