java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.Children.getNodes(Children.java:469)
Caused: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.nodes.Node.assignTo(Node.java:354)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:212)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172)
   at org.openide.nodes.EntrySupportDefault.getNodesCount(EntrySupportDefault.java:176)
   at org.openide.nodes.Children.getNodesCount(Children.java:509)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalStateException: Cannot initialize 0th child of node org.netbeans.modules.db.explorer.node.CatalogNode[name=Default][Name=Default, displayName=Default]; it already belongs to node org.netbeans.modules.db.explorer.node.ConnectionNode[name=][Name=jdbc:derby://localhost:1527/sample [app on APP], displayName=jdbc:derby://localhost:1527/sample [app on APP]] (did you forgot to use cloneNode?)
Children of new node: null
Children of old node: null
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1495)
   at org.openide.nodes.AsynchChildren.refresh(AsynchChildren.java:133)
   at org.openide.nodes.ChildFactory.refresh(ChildFactory.java:167)
   at org.netbeans.api.db.explorer.node.ChildNodeFactory.refresh(ChildNodeFactory.java:77)
   at org.netbeans.api.db.explorer.node.BaseNode.update(BaseNode.java:284)
   at org.netbeans.api.db.explorer.node.BaseNode$1.stateChanged(BaseNode.java:231)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:133)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:119)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.stateChanged(NodeRegistry.java:182)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:133)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:119)
   at org.netbeans.api.db.explorer.node.NodeProvider.setNodes(NodeProvider.java:191)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$1.run(SchemaNodeProvider.java:121)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider$1.run(SchemaNodeProvider.java:102)
   at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:97)
   at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:92)
   at org.netbeans.modules.db.explorer.node.SchemaNodeProvider.initialize(SchemaNodeProvider.java:101)
   at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:107)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:167)
   at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:117)
   at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:167)
   at org.netbeans.api.db.explorer.node.ChildNodeFactory.createKeys(ChildNodeFactory.java:107)
   at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:209)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)