java.lang.NullPointerException
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$SchemaComparator.compare(SchemaNodeProvider.java:149)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$SchemaComparator.compare(SchemaNodeProvider.java:146)
   at java.util.TreeMap.compare(TreeMap.java:1188)
   at java.util.TreeMap.put(TreeMap.java:531)
   at java.util.TreeSet.add(TreeSet.java:255)
   at java.util.AbstractCollection.addAll(AbstractCollection.java:334)
   at java.util.TreeSet.addAll(TreeSet.java:312)
   at org.netbeans.api.db.explorer.node.NodeProvider.setProxyNodes(NodeProvider.java:178)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$1.run(SchemaNodeProvider.java:116)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$1.run(SchemaNodeProvider.java:100)
   at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:97)
   at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:92)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider.initialize(SchemaNodeProvider.java:99)
   at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:112)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:167)
   at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:122)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:167)
   at org.netbeans.api.db.explorer.node.ChildNodeFactory.createKeys(ChildNodeFactory.java:107)
   at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:189)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)