Clustered environment considerations for timer service

In a single server environment, it is clear which server instance should invoke the ejbTimeout() method on a given bean. In a multi-server clustered environment there are two possibilities.

See Configuring a Timer Service for information on how to configure the data source (database) to be used for each server process timer service. Note that once the data source for the timer service is changed to point to a different database, the server process automatically attempts to create the required tables in that database on the next server start. If the userid associated with the start of the server process is not authorized to create database tables in the configured timer service database, then the tables must be created manually. For more information, see Creating scheduler tables using DDL files.




Subtopics
Timer service commands
Related tasks
Developing Enterprise JavaBeans 2.1 for the timer service
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