Hello, Holger. Thank you for the report.
The reason is that the ThreadPool is creating a thread in a ThreadGroup which is not associated with any AppContext. I suppose that the fix for JDK-8019274 would also resolve this issue, but this should be checked. I’ll write back as I have a chance to check this. With best regards. Petr. 20 февр. 2014 г., в 11:01 после полудня, Holger Brands <[email protected]> написал(а): > Hi there, > > this is meant as a comment to issue > https://bugs.openjdk.java.net/browse/JDK-8019274 > which describes a problem of RMI threads calling out to java.awt.EventQueue > in a java webstart app. > > I think it's a more general problem, not only related to RMI threads. Another > scenario is the following: > When you open a JFileChooser in a Java Webstart application, change the > view to "Details" such that column headers appear and then click on the name > column to sort the shown entries, I get the > following exception on Windows 7, both with Java 7u45 and Java 7u51: > > java.lang.NullPointerException > at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source) > at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source) > at sun.awt.SunToolkit.getSystemEventQueueImpl(Unknown Source) > at java.awt.Toolkit.getEventQueue(Unknown Source) > at java.awt.EventQueue.isDispatchThread(Unknown Source) > at javax.swing.SwingUtilities.isEventDispatchThread(Unknown Source) > at javax.swing.JComponent.revalidate(Unknown Source) > at javax.swing.JTable.resizeAndRepaint(Unknown Source) > at javax.swing.JTable.sortedTableChanged(Unknown Source) > at javax.swing.JTable.sorterChanged(Unknown Source) > at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source) > at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source) > at javax.swing.DefaultRowSorter.sort(Unknown Source) > at sun.swing.FilePane$DetailsTableRowSorter.access$1601(Unknown Source) > at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source) > at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source) > at java.util.concurrent.FutureTask.run(Unknown Source) > at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Unknown > Source) > at java.lang.Thread.run(Unknown Source) > > It's a similiar stacktrace but not quite the same. > But I bet it's the same cause. > > Please ensure when fixing JDK-8019274 that this variant is also fixed. > Also, I would be interested in a workaround for this FileChooser sorting > issue. > > Thanks, > Holger
