JDK-8267572 : java.awt.Desktop.open hangs on Linux when called from FX application thread
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 8,15,16,17
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • OS: linux
  • Submitted: 2021-05-22
  • Updated: 2021-06-05
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Other
tbdUnresolved
Related Reports
Duplicate :  
JDK-6563223 - problem when using Desktop.getDesktop().browse(URI)
Relates :  
JDK-8210199 - [linux / macOS] fileChooser can't handle emojis
Relates :  
JDK-8123117 - desktop.open() method of Desktop class doesn't work on Linux
Description
This is a follow-on bug that I discovered while testing the fix for JDK-8210199.

To reproduce, run the attached test program on Linux. It will hang with a possible deadlock. The FX application thread, which calls Desktop.open, is stuck in "sun.awt.X11.XDesktopPeer.gnome_url_show".

The complete thread stack dump is attached.

It's quite possible that the FX glass GTK code is doing something to trigger this.

This runs fine on macOS and Windows.

Workaround: wrap the call to Desktop.open in SwingUtilities.invokeLater().
Comments
I recall that the same issue(JDK-8123117) was filed several years ago, it was closed as not an issue by me. Let this be open to revisit it later, but the main idea is still the same: don't do that on FX Application thread.
04-06-2021