title: Weird Error: CLOSE BY CLIENT STACK TRACE
body: <p>Hi all I have a web application which use Hibernate to retrieve data in the database. And in the server side some execeptions come out at regular interval. Below is the exception logs.</p>
  
  <pre><code>    16:04:22,227 DEBUG NewPooledConnection:491 - com.mchange.v2.c3p0.impl.NewPooledConnection@ef46613 closed by a client.
      java.lang.Exception: DEBUG -- CLOSE BY CLIENT STACK TRACE
          at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:491)
          at com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:191)
          at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:470)
          at com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:964)
          at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
      16:09:42,310 DEBUG C3P0PooledConnectionPool:476 - Successfully destroyed PooledConnection: com.mchange.v2.c3p0.impl.NewPooledConnection@32ef0763
      16:09:42,310 DEBUG BasicResourcePool:967 - Successfully destroyed resource: com.mchange.v2.c3p0.impl.NewPooledConnection@32ef0763
      16:09:42,310 DEBUG GooGooStatementCache:319 - ENTER METHOD: closeAll( org.postgresql.jdbc4.Jdbc4Connection@42df0af8 )! -- num_connections: 1
  </code></pre>
  
  <p>Could anyone helps me with this problem? Thanks a lot!</p>