Unhandled event loop exception

Lot of people wonder what the famous Unhandled event loop exception is !!!???

This is no more than an uncaught Exception occurring with in the Eclipse workbench Main thread (or the UI thread, it’s the same).

When writing Eclipse plugins we often write code that will be executed within the Main thread. For example when contributing a new hello world button within the main Eclipse toolbar we must implement a given interface with a run() method.

In this method we write the code responsible to display to the user the “Hello world message”. If this code throws a new Exception without catching it then the Exception is forwarded to the caller. This caller is the Eclipse code but not our !!!!

In this Eclipse code the Exception is forwarded up to the Workbench.runEventLoop(IExceptionHandler, Display) method that catch it and log a new Unhandled event loop exception Error message. This message also contains our source Exception displayed as Reason :

When you see an Unhandled event loop exception , don’t worry and just look for the reason, it’s often a silly mistake :o)

Possibly related posts: (automatically generated)

This entry was posted on February 21, 2008 at 2:50 pm and is filed under Eclipse Misc. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “Unhandled event loop exception”

  1. Stuart Says:
    June 27, 2008 at 10:24 pm

    This is happening for me constantly and I’m not a plugin developer

    It just started happening today and I can’t get it to stop it’s making the PHPEclipse UI unusable!!

    Any ideas anyone? I’ve disabled the php project builder and the validation but no help

    It happening in Processing Dirty Regions whatever that is!

    Thanks

  2. Stuart Says:
    June 27, 2008 at 10:25 pm

    Here’s the error log:

    Unhandled event loop exception
    java.lang.StackOverflowError

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