com.mchange.v2.c3p0.ComboPooledDataSource

Hi Experts,
             
                   i keep getting "Connection Time out" while obtaining a connection using following datasource setup. I open the connection,update a table immediately,close the connection ( no looping or no complex logic written after opening a connection).Not sure why.I'm not getting it consistently rather i get it once in a while.Experts please have your say on this and please guide me how to go about resolving this.
Or is there some property i'm missing from my datasource definition

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
                        <property name="driverClass">
                                    <value>${db.driver}</value>
                        </property>
                        <property name="jdbcUrl">
                                    <value>${db.connection.uri}</value>
                        </property>
                        <property name="user">
                                    <value>${db.username}</value>
                        </property>
                        <property name="password">
                                    <value>${db.password}</value>
                        </property>
                        <property name="initialPoolSize">
                                    <value>0</value>
                        </property>
                        <property name="minPoolSize">
                                    <value>0</value>
                        </property>
                        <property name="maxPoolSize">
                                    <value>80</value>
                        </property>
                        <property name="acquireIncrement">
                                    <value>1</value>
                        </property>
                        <property name="maxStatements">
                                    <value>4000</value>
                        </property> 
                        <property name="numHelperThreads">
                                    <value>11</value>
                        </property>
            </bean>

Select allOpen in new window