java - MySQL connection timeout

Question

I'm running program at apache tomcat server, that should be on permanently, but every morning(the client part isn't accessible at night) i receive error message (in apache tomcat console) that MySQL server is off. So is there any way to prevent this? Thanks in advance!

Answer 1

Yes, I have had the same problem. Try to add a validationQuery to your DataSource.

Here is how I have defined mine:

<Resource auth="Container"
          type="javax.sql.DataSource"
          name="jdbc/gporder"
          driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost/mydb"
          maxActive="10"
          maxIdle="5"
          validationQuery="SELECT 1"
          testOnBorrow="true"
          testWhileIdle="true"
          timeBetweenEvictionRunsMillis="10000"
          minEvictableIdleTimeMillis="60000"
          username="..." password="..."/>