Global Error Classes
Airbrake now allows you to group errors as a "global" error which allows you to group errors that may happen across your application under one error class. For example, if your MySQL server goes down, in a Rails applications the errors will appear from many different controllers and models and clutter your Airbrake dashboard up. By setting the error class for these errors as a global class, the errors will be grouped together as they are delivered to our service.
To enable global error classes for a project, first go to the edit project page:

Next, fill in the errors you would like grouped together. You can use spaces, newlines, or commas to separate error classes:

For this example we've submitted two errors under the
RuntimeError class. From the dashboard we'll only see
one entry for that group:

As new errors come in, you'll see them under the same group instead of separate:

