java.lang.ClassCastException: org.netbeans.modules.db.explorer.node.DriverListNode cannot be cast to java.lang.Comparable
   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 org.netbeans.api.db.explorer.node.NodeProvider.addNode(NodeProvider.java:200)
   at org.netbeans.modules.db.explorer.node.DriverListNodeProvider.<init>(DriverListNodeProvider.java:71)
   at org.netbeans.modules.db.explorer.node.DriverListNodeProvider.<init>(DriverListNodeProvider.java:53)
   at org.netbeans.modules.db.explorer.node.DriverListNodeProvider$FactoryHolder$1.createInstance(DriverListNodeProvider.java:64)
   at org.netbeans.modules.db.explorer.node.DriverListNodeProvider$FactoryHolder$1.createInstance(DriverListNodeProvider.java:62)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.initProviders(NodeRegistry.java:139)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.init(NodeRegistry.java:117)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.create(NodeRegistry.java:100)
   at org.netbeans.api.db.explorer.node.BaseNode.<init>(BaseNode.java:165)
   at org.netbeans.api.db.explorer.node.BaseNode.<init>(BaseNode.java:149)
   at org.netbeans.modules.db.explorer.node.RootNode.<init>(RootNode.java:103)
   at org.netbeans.modules.db.explorer.node.RootNode.instance(RootNode.java:85)
   at org.netbeans.modules.db.explorer.DatabaseConnection.findConnectionNode(DatabaseConnection.java:1127)
   at org.netbeans.modules.db.explorer.DatabaseConnection.showConnectionDialog(DatabaseConnection.java:1088)
   at org.netbeans.api.db.explorer.ConnectionManager.showConnectionDialog(ConnectionManager.java:354)
   at org.netbeans.modules.db.sql.loader.SQLEditorSupport$SQLExecutor$1.run(SQLEditorSupport.java:517)
   at org.netbeans.modules.db.sql.loader.SQLEditorSupport$SQLExecutor$1.run(SQLEditorSupport.java:514)
   at org.openide.util.Mutex$1AWTWorker.run(Mutex.java:1377)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.ClassCastException: org.netbeans.modules.db.explorer.node.DriverListNode cannot be cast to java.lang.Comparable
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1459)
   at org.netbeans.modules.db.sql.loader.SQLEditorSupport.execute(SQLEditorSupport.java:366)
   at org.netbeans.modules.db.sql.loader.SQLCloneableEditor$SQLExecutionImpl.execute(SQLCloneableEditor.java:558)
   at org.netbeans.modules.db.sql.editor.ui.actions.RunSQLAction.actionPerformed(RunSQLAction.java:94)
   at org.netbeans.modules.db.sql.editor.ui.actions.SQLExecutionBaseAction$ContextAwareDelegate.actionPerformed(SQLExecutionBaseAction.java:202)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
   at java.awt.Component.processMouseEvent(Component.java:6504)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6269)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4860)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:138)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)