org.apache.derby.client.am.SqlException: No current connection.
        at org.apache.derby.client.am.Connection.checkForClosedConnection(Connection.java:0)
Caused: java.sql.SQLNonTransientConnectionException: No current connection.
        at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:0)
        at org.apache.derby.client.am.SqlException.getSQLException(SqlException.java:0)
        at org.apache.derby.client.am.Connection.getCatalog(Connection.java:0)
Caused: org.netbeans.modules.db.metadata.model.api.MetadataException: java.sql.SQLNonTransientConnectionException: No current connection.
        at org.netbeans.modules.db.metadata.model.jdbc.JDBCMetadata.createCatalogs(JDBCMetadata.java:162)
        at org.netbeans.modules.db.metadata.model.jdbc.JDBCMetadata.initCatalogs(JDBCMetadata.java:183)
        at org.netbeans.modules.db.metadata.model.jdbc.JDBCMetadata.getCatalog(JDBCMetadata.java:107)
        at org.netbeans.modules.db.metadata.model.api.Metadata.getCatalog(Metadata.java:108)
        at org.netbeans.modules.db.metadata.model.api.MetadataElementHandle.resolveCatalog(MetadataElementHandle.java:202)
        at org.netbeans.modules.db.metadata.model.api.MetadataElementHandle.resolveSchema(MetadataElementHandle.java:206)
        at org.netbeans.modules.db.metadata.model.api.MetadataElementHandle.resolve(MetadataElementHandle.java:175)
        at org.netbeans.modules.db.explorer.node.SchemaNode$2.run(SchemaNode.java:113)
        at org.netbeans.modules.db.explorer.node.SchemaNode$2.run(SchemaNode.java:111)
Caused: org.netbeans.modules.db.metadata.model.api.MetadataModelException: org.netbeans.modules.db.metadata.model.api.MetadataException: java.sql.SQLNonTransientConnectionException: No current connection.
        at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:99)
        at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:89)
        at org.netbeans.modules.db.explorer.node.SchemaNode.setupNames(SchemaNode.java:110)
        at org.netbeans.modules.db.explorer.node.SchemaNode.updateProperties(SchemaNode.java:126)
        at org.netbeans.api.db.explorer.node.BaseNode.update(BaseNode.java:246)
        at org.netbeans.api.db.explorer.node.BaseNode$1.stateChanged(BaseNode.java:196)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:123)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:109)
        at org.netbeans.modules.db.explorer.node.NodeRegistry.stateChanged(NodeRegistry.java:164)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:123)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:109)
        at org.netbeans.api.db.explorer.node.NodeProvider.setNodes(NodeProvider.java:186)
        at org.netbeans.modules.db.explorer.node.ConnectedNodeProvider.initialize(ConnectedNodeProvider.java:94)
        at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:103)
        at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:149)
        at org.netbeans.api.db.explorer.node.ChildNodeFactory.createKeys(ChildNodeFactory.java:104)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:164)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)