Description Daria Huber 2010-11-16 09:38:16 EST

Build Identifier: 3.5.2

I have a table view which is periodically refreshed by a timer task:

UICallBack.activate("refresher");
TimerTask timerTask = new TimerTask() {
            List<Object> result = null;

            public void run() {                    
                  result = refreshInputFromDb();   
                  table.getTableViewer().getControl().getDisplay().syncExec(
                        new Runnable() {
                            public void run() {
                                updateTable(result);
                            }
                        });
                    }
                }
            }

Timer timer = new Timer();
timer.schedule(timerTask, 20000, 20000);

By doubleclicking on a table entry i stop the timer task and open an editor for editing the selected object.
public void stopRefreshTimer() {
            timerTask.cancel();
            timer.cancel();
            timer = null;
            timerTask = null;
            UICallBack.deactivate("refresher");
}

When opening the editor, a ContainerCheckedTreeViewer is initialized and filled with data. 
Sometimes is an invalid thread exception throwed. 


I think StructuredViewer is not thread safe. Is it a bug or not?

Reproducible: Always