PH07647: LOG INFORMATION ABOUT CAUSE OF HIGHAVAILABILITY TAKEOVER

9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• The WebSphere Application Server Load Balancer for IPv4 and
  IPv6 should record information about the cause of a
  highavailability takeover.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Load Balancer for IPv4 and    *
  *                  IPv6 users                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: Provide reason for takeovers when a     *
  *                      high availability failover occurs.      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The High Availability feature enables the backup to takeover
  when necessary but often the reason for the takeover is
  unknown.
  The user can find the reason for the takeover after applying
  this change.
  

Problem conclusion

• When using the load balancer for ipv4 and ipv6, information is
  recorded in different locations depending on the operating
  system. The reason for a high availability takeover is
  recorded on the load balancer which assumed the active
  forwarding role and can be searched for based upon the string
  "HA TAKEOVER".
  
  On Windows, this information is recorded in the ibmlb2.log
  found in the dispatcher logs directory. The operating system
  may not show data in this log until the executor is stopped.
  
  On Linux, this information is recorded in /var/log/messages.
  
  On AIX, this information was previously stored in memory and
  could only be viewed if extracted from the executor using
  executor trace formatting and if extracted before the trace
  buffer filled and was overwritten. With this change, the
  information is written to syslog. It is written based upon
  KERN facility and with priority NOTICE; The syslog.conf should
  be updated to include this reporting if it is desired.
  
  Fix included in fixpacks 8.5.5.16 and 9.0.0.11.
  

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

  WS EDGE LB IPV4

• Fixed component ID

  5724H8812

Applicable component levels

• R850 PSY

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