PI69442: SYSTCPD DD STATEMENT TO RESOLVE DNS IS IGNORED

Obtain the fix for this APAR.

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 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

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