I use EJB3 to connect to Postgres 8.1. At random times, I get a database connection error: | No ManagedConnections available within configured blocking timeout ( 30000 [ms] ); - nested throwable: (javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] )) | | <local-tx-datasource> | <jndi-name>MyDS</jndi-name> | <connection-url>jdbc:postgresql://cherry/pgacms</connection-url> | <driver-class>org.postgresql.Driver</driver-class> | <user-name>...</user-name> | <password>...</password> | <min-pool-size>5</min-pool-size> | <max-pool-size>30</max-pool-size> | <new-connection-sql>SELECT version()</new-connection-sql> | <check-valid-connection-sql>SELECT version()</check-valid-connection-sql> | | </local-tx-datasource> | I have checked, and the max number of connections defined for all my datasources is less than the maximum connections that Postgres allows. From what I have read about this error, most people say that the database connection is not being closed correctly in the java code. So my question, since I am using EJB3 for my database connection, do I have to do anything to explicitly close the connection? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4035323#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...