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IT33442: UNEXPLAINED CPU ACTIVITY AFTER AN HTTP TIMEOUT

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APAR status

  • Closed as program error.

Error description

  • If a message flow thread processing a message received through
    an HTTP Input node is terminated without sending an HTTP reply
    from the same thread, and the message being processed this way
    times out, the HTTP Input node may fail to correctly recall the
    HTTP message stored earlier for use during the timeout,
    potentially leading to unexplained CPU activity inhibiting
    shutdown and correct timeout processing.
    
    Additional Symptom(s) Search Keyword(s):
    

Local fix

  • NA
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    IBM App Connect Enterprise V11 users with http flows.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    In ACE V11,  HTTPInput node may fail to correctly recall the
    HTTP message for timeout processing, potentially leading to
    unexplained CPU activity inhibiting shutdown and correct time
    out processing.
    
    Thread stack taken at time of failure will show below calls in
    the stack:
    
    <p>ImbStringBase::assignInternal</p><p>Imb::EvHtp::request::getO
    riginalMsgAsBlob</p><p>ImbWSInputNode::MessageLoopContext::handl
    eSingleMessage</p><p>ImbWSInputNode::readQueue
    
    Note: This APAR (<span style="background-color:rgb(255, 255,
    255);color:rgb(34, 34, 34)">IT33442) </span>is a continuation of
    APAR IT32695, as  IT32695 doesn't entirely resolve the problem.
    So the customers who encounter the above issue will have to
    apply both IT32695 and IT33442 to get the issue resolved.</p>
    

Problem conclusion

  • The product no longer fails and causes a hang when http timeout
    occurs. This APAR(<span style="background-color:rgb(255, 255,
    255);color:rgb(34, 34, 34)">IT33442) together with </span><span
    style="background-color:rgb(255, 255, 255)">IT32695 </span>
    resolves the problem.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v11.0      11.0.0.10
    
    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

    IT33442

  • 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

    2020-07-06

  • Closed date

    2020-11-02

  • Last modified date

    2020-11-02

  • 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

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSDR5J","label":"IBM App Connect Enterprise"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B00"}]

Document Information

Modified date:
03 November 2020