java.lang.NullPointerException
        at org.netbeans.modules.db.explorer.node.ColumnNode$2.run(ColumnNode.java:220)
        at org.netbeans.modules.db.explorer.node.ColumnNode$2.run(ColumnNode.java:217)
        at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:94)
        at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:89)
        at org.netbeans.modules.db.explorer.node.ColumnNode.getPosition(ColumnNode.java:216)
        at org.netbeans.modules.db.explorer.node.ColumnNodeProvider$ColumnComparator.compare(ColumnNodeProvider.java:146)
        at org.netbeans.modules.db.explorer.node.ColumnNodeProvider$ColumnComparator.compare(ColumnNodeProvider.java:140)
        at java.util.TreeMap.compare(TreeMap.java:1093)
        at java.util.TreeMap.put(TreeMap.java:465)
        at java.util.TreeSet.add(TreeSet.java:210)
        at java.util.AbstractCollection.addAll(AbstractCollection.java:318)
        at java.util.TreeSet.addAll(TreeSet.java:258)
        at org.netbeans.api.db.explorer.node.NodeProvider.setNodes(NodeProvider.java:183)
        at org.netbeans.modules.db.explorer.node.ColumnNodeProvider.initialize(ColumnNodeProvider.java:137)
        at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:103)
        at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:149)
        at org.netbeans.api.db.explorer.node.ChildNodeFactory.createKeys(ChildNodeFactory.java:104)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:158)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)