Error occur everyday after i have set the configuration in hibernate.cfg.xml as below.

<property name="c3p0.acquire_increment">5</property>
<property name="c3p0.idle_test_period">10</property> <!-- seconds -->
<property name="c3p0.min_size">5</property>
<property name="c3p0.max_size">300</property>
<property name="c3p0.timeout">1</property>
<property name="c3p0.max_statements">300</property>

1) The below error happen every next morning and can be solved by restarting the web server everyday. Please help to resolve. Any suggestion on configuring the properties and value?

Caused by: java.sql.SQLException: An SQLException was provoked by the following failure: com.mchange.v2.resourcepool.ResourcePoolException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:68)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:57)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:213)
at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:64)
at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:298)
... 47 more
Caused by: com.mchange.v2.resourcepool.ResourcePoolException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:870)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:201)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:209)
... 50 more