Duplicating Tomcat and the TAC web application - 8.0

Talend Big Data Installation Guide for Linux

English (United States)
Big Data for Linux
Talend Big Data
Talend Activity Monitoring Console
Talend Administration Center
Talend Artifact Repository
Talend CommandLine
Talend Data Preparation
Talend Data Stewardship
Talend Identity and Access Management
Talend Installer
Talend JobServer
Talend Log Server
Talend Runtime
Talend Studio
Installation and Upgrade


  1. Duplicate this Tomcat instance on different servers, as many times as needed.
    Warning: It is not supported to have the different Talend Administration Center Tomcat servers on the same OS instance when configuring high availability.
    Warning: Make sure that system clocks of databases and servers are synchronized (the clocks must be within a second of each other). For more information on time-sync services, please refer to the appropriate Microsoft documentation about SNTP, Windows Time Service tools and Network Clocks.
  2. Duplicate the org.talend.administrator Web application to all Tomcat instances. Make sure that all Web application configurations are identical.
  3. Launch one Tomcat instance following the commands given in Deploying Talend Administration Center on Apache Tomcat.
  4. Launch the other instances of Tomcat following the same procedure.


Fail-over will occur when one of the multiple execution servers fails while in the midst of executing one or more tasks. When a server fails, the other servers of the cluster detect the condition and identify the tasks in the database that were in progress within the failed server. Any tasks marked for recovery will be taken over by another server.

Note that the ranking of servers to be used for load balancing is based on indicators, whose bounds (such as free disk space limits) and weight are defined in the file: monitoring_client.properties which is located in <ApplicationPath>/WEB-INF/lib/org.talend.monitoring.client-A.B.C.jar. These values can be edited according to your needs. For more information, see Configuring the indicators which determine which server to be used for load balancing.

Note: One known minor issue related to the DST change might prevent the failover to operate properly. However as a simple workaround, simply restart Tomcat after the time change. This should have no impact on executions.