java.lang.AssertionError: Somebody changed internal state meanwhile!
Expected: Inited: true
Thread: Thread[org.netbeans.modules.project.ui.ProjectTab,1,system]
InProgress: true
MustNotify: false
Entries: 5; vis. entries: 5; Infos: 5; entriesSize: 5; entryToInfoSize: 5
1 entry Children.Keys.KE[S\modules\clusters\petshop\petshop.plugin\petshoplogrest\src@a44d9714:618eb15,0],0] -> EntryInfo for entry: Children.Keys.KE[S\modules\clusters\petshop\petshop.plugin\petshoplogrest\src@a44d9714:618eb15,0],0], node: null
2 entry Children.Keys.KE[dules\clusters\petshop\petshop.plugin\petshoplogrest\target@2a5948c1:3e686d68,0],0] -> EntryInfo for entry: Children.Keys.KE[dules\clusters\petshop\petshop.plugin\petshoplogrest\target@2a5948c1:3e686d68,0],0], node: null
3 entry Children.Keys.KE[\petshop\petshop.plugin\petshoplogrest\nb-configuration.xml@bbefe954:18cd64d2,0],0] -> EntryInfo for entry: Children.Keys.KE[\petshop\petshop.plugin\petshoplogrest\nb-configuration.xml@bbefe954:18cd64d2,0],0], node: null
4 entry Children.
   at org.openide.nodes.EntrySupportLazy.setState(EntrySupportLazy.java:87)
   at org.openide.nodes.EntrySupportLazy.removeEntries(EntrySupportLazy.java:817)
   at org.openide.nodes.EntrySupportLazy.setEntries(EntrySupportLazy.java:463)
   at org.openide.nodes.EntrySupport.setEntries(EntrySupport.java:83)
   at org.openide.nodes.Children$Keys$2.run(Children.java:1573)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation$1Exec.run(DefaultMutexImplementation.java:1016)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1938)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:1022)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:985)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.postWriteRequest(DefaultMutexImplementation.java:356)
   at org.openide.util.Mutex.postWriteRequest(Mutex.java:388)
   at org.openide.nodes.Children$Keys.applyKeys(Children.java:1582)
   at org.openide.nodes.Children$Keys.setKeys(Children.java:1526)
   at org.openide.loaders.FolderChildren.applyKeys(FolderChildren.java:132)
   at org.openide.loaders.FolderChildren$1R.run(FolderChildren.java:198)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Somebody changed internal state meanwhile!
Expected: Inited: true
Thread: Thread[org.netbeans.modules.project.ui.ProjectTab,1,system]
InProgress: true
MustNotify: false
Entries: 5; vis. entries: 5; Infos: 5; entriesSize: 5; entryToInfoSize: 5
1 entry Children.Keys.KE[S\modules\clusters\petshop\petshop.plugin\petshoplogrest\src@a44d9714:618eb15,0],0] -> EntryInfo for entry: Children.Keys.KE[S\modules\clusters\petshop\petshop.plugin\petshoplogrest\src@a44d9714:618eb15,0],0], node: null
2 entry Children.Keys.KE[dules\clusters\petshop\petshop.plugin\petshoplogrest\target@2a5948c1:3e686d68,0],0] -> EntryInfo for entry: Children.Keys.KE[dules\clusters\petshop\petshop.plugin\petshoplogrest\target@2a5948c1:3e686d68,0],0], node: null
3 entry Children.Keys.KE[\petshop\petshop.plugin\petshoplogrest\nb-configuration.xml@bbefe954:18cd64d2,0],0] -> EntryInfo for entry: Children.Keys.KE[\petshop\petshop.plugin\petshoplogrest\nb-configu
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.openide.loaders.FolderChildren.refreshChildren(FolderChildren.java:233)
   at org.openide.loaders.FolderChildren.addNotify(FolderChildren.java:457)
   at org.openide.nodes.Children.callAddNotify(Children.java:575)
   at org.openide.nodes.EntrySupportLazy.checkInit(EntrySupportLazy.java:116)
   at org.openide.nodes.EntrySupportLazy.getNodeAt(EntrySupportLazy.java:242)
   at org.openide.nodes.Children.getNodeAt(Children.java:453)
   at org.openide.loaders.FolderChildren.findChild(FolderChildren.java:397)
   at org.openide.nodes.FilterNode$Children$LazySupport.findChild(FilterNode.java:1802)
   at org.openide.nodes.FilterNode$Children.findChild(FilterNode.java:1532)
   at org.openide.nodes.FilterNode$Children$LazySupport.findChild(FilterNode.java:1802)
   at org.openide.nodes.FilterNode$Children.findChild(FilterNode.java:1532)
   at org.openide.nodes.NodeOp.findChild(NodeOp.java:275)
   at org.openide.nodes.NodeOp.findPath(NodeOp.java:293)
   at org.openide.nodes.NodeOp.findPath(NodeOp.java:323)
   at org.netbeans.modules.project.ui.ProjectTab$ProjectTreeView.expandNodes(ProjectTab.java:782)
   at org.netbeans.modules.project.ui.ProjectTab$KeepExpansion.run(ProjectTab.java:461)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)