IBM Support

IT34856: HIGH CPU USAGE ON WINDOWS IF A NAMED PIPE BECOMES INVALID WHILE IT IS BEING WRITTEN TO

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APAR status

  • Closed as program error.

Error description

  • The product uses Windows named pipes for inter-process
    communication. If a named pipe becomes invalid, for any reason,
    while a thread is attempting to write data to the pipe then
    that thread will get stuck in a loop. This thread will never
    exit and will consume a large amount of CPU.
    
    A service trace
    will show the thread stuck in the function ImbNamedPipe::send
    whereas a stack trace will show the same thread stuck in the
    function ImbNamedPipe::sendTimeout.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM Integration Bus v10 and IBM App Connect
    Enterprise v11 on Windows
    
    
    Platforms affected:
    Windows on x86-64 platform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    The product uses Windows named pipes for inter-process
    communication. If a named pipe becomes invalid, for any reason,
    while a thread is attempting to write data to the pipe then that
    thread will get stuck in a loop. This thread will never exit and
    will consume a large amount of CPU.
    
    A service trace will show the thread stuck in the function
    ImbNamedPipe::send whereas a stack trace will show the same
    thread stuck in the function ImbNamedPipe::sendTimeout.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT34856

  • Reported component name

    INTEGRATION BUS

  • Reported component ID

    5724J0540

  • Reported release

    A00

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-11-10

  • Closed date

    2020-12-15

  • Last modified date

    2020-12-15

  • 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

    INTEGRATION BUS

  • Fixed component ID

    5724J0540

Applicable component levels

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSNQK6","label":"IBM Integration Bus"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.0"}]

Document Information

Modified date:
16 December 2020