IBM Support

PH19392: WHEN CHECKPOINTING IS TURNED ON IT INCREASES THE NODE SYNCHRONIZATION TIMES

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APAR status

  • Closed as program error.

Error description

  • When Checkpointing is turned ON it increases the Node
    synchronization times.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server version 8.5.5 or later               *
    ****************************************************************
    * PROBLEM DESCRIPTION: When Checkpointing is turned ON in a    *
    *                      Network Deployment environment,         *
    *                      it increases the node synchronization   *
    *                      time.                                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In the current scenario, when the checkpointing is ON in a
    Network Deployment(ND) environment, in addition to checkpoints
    being generated on the Deployment Manager they are
    also generated on the Nodes during node synchronization.
    And, when dealing with larger applications and
    greater checkpoint depths there is a significant delay in
    the node synchronization.
    

Problem conclusion

  • This fix provides an option through a custom property to
    avoid
    checkpoint generation on the Nodes when Checkpointing is
    turned ON the Deployment Manager.
    So, when the Checkpointing is ON and the custom property
    com.ibm.ws.checkpoint.bypass is set to TRUE on the
    Deplyoment Manager and all the Nodeagents then checkpoints
    will be generated on the Deployment Manager only and not on
    the Nodes during node sync.
    
    The fix for this APAR is targeted for inclusion in fix pack
    8.5.5.18 and 9.0.5.4.
    
    For more information, see
    'Recommended Updates for WebSphere Application Server':
    http://www.ibm.com/support/docview.wss?
    rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH19392

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-11-19

  • Closed date

    2020-02-12

  • Last modified date

    2020-02-12

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850"}]

Document Information

Modified date:
14 September 2020