FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux knucklepuck 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
An ArrayIndexOutOfBoundsException is thrown on the JavaFX Application Thread when a TreeTableView's selection model is updated in response to a TreeItem being expanded.

The TreeTableView is allowing multiple selections, and my application is trying to select all child nodes of a selected TreeItem when that TreeItem is expanded.

There is a FilteredList that was created from the `getSelectedItems()` ObservableList of the TreeTableView's selection model. The exception is thrown when updating this FilteredList; removing the FilteredList prevents this exception from happening.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Select a non-leaf TreeItem that is a child of the root node in the TreeTableView.
2. Rapidly expand/collapse the selected TreeItem by clicking quickly on the expand icon.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The FilteredList should be properly updated with the selected items in the TreeTableView.
ACTUAL -
An ArrayIndexOutOfBoundsException is thrown when expanding/collapsing a selected TreeItem.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Change: { [TreeItem [ value: Node 1-1 ]] added at 0 }
Change: { [TreeItem [ value: Node 1-1 ]] added at 0 }
Change: { [TreeItem [ value: Node 1-1 ]] added at 0 }
Change: { [TreeItem [ value: Node 1-1 ]] added at 0 }
Change: { [TreeItem [ value: Node 1-1 ]] added at 0 }
Exception in thread "JavaFX Application Thread" java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at javafx.collections.transformation.FilteredList.addRemove(FilteredList.java:269)
        at javafx.collections.transformation.FilteredList.sourceChanged(FilteredList.java:144)
        at javafx.collections.transformation.TransformationList.lambda$getListener$15(TransformationList.java:106)
        at javafx.collections.WeakListChangeListener.onChanged(WeakListChangeListener.java:88)
        at com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(ListListenerHelper.java:164)
        at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
        at com.sun.javafx.scene.control.ReadOnlyUnbackedObservableList.callObservers(ReadOnlyUnbackedObservableList.java:75)
        at javafx.scene.control.TreeTableView$TreeTableViewArrayListSelectionModel.handleSelectedCellsListChangeEvent(TreeTableView.java:3312)
        at javafx.scene.control.TreeTableView$TreeTableViewArrayListSelectionModel.lambda$new$125(TreeTableView.java:2313)
        at com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(ListListenerHelper.java:164)
        at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
        at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
        at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
        at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
        at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
        at javafx.collections.transformation.SortedList.sourceChanged(SortedList.java:108)
        at javafx.collections.transformation.TransformationList.lambda$getListener$15(TransformationList.java:106)
        at javafx.collections.WeakListChangeListener.onChanged(WeakListChangeListener.java:88)
        at com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(ListListenerHelper.java:164)
        at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
        at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
        at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
        at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
        at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
        at javafx.collections.ModifiableObservableListBase.addAll(ModifiableObservableListBase.java:102)
        at com.sun.javafx.scene.control.SelectedCellsMap.addAll(SelectedCellsMap.java:146)
        at javafx.scene.control.TreeTableView$TreeTableViewArrayListSelectionModel.selectIndices(TreeTableView.java:2832)
        at javafx.scene.control.MultipleSelectionModel.selectRange(MultipleSelectionModel.java:176)
        at TreeTableViewSample.selectChildrenOfRows(TreeTableViewSample.java:96)
        at TreeTableViewSample.lambda$start$1(TreeTableViewSample.java:64)
        at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:361)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
        at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:176)
        at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:142)
        at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:113)
        at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:147)
        at javafx.scene.control.TreeTableView.setExpandedItemCount(TreeTableView.java:1088)
        at javafx.scene.control.TreeTableView.updateExpandedItemCount(TreeTableView.java:1861)
        at javafx.scene.control.TreeTableView.getExpandedItemCount(TreeTableView.java:1092)
        at com.sun.javafx.scene.control.behavior.TreeTableCellBehavior.getItemCount(TreeTableCellBehavior.java:72)
        at com.sun.javafx.scene.control.behavior.TableCellBehaviorBase.doSelect(TableCellBehaviorBase.java:110)
        at com.sun.javafx.scene.control.behavior.CellBehaviorBase.mouseReleased(CellBehaviorBase.java:159)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
        at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
        at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
        at javafx.event.Event.fireEvent(Event.java:198)
        at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
        at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
        at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
        at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
        at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
        at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
        at com.sun.glass.ui.View.notifyMouse(View.java:937)
        at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
        at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
        at java.lang.Thread.run(Thread.java:745)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.*;

import javafx.application.Application;
import javafx.collections.*;
import javafx.collections.transformation.*;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.control.TreeTableColumn.CellDataFeatures;
import javafx.stage.Stage;

public class TreeTableViewSample extends Application {

    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage stage) {
        final TreeItem<String> childNode1 = new TreeItem<>("Child Node 1");
        childNode1.getChildren().addAll(
            new TreeItem<String>("Node 1-1"),
            new TreeItem<String>("Node 1-2")
        );

        final TreeItem<String> root = new TreeItem<>("Root node");
        root.setExpanded(true);
        root.getChildren().add(childNode1);

        TreeTableColumn<String,String> column = new TreeTableColumn<>("Column");
        column.setPrefWidth(190);
        column.setCellValueFactory((CellDataFeatures<String, String> p) ->
            new ReadOnlyStringWrapper(p.getValue().getValue()));

        final TreeTableView<String> treeTableView = new TreeTableView<>(root);
        treeTableView.getColumns().add(column);
        treeTableView.setPrefWidth(200);
        treeTableView.setShowRoot(true);
        treeTableView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);

        // Select all children of expanded node.
        treeTableView.expandedItemCountProperty().addListener((observable, oldCount, newCount) -> {
            if (newCount.intValue() > oldCount.intValue()) {
                selectChildrenOfRows(treeTableView, treeTableView.getSelectionModel().getSelectedIndices());
            }
        });

        filteredList = treeTableView.getSelectionModel().getSelectedItems().filtered(Objects::nonNull);
        filteredList.addListener((ListChangeListener.Change<? extends TreeItem<String>> change) -> {
            System.out.printf("Change: %s\n", change);
        });

        final Scene scene = new Scene(new Group(), 200, 400);
        Group sceneRoot = (Group)scene.getRoot();
        sceneRoot.getChildren().add(treeTableView);

        stage.setTitle("Tree Table View Samples");
        stage.setScene(scene);
        stage.show();
    }

    private FilteredList<TreeItem<String>> filteredList;

    private void selectChildrenOfRows(TreeTableView<String> table, Collection<Integer> selectedRows) {
        for (int index: selectedRows) {
            TreeItem<String> item = table.getTreeItem(index);

            if (item != null && item.isExpanded() && !item.getChildren().isEmpty()) {
                int startIndex = index + 1;
                int maxCount = startIndex + item.getChildren().size();

                table.getSelectionModel().selectRange(startIndex, maxCount);
            }
        }
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Don't create a FilteredList from the selectedItems property of a TreeTableView.