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PM07816: CONNECTION: KEEP-ALIVE HEADER IS ALWAYS SENT FROM THE RESPONSE BUILT BY CICS.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The client sends a request to CICS with a http header
    Connection:Keep-Alive.  CICS then closes the connection
    yet our response includes the "Connection: Keep-Alive"
    header.  When the client attempts another request using
    the same connection, it fails.
    CICS will always close the connection on VSE.  However,
    the code that builds up the HTTP response currently
    always adds a Connection: Keep-Alive header if the
    client sent one in.  This APAR will will remove the
    Connection: Keep-Alive header from the response built
    by CICS.
    Additional Symptom(s) Search Keyword(s):
    KIXREVSCB
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICS users.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: CICS Web Support returns a keep-alive   *
    *                      header to an application but closes     *
    *                      the connection.                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The CICS Web Support for CICS TS for VSE/ESA does not support
    persistent connections, but DFHWBBLI will cause a Connection
    Keep-Alive header to be placed in the output data in some
    circumstances before closing the socket.
    
    While this does not cause a problem for the typical browser
    session, a customer application may identify this header
    and expect that the connection is still active.
    

Problem conclusion

  • DFHWBBLI has been changed to avoid the Keep-Alive header being
    added.
    

Temporary fix

  • FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PM07816

  • Reported component name

    CICSTS FOR VSE

  • Reported component ID

    564805400

  • Reported release

    B0P

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-02-17

  • Closed date

    2010-05-19

  • Last modified date

    2010-11-04

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UK57109

Modules/Macros

  •    DESWBAP  DESWBBLI DESWBDM  DESWBRQ  DESWBSR
    DESWBXM  DFHWBAP  DFHWBAPF DFHWBBLI DFHWBDM  DFHWBRQS DFHWBSR
    DFHWBXM
    

Fix information

  • Fixed component name

    CICSTS FOR VSE

  • Fixed component ID

    564805400

Applicable component levels

  • RB0P PSY UK57109

       UP10/05/24 P E430

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU011","label":"Systems - zSystems software"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.1.1","Edition":""}]

Document Information

Modified date:
04 November 2010