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IC99145: REPLICATION "END TIME" STATISTIC INCORRECTLY UPDATED BY A CONCURRENT REPLICATION PROCESS

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APAR status

  • Closed as program error.

Error description

  • The command QUERY REPLICATION may report an incorrect "End Time"
    for an already ended replication process if the following
    conditions are met :
     - Two or more replication processes are started at the exact
       same time, i.e. in the same second.
     - One replication process ends before the other.
    
    A QUERY REPLICATION done when the first process has finished,
    shows the correct "End Time" value for this process.
    Later when the other process(es) finishes, the "End Time" value
    for all the processes that have the same "Start Time" are
    updated using the last process "End Time" value.
    
    
    Tivoli Storage Manager Versions Affected:  All platforms  6.3
    
    Customer/L2 Diagnostics :
    
     - Two processes are started  from a script in the same second:
    
     2014-01-22 11:00:22  ANR0984I Process 1914 for Replicate
      Node started in the FOREGROUND at 11:00:22. (SESSION:
      926929, PROCESS: 1914)
     2014-01-22 11:00:22      ANR0984I Process 1915 for Replicate
      Node started in the FOREGROUND at 11:00:22. (SESSION:
      926930, PROCESS: 1915)
    
      - One process ends at 11:10:14
    
     2014-01-22 11:10:14      ANR0986I Process 1914 for Replicate
      Node running in the FOREGROUND processed 2,593,354 items
      for a total of 13,131,799,040 bytes with a completion
      state of SUCCESS at 11:10:14. (SESSION: 926929, PROCESS: 1914)
    
      - A "Q REPLICATION"  done here shows the correct "End Time"  :
    
    Node  Filespace FSID Start Time  End Time    Status Process
    Name  Name                                          Number
    
    ----  ---------- --- ----------  ----------  ------ -------
    NODEX /test      1   01/22/2014  01/22/2014  Ended   1,914
                         11:00:22    11:10:14
    
      - The second process ends at 11:50:02 :
    
     2014-01-22 11:50:02      ANR0986I Process 1915 for Replicate
      Node running in the FOREGROUND processed 5,363,417 items
      for a total of 477,803,835,392 bytes with a completion state
      of SUCCESS at 11:50:02. (SESSION: 926930, PROCESS: 1915)
    
     - A "Q REPLICATION" shows now that the  "End Time" for the
    previous process has been updated incorrectly to the "End Time"
    of the second process:
    
    
    Node  Filespace FSID Start Time  End Time    Status Process
    Name  Name                                          Number
    
    ----  ---------- --- ----------  ----------  ------ -------
    NODEX /test      1   01/22/2014  01/22/2014  Ended   1,914
                         11:00:22    11:50:02
    NODEY /testy     3   01/22/2014  01/22/2014  Ended   1,915
                         11:00:22    11:50:02
    
    Initial Impact: Low
    
    Additional Keywords:
    TSM REPL endtime statistics zz63
    

Local fix

  • - Do not use a script to start concurrent replication processes
    to avoid having them started with exact the same "Start Time"
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users that perform Node    *
    * Replication.                                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in level 7.1.1.0. Note that this is    *
    * subject to change at the discretion of IBM.                  *
    ****************************************************************
    

Problem conclusion

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

Temporary fix

Comments

APAR Information

  • APAR number

    IC99145

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    63A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-02-04

  • Closed date

    2014-05-06

  • Last modified date

    2014-05-06

  • 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

  • R63A PSY

       UP

  • R63W PSY

       UP

  • R63H PSY

       UP

  • R63L PSY

       UP

  • R63S PSY

       UP

  • R71A PSY

       UP

  • R71W PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 63A

Reference #: IC99145

Modified date: 06 May 2014