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1. how to close hibernate tools db connections    stackoverflow.com

When developing a new project I often want to re-create the schema to apply any new entities or relationships created. I like using hibernate tools in eclipse, but it's a pain ...

2. Postgresql + Hibernate3 + C3p0 = not closing connections    stackoverflow.com

This only happens until peak load of the system. Hibernate exception: 

org.hibernate.exception.JDBCConnectionException: could not execute query
org.postgresql.util.PSQLException: An I/O error occured while sending to the backend. java.io.IOException: Stream closed 
postgresql log entry: 2011-08-10 05:27:35 UTC LOG: ...

3. c3p0 postgresql, whole pool breaks on 1 connection refuse    forum.hibernate.org