SEVERE: The web application [/testContext] appears to have started a thread named [Resource Destroyer in BasicResourcePool.close()] but has failed to stop it. This is very likely to create a memory leak.

public synchronized void close( boolean close_checked_out_resources )
{

........

Thread resourceDestroyer = new Thread("Resource Destroyer in BasicResourcePool.close()")
            {
                public void run()
                {
                    for (Iterator ii = cleanupResources.iterator(); ii.hasNext() ;)
                    {
                        try
                        {
                            Object resc = ii.next();
                            //System.err.println("Destroying resource... " + resc);

                            destroyResource( resc, true );
                        }
                        catch (Exception e)
                        {
                            if (Debug.DEBUG) 
                            {
                                //e.printStackTrace();
                                if ( logger.isLoggable( MLevel.FINE ) )
                                    logger.log( MLevel.FINE, "BasicResourcePool -- A resource couldn't be cleaned up on close()", e );
                            }
                        }
                    }
                }
            };
.....

}

	private static boolean closeSessionFactoryIfC3P0ConnectionProvider(SessionFactory factory) 
        {
		boolean done = false;
		if(factory instanceof SessionFactoryImpl) 
               {
			SessionFactoryImpl sf = (SessionFactoryImpl)factory;
			ConnectionProvider conn = sf.getConnectionProvider();
			if(conn instanceof C3P0ConnectionProvider) 
                        { 
				((C3P0ConnectionProvider)conn).close(); 
				try 
                                {
					Thread.sleep(2000); //Let give it time...it is enough?...probably....
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				done = true;
			}
		}
		return done;
	}