No operations allowed after connection closed.Connection was implicitly closed by the driver. C3P0

Question

I am trying to upload images(one by one) using c3p0 connection pooling but my jdbc type 4 driver(connecting to mysql) keeps on closing the connection. I have seen that the maximum timeout in the configuration of mysql is set to 300 seconds. Here is how my persistence xml uses c3p0.

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
    scope="singleton" destroy-method="close">
    <property name="driverClass" value="...." />
    <property name="jdbcUrl" value="...." />
    <property name="user" value="....." />
    <property name="password" value="...." />
    <property name="initialPoolSize" value="10" />
    <property name="minPoolSize" value="5" />
    <property name="maxPoolSize" value="20" />
    <property name="maxIdleTime" value="5" />
    <property name="autoCommitOnClose" value="false" />
</bean>

Can someone explain what exactly is causing the driver to implicitly close the connection. Also, how can i reolve this issue?

Here is the error message I get:

19:01:45,504  WARN NewPooledConnection:486 - [c3p0] A PooledConnection that has already signalled a Connection error is still in use!

19:01:45,505  WARN NewPooledConnection:487 - [c3p0] Another error has occurred [ 

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed by the driver. ] which will not be reported to listeners!

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed by the driver.

Answer 1

Can you change this to

<property name="maxIdleTime" value="0" />  //0 = never expire