IBM Support

IT32695: 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:
    <span style="font-family:courier new,courier,monospace"><span
    style="font-size:14px">IBM App Connect Enterprise V11 users with
    http flows.  </span></span>
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    <span style="font-size:14px"><span style="font-family:courier
    new,courier,monospace"><span style="background-color:rgb(255,
    255, 255);color:rgb(0, 0, 0)">If a message flow thread
    processing a message received through </span><span
    style="background-color:rgb(255, 255, 255);color:rgb(0, 0,
    0)">an HTTP Input node is terminated without sending an HTTP
    reply </span><span style="background-color:rgb(255, 255,
    255);color:rgb(0, 0, 0)">from the same thread, and the message
    being processed this way </span><span
    style="background-color:rgb(255, 255, 255);color:rgb(0, 0,
    0)">times out, the HTTP Input node may fail to correctly recall
    the </span><span style="background-color:rgb(255, 255,
    255);color:rgb(0, 0, 0)">HTTP message stored earlier for use
    during the timeout, </span><span
    style="background-color:rgb(255, 255, 255);color:rgb(0, 0,
    0)">potentially leading to unexplained CPU activity inhibiting
    </span><span style="background-color:rgb(255, 255,
    255);color:rgb(0, 0, 0)">shutdown and correct timeout
    processing.
    
    Thread stack taken at the time of failure will show below calls
    in the stack:</span></span></span>
     <p style="margin-left:0px">ImbStringBase::assignInternal</p><p
    style="margin-left:0px">Imb::EvHtp::request::getOriginalMsgAsBlo
    b
    ImbWSInputNode::MessageLoopContext::handleSingleMessage</p><p
    style="margin-left:0px">ImbWSInputNode::readQueue</p>
    

Problem conclusion

  • <span style="font-size:14px"><span style="font-family:courier
    new,courier,monospace"><span style="background-color:rgb(248,
    248, 248);color:rgb(29, 28, 29)">The product no longer fails and
    cause a hang when http timeout occurres</span></span></span>
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v11.0      11.0.0.9
    
    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

    IT32695

  • 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

    2020-04-29

  • Closed date

    2020-06-03

  • Last modified date

    2020-06-03

  • 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

  • RB00 PSY

       UP

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

Document Information

Modified date:
12 June 2020