IBM Support

PI79520: COMPUTE GRID PROXY JOB ABENDS WITH CC 4084

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Proxy job and the Compute Grid job get "out of sync", namely,
    the first job abends whereas the latter ends normally.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V8.5.5                               *
    ****************************************************************
    * PROBLEM DESCRIPTION: The Compute Grid Scheduler to           *
    *                      Endpoint HTTP dispatch function         *
    *                      attempts to retry dispatching when      *
    *                      encountering certain HTTP error codes.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The Compute Grid scheduler to endpoint HTTP dispatch function
    is designed to retry dispatch to an endpoint upon encountering
    most HTTP error codes and not on a small subset of others. In
    the case of network congestion, as denoted by HTTP error
    code -504, the original job dispatch is not guaranteed to have
    been delivered. Currently the dispatch function will attempt
    to retry the dispatch if a HTTP -504 is received from the
    original dispatch attempt. This may lead to a double dispatch
    of the job if the original dispatch was successful but
    hidden by the HTTP -504 return code.
    

Problem conclusion

  • Due to unforeseen network conditions and the related HTTP error
    codes that are raised, the Scheduler to Endpoint dispatch path
    should not retry job dispatch on a wider set of network
    congestion related HTTP error codes encountered. The Compute
    Grid Scheduler dispatch path was updated to take into account
    additional network congestion related HTTP error codes upon
    which a dispatch retry should not occur. In its place a new
    warning message, CWLRB6270W, is emitted to indicate network
    congestion is detected and that job dispatch should be
    investigated and potentially manually retried by the operator.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 8.5.5.14.  Please refer to the Recommended Updates
    page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI79520

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-04-06

  • Closed date

    2018-06-13

  • Last modified date

    2018-06-13

  • 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

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R800 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"800","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
18 October 2021