java.sql.SQLException: no database metadata available
   at org.netbeans.lib.ddl.adaptors.DefaultAdaptor.isReadOnly(DefaultAdaptor.java:438)
   at org.netbeans.modules.db.explorer.node.ConnectionNode.updateLocalProperties(ConnectionNode.java:181)
   at org.netbeans.modules.db.explorer.node.ConnectionNode.access$200(ConnectionNode.java:75)
   at org.netbeans.modules.db.explorer.node.ConnectionNode$2.run(ConnectionNode.java:319)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)