MainServlet: Error processing the request

Cannot open connection
org.hibernate.exception.GenericJDBCException: Cannot open connection
	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
	at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:363)
	at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:122)
	at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:105)
	at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1561)
	at org.hibernate.loader.Loader.doQuery(Loader.java:661)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
	at org.hibernate.loader.Loader.doList(Loader.java:2145)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
	at org.hibernate.loader.Loader.list(Loader.java:2024)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
	at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1129)
	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
	at org.jzonic.dao.hibernate.AbstractHibernateDAO.find(AbstractHibernateDAO.java:38)
	at de.stepstone.sites.model.dao.jdbc.HibernateSiteDAO.findAll(HibernateSiteDAO.java:28)
	at de.stepstone.sites.controller.DefaultController.handleSite(DefaultController.java:337)
	at de.stepstone.sites.controller.DefaultController.before(DefaultController.java:78)
	at org.jzonic.web.MainServlet.executeMethod(MainServlet.java:387)
	at org.jzonic.web.MainServlet.processRequest(MainServlet.java:262)
	at org.jzonic.web.MainServlet.doGet(MainServlet.java:514)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:266)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at de.stepstone.sites.filter.PrettyUrlFilter.doFilter(PrettyUrlFilter.java:52)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at de.stepstone.sites.filter.TimingFilter.doFilter(TimingFilter.java:30)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.jzonic.filter.HibernateSessionFilter.doFilter(HibernateSessionFilter.java:31)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at de.stepstone.sites.filter.EncodingFilter.doFilter(EncodingFilter.java:68)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:266)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:280)
	at com.caucho.server.port.TcpConnection.handleConnection(TcpConnection.java:563)
	at com.caucho.server.port.TcpConnection$AcceptTask.doAccept(TcpConnection.java:1122)
	at com.caucho.server.port.TcpConnection$AcceptTask.run(TcpConnection.java:1069)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:759)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:681)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.sql.SQLException: An SQLException was provoked by the following failure: com.mchange.v2.resourcepool.ResourcePoolException: A ResourcePool cannot acquire a new resource -- the factory or source appears to be down.
	at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
	at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
	at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:62)
	at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:531)
	at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
	at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
	at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:360)
	... 44 more
Caused by: com.mchange.v2.resourcepool.ResourcePoolException: A ResourcePool cannot acquire a new resource -- the factory or source appears to be down.
	at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1279)
	at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)
	at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
	at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
	... 47 more
The requested method: list was not found