Progress Sonic ESB Configuration and Management Guide

Chapter 5: Using the Database Service JDBC Drivers
JDBC Driver Connection Properties and the Database
Service
The Database Service reconnect timeout might expire while the JDBC driver failover or
retry is taking place. In this event, if the JDBC driver failover or connection retry
operations exceed the Database Service connection Timeout limit, the connection will not
succeed and the associated Database Service operation will fail, resulting in an error
message being sent to the rejected message endpoint (RME.)
The Database Service reconnect is not the same as the JDBC driver connection retry. The
Database Service is not aware of a connection failure until the JDBC driver connection
retry is unsuccessful. When the Database Service attempts a reconnection, the JDBC
driver acts as if this is a new database connection and the driver load balancing, failover,
and connection retry parameters are all used as if an initial database connection is being
established.
Load Balancing, Failover, and Connection Retry
To optimize performance, you can implement client load balancing, connection failover,
and connection retry in your Database Service connection properties. To do this, specify
both primary and alternate servers in the connection URL. The following sections explain
these features:
● “Client Load Balancing” on page 131
● “Connection Failover” on page 132
● “Connection Retry” on page 133
129 Progress Sonic ESB Configuration and Management Guide 8.5