Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved


Chapter 3 Fault Tolerance and Load Balancing in a EMS-Based Administration Domain : Overview

Overview
TIBCO Administrator provides fault tolerance and load balancing capabilities for client applications. To allow client applications to access the same data from multiple administration servers, a primary server and one or more secondary servers can be installed. Each server should be installed on a separate machine and each machine must be part of the same administration domain.
When you use TIBCO Enterprise Message Service for your domain transport, both the primary and secondary servers use the same database and same EMS server. Secondary servers function exactly like the primary server and can deploy, undeploy, and delete applications. Note that Fault Torlerance Administration servers only applies to management tasks and clients must use local data.
If the administration domain is created using TIBCO Enterprise Message Service as the transport and the version of TIBCO Hawk installed is 4.9.0, an extra topic (_LOCAL.HAWK.DUPCHECK) is required to start the domain hawkagent. Add the topic entry in the topics.conf file.
Multiple Secondary Administration Servers
If multiple secondary administration servers are used:
If you make updates to the configuration using either the TIBCO Domain Utility (recommended) or by editing the tibcoadmin_domain-name.tra files, you must restart the administration server on each machine so the changes take effect.
Secondary Administration Server Startup Fails
When setting up a primary and a secondary administration server, if startup of the secondary server fails because it cannot get its initial data, a stack trace message starting with the following appears in the secondary server's console and log file:
 
java.lang.Exception: Load security program error:null
To resolve this, verify that the time zone settings on the machines that host the primary and secondary servers are in sync.

Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved