Eclipse Bug: Unhandled event loop exception No more handles

I had the same problem, turned out that TeamViewer was causing this.

In your TeamViewer go to:

Extras → Options → Advanced → QuickConnect button, configure it and disable the show QuickConnect button.

As suggested by Nineroad Installing WindowBuilder as the default editor for files with a *.java extention fixed this issue for me.

In Eclipse, navigate to Help > Install New Software

Add http://archive.eclipse.org/windowbuilder/WB/release/R201309271200/4.3 to the "Work with" path, select all components suggested, and install WindowBuilder.

Once complete, Eclipse will request restart. Once restarted, within Eclipse navigate to Window > Preferences. In The Preferences dialogue-box navigate to General > Editor > File Associations. Under "File Associations" list, be sure to select *.java file types. The bottom window (labeled "Associated Editors") should have WindowBuilder as an option. Select WindowBuilder and click "Default" to the right, to set WindowBuilder as your default *.java file editor.

This fixed the SWT error for me.

Note: Eclipse Version: Kepler Service Release 2 Windows 7 64-bit

There is a workaround: Change the Java editor to WindowBuilder.

Eclipse → Windows → Preferences → File Associations →, choose WindowBuilder Editor as Java default editor.