Raised when Rack::ApplicationSpawner, Railz::ApplicationSpawner, Railz::FrameworkSpawner or SpawnManager was unable to spawn an application, because the application either threw an exception or called exit.

If the application called exit, then child_exception is an instance of SystemExit.

Methods
Attributes
[RW] app_type The application type, e.g. "rails" or "rack".
[RW] stderr Any messages printed to stderr before the failure. May be nil.
Public Class methods
new(message, child_exception = nil, app_type = "rails", stderr = nil)
    # File lib/phusion_passenger/exceptions.rb, line 61
61:         def initialize(message, child_exception = nil, app_type = "rails", stderr = nil)
62:                 super(message, child_exception)
63:                 @app_type = app_type
64:                 @stderr = stderr
65:         end