25 Jan 12:32:56 WARN com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2 com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@15971ce -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Too many connections
   at sun.reflect.GeneratedConstructorAccessor134.newInstance(Unknown Source)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
   at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
   at com.mysql.jdbc.Util.getInstance(Util.java:381)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)
   at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4011)
   at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1284)
   at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2142)
   at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:781)
   at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
   at sun.reflect.GeneratedConstructorAccessor133.newInstance(Unknown Source)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
...

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/snaps</property>
        <property name="connection.username">xxx</property>
        <property name="connection.password">xxx</property>

        <!-- Set up C3P0 JDBC connection pool -->
        <property name="hibernate.c3p0.min_size">5</property>
        <property name="hibernate.c3p0.max_size">20</property>
        <property name="hibernate.c3p0.timeout">1800</property> <!-- seconds -->
        <property name="hibernate.c3p0.max_statements">50</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout? -->
        <property name="show_sql">false</property>
       
        <mapping resource="various .hbm.xml files listed here"/>       
    </session-factory>
</hibernate-configuration>