After applying modifications for using good libraries, it works very well.
Thanks a lot for your explanation and solution.

Emmanuel.


>>Connection.isValid() is a JDBC4 method and hence is only available in
>>Java 6.

>>Tomcat 6 has to work with Java 5 and therefore ships with a database
>>connection pooling implementation for Java 5 that implements JBDC 3, not
>>JDBC 4.

>>To use JDBC 4 methods, you'll need to do the following:
>>- Add commons-dbcp 1.4 to $CATALINA_HOME/lib
>>- Add commons-pool 1.5.5 to $CATALINA_HOME/lib
>>- Change your resource definition to include the following attribute:
>>  factory="org.apache.commons.dbcp.BasicDataSourceFactory"

>>Mark

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