My configuration: <Resource auth="Container" name="jdbc/cdb.mysql" defaultAutoCommit="false" driverClassName="com.mysql.jdbc.Driver" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" url="jdbc:mysql://XXXXX.com/XXXX_dev?sessionVariables=TRANSACTION ISOLATION LEVEL READ COMMITTED" username="XXXXX" password="XXXXX"
maxActive="100" maxIdle="100" minIdle="10" initialSize="10" maxWait="10000" testOnBorrow="true" type="javax.sql.DataSource" validationQuery="SELECT 1"/> I have testOnBorrow and validationQuery set as you suggest, so I do not think that is the issue. Thanks, Colin