Java WebStart se desconecta luego de cierto tiempo inactivo

[tronco020]

PARTE 1:
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Código:

22/12/2011 15:07:35 org.hibernate.util.JDBCExceptionReporter logExceptions
ADVERTENCIA: SQL Error: 0, SQLState: 08006
22/12/2011 15:07:35 org.hibernate.util.JDBCExceptionReporter logExceptions
GRAVE: Un error de E/S ha ocurrido mientras se enviaba al backend.
Exception in thread "AWT-EventQueue-0" org.hibernate.exception.JDBCConnectionException: could not execute query
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	at org.hibernate.loader.Loader.doList(Loader.java:2223)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
	at org.hibernate.loader.Loader.list(Loader.java:2099)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
	at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
	at Parametros.Bienes.buscaUltimo(Bienes.java:138)
	at Parametros.Bienes.inicializarFormulario(Bienes.java:118)
	at Parametros.Bienes.focoObtenido(Bienes.java:155)
	at Parametros.Bienes.fld_CodigoFocusGained(Bienes.java:1572)
	at Parametros.Bienes.access$700(Bienes.java:22)
	at Parametros.Bienes$7.focusGained(Bienes.java:1156)
	at java.awt.AWTEventMulticaster.focusGained(Unknown Source)
	at java.awt.Component.processFocusEvent(Unknown Source)
	at javax.swing.JFormattedTextField.processFocusEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.SequencedEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.postgresql.util.PSQLException: Un error de E/S ha ocurrido mientras se enviaba al backend.
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:218)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254)
	at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
	at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
	at org.hibernate.loader.Loader.doQuery(Loader.java:674)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
	at org.hibernate.loader.Loader.doList(Loader.java:2220)
	... 59 more
Caused by: java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(Unknown Source)
	at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:135)
	at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:104)
	at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:73)
	at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:259)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1166)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:192)
	... 67 more