IBM Support

IT42297: NODE-WIDE HTTPLISTENER EXHIBITS HIGH CPU AND PERFORMANCE DEGRADATION UNDER HEAVY LOAD

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APAR status

  • Closed as program error.

Error description

  • Under heavy load, it has been observed that the node-wide
    listener ( biphttplistener ) consumes very high CPU and
    performance degrades which affect throughput rate. This issue is
    more pronounced as the Request header size increases.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of App Connect Enterprise v11.0 and v12.0 using
    integration node listener.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    The integration node listener ( biphttplistener  process)
    exhibits very high CPU usage when put through a heavy load. This
    further affects the throughput rate.  This issue is more
    pronounced with larger size of  Request headers.
    

Problem conclusion

  • The performance issue and the high cpu on biphttplistener was
    caused due to the construction of logging buffer even when
    diagnostic traces were not enabled. The biphttplistener
    component has now been modified such that it no longer creates
    logging buffer when traces are not enabled thus improving the
    performance.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v11.0      11.0.0.20
    v12.0      12.0.7.0
    
    The latest available maintenance can be obtained from:
    http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
    
    If the maintenance level is not yet available,information on
    its planned availability can be found on:
    http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT42297

  • Reported component name

    APP CONNECT ENT

  • Reported component ID

    5724J0550

  • Reported release

    B00

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2022-10-20

  • Closed date

    2023-01-24

  • Last modified date

    2023-01-24

  • 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

    APP CONNECT ENT

  • Fixed component ID

    5724J0550

Applicable component levels

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDR5J","label":"IBM App Connect Enterprise"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B00","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
25 January 2023