IT18158: MQ 8 APPLIANCE: HOST NAME RESOLUTION ERROR IS REPORTED WHEN AN APPLIANCE IS REBOOTED OR WEB SERVER IS STARTED/RESTARTED.

APAR status

• Closed as program error.

Error description

• The following errors can be observed in the error report:
  
  20160930T073210.550Z [0x80e00783][network][error]
  dns(Main-Name-Service): tid(1103): Cannot resolve host name
  'XYZ' after 25 ms.
  
  20160930T073210.550Z [0x80e00783][network][error]
  dns(Main-Name-Service): tid(1103): Cannot resolve host name
  'XYZ' after 25 ms.
  
  20161003T122305.390Z [0x80e00173][network][error] : tid(1967):
  TCP
  connection attempt refused from 1.2.3.4 to 1.2.3.5 port 1111
  
  These errors do not impact MQ appliance functionality and may
  be ignored.
  

Local fix

• Setting host alias by running the following command for the
  local host resolves this error.
  
  host-alias
  ip-address 127.0.0.1
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  MQ Appliance users
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A DNS resolution error was incorrectly reported in the MQ
  Appliance error report when a host-alias existed with an
  alternate IP version (IPv4 vs. IPv6).
  

Problem conclusion

• The code is modified such that the IPv6 DNS lookup of an IPv4
  host-alias does not result in an external DNS lookup.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.7
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  IBM MQ APPL M20

• Fixed component ID

  5725S1400

Applicable component levels

• R800 PSY

     UP