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PI71743: INCORRECT TCP STACK SELECTED WHEN USING TCPSTACK=SINGLE TCPNAME=

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Channel Initiator CHIN CHINIT experiences message ICH408I.
    Incorrect TCP stack is checked.
    CSQ1CHIN accesses tcpip stack TCP1 when the Listener is started
    and tcpstack is single. Incorrect TCPNAME is selected.
    TCPSTACK=SINGLE
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users of IBM MQ for z/OS Version 9 Release 0             *
    * Modification 0.                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Message ICH408I issued when starting an MQ listener with     *
    * TCPSTACK=SINGLE                                              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When starting an MQ TCP/IP listener with TCPSTACK=SINGLE, a
    TCP/IP socket is opened before the listener TCB has established
    affinity to the TCP/IP stack named in the TCPNAME parameter.
    
    Where access to any additional TCP/IP stacks on the system is
    prohibited by RACF security controls on the EZB.STACKACCESS.**,
    EZB.INITSTACK.**, or EZB.** profiles for class SERVAUTH then
    message ICH408I may be issued.
    
    This is caused by the listener TCB failing to set an affinity to
    the configured TCP/IP stack, prior to opening a socket to test
    the available protocols.
    

Problem conclusion

  • Processing has been amended to ensure that affinity to the
    TCP/IP stack named in the TCPNAME parameter is established prior
    to opening a socket.
    

Temporary fix

Comments

  • ×**** PE17/08/29 FIX IN ERROR. SEE APAR PI86572  FOR DESCRIPTION
    

APAR Information

  • APAR number

    PI71743

  • Reported component name

    MQ Z/OS V9

  • Reported component ID

    5655MQ900

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-11-03

  • Closed date

    2016-11-15

  • Last modified date

    2018-01-30

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

    PI67827

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

    UI42617 010PC2Ÿ

Modules/Macros

  • CSQXRCTL
    

Fix information

  • Fixed component name

    MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R000 PSY UI42617

       UP17/01/10 P F701

Fix is available

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Document Information

Modified date:
30 January 2018