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PI50389: CONVERTTOJSONPRIMITIVE DATA TRANSFORMATION PART OF Z/OS CONNECT USES HIGH CPU

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APAR status

  • Closed as program error.

Error description

  • z/OS Connect consumes excessive CPU amounts.  It was found
    that
    the method convertToJSONPrimitive is very expensive.  In
    this
    testcase it accounts for nearly a third of the cumulative
    samples.  This APAR is to optimize this method so it uses
    less
    CPU.
    

Local fix

  • NA
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty Profile for z/OS using z/OS  *
    *                  Connect's data transformation support.      *
    ****************************************************************
    * PROBLEM DESCRIPTION: High CPU caused by                      *
    *                      convertToJSONPrimitive when using z/OS  *
    *                      Connect's data transformer.             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    High CPU usage is observed when processing a high volume of
    requests through z/OS Connect and when using z/OS Connect's data
    transformer. More specifically, the problem takes place because
    inefficient processing under convertToJSONPrimitive method,
    which is part of the data transformation tooling that z/OS uses.
    The tooling used to analyze the high CPU highlights the
    mentioned method as a potential cause.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI50389

  • Reported component name

    LIBERTY PROF -

  • Reported component ID

    5655W6514

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-10-12

  • Closed date

    2015-10-29

  • Last modified date

    2015-10-29

  • 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

    LIBERTY PROF -

  • Fixed component ID

    5655W6514

Applicable component levels

  • R850 PSY

       UP

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Document Information

Modified date:
29 October 2015