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Sunday, October 18, 2009

Tomcat DBCP DataSource falls idle overnight

If you have a low activity web server using Tomcat DBCP to retrieve connections to your database, the database server might time out connections in the pool.

Adding the following to your <Resource> configuration can address the problem.
  • testOnBorrow="true"
  • validationQuery="SELECT 1 /* ping */"


  1. be carefull, "SELECT 1" doesn't work everywhere, for example mysql do, but postresql don't ^^

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