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PK53169: EXCEPTION TARGET_BUFFER_EXHAUSTED AFTER UK27198 WHEN DEALING WITH NON-HTTP DATA THAT IS GREATER THAN 32 07/11/23 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • After having applied PTF UK27198, when message greater than 32K
    (x'7FFF') is received an exception will occur. -first w
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICS Users with PK41659 applied.         *
    ****************************************************************
    * PROBLEM DESCRIPTION: Mangled data in commarea passed to      *
    *                      non-HTTP application.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A TCPIPSERVICE is defined with PROTOCOL(USER). A non-HTTP
    request arrives for this TCPIPSERVICE. The analyzer examines
    the request and decides that more data needs to be received.
    A routine is called to copy the initial X'4000' byte block of
    data into a separate buffer to be used by the WEB API.
    The next block of data is read off the socket and appended to
    the first X'4000' byte block in the receive buffer. The receive
    buffer now contains X'53AA' bytes.
    The copy routine is called to copy the received data block to
    the data buffer which is used by the web API.
    However, instead of just appending the second block of data to
    the WEB API buffer, the entire receive buffer is appended.
    This means that the original X'4000' bytes of data received is
    duplicated in the WEB API buffer followed by the final block
    of data received off the socket.
    This results in a WEB API buffer which is X'93AA' bytes long.
    Later on the code which converts the request from ASCII to
    EBCDIC decides which buffer to pass to the conversion routine.
    If the request is deemed to be less than 32K long, the original
    receive buffer is passed to the conversion routines.
    However, the request appears to exceed 32K so the WEB API buffer
    is passed which contains duplicated data. The first 32K are
    converted but this does not match the data that was received
    off the socket.
    Before PK41659, the original receive buffer was always passed
    to the conversion routines so duplicated data could never end up
    in the application commarea.
    

Problem conclusion

  • UK27198 UK29111 UK29262
    DFHWBSR has been changed so that the WEB API buffer is only
    populated once all of a non-HTTP request has been received
    off the socket into the receive buffer.
    

Temporary fix

  • FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PK53169

  • Reported component name

    CICSTS V3 Z/OS

  • Reported component ID

    5655M1500

  • Reported release

    400

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2007-09-19

  • Closed date

    2007-11-30

  • Last modified date

    2008-01-02

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

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

    PK56864 UK31839

Modules/Macros

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

Fix information

  • Fixed component name

    CICSTS V3 Z/OS

  • Fixed component ID

    5655M1500

Applicable component levels

  • R400 PSY UK31839

       UP07/12/06 P F712

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.

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Document Information

Modified date:
02 January 2008