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IV50132: TCP REQUEST/RESPONSE STYLE COMMUNICATION MAY HANG AFTER ACK PKT.

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You can track all active APARs for this component.

APAR status

  • Closed as fixed if next.

Error description

  • A tcp request/response style communication exchange may
    hang after a pure ACK packet is received and the
    application
    is about to send a new packet.
    
    An iptrace will show this type of pattern right before
    the
    exchange stops:
    request host1>host2
    response host2>host1
    ACK  host1>host2
    --- no further communications for this socket ---
    

Local fix

  • This is a rare condition exposed by efix for defect
    882715.
    

Problem summary

  • A tcp request/response style communication exchange may
    hang when application is about to send a new packet and
    a pure ACK packet is received. Very rare timing scenario
    exposes this problem.
    

Problem conclusion

Temporary fix

Comments

  • This APAR is being closed FIN. This means that a solution to
    this APAR is expected to be delivered from IBM in a release
    (if any) to be available within the next 24 months.
    

APAR Information

  • APAR number

    IV50132

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2013-09-30

  • Closed date

    2014-02-26

  • Last modified date

    2014-03-11

Fix information

Applicable component levels

  • R610 PSY

       UP



Document information

More support for: AIX Enterprise Edition

Software version: 610

Operating system(s): AIX

Reference #: IV50132

Modified date: 11 March 2014