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PI69442: SYSTCPD DD STATEMENT TO RESOLVE DNS IS IGNORED

A fix is available

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APAR status

  • Closed as program error.

Error description

  • After upgrade from MQ V7.1 the SYSTCPD DD Statement to
    resolve DNS in a different TCPIP stack is ignored.
    An LPAR with 2 TCPIP stacks is used. After migration of MQ
    the stack defined in SYSTCPD is no longer be used.
    
    A resolver trace shows that the default TCPIP stack
    /etc/resolve.conf
    is being used, instead the one defined in SYSTCPD.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users of IBM MQ for z/OS Version 9 Release 0             *
    * Modification 0.                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * The TCP/IP configuration defined in the Channel Initiator's  *
    * SYSTCPD DD statement is ignored when /etc/resolv.conf is     *
    * defined in HFS or zFS on the system.                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * None                                                         *
    ****************************************************************
    The internal interface used by MQ for for TCP/IP nameserver
    lookups has changed. This new interface uses a different set of
    precedence rules to locate the TCP/IP configuration. When a
    /etc/resolv.conf configuration is found in HFS or zFS, this is
    used in preference to a Chinit specific SYSTCPD configuration.
    This is different from the order of precedence in version 7 of
    MQ and prevents customers from overriding the TCP/IP
    configuration at a per-Chinit level when a system-wide
    /etc/resolv.conf file exists.
    

Problem conclusion

  • Processing has been amended to ensure that a Chinit-specific
    SYSTCPD DD takes precedence over /etc/resolv.conf. If the
    configuration at /etc/resolv.conf should be used, then the
    Chinit SYSTCPD DD should be removed.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI69442

  • 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

    2016-09-20

  • Closed date

    2016-09-22

  • Last modified date

    2016-11-02

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

    PI67140

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

    UI40989

Modules/Macros

  • CSQXTENT
    

Fix information

  • Fixed component name

    MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R000 PSY UI40989

       UP16/10/14 P F610

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 November 2016