issues running sinatra 1.4 with rack 1.6

[kares]

Internal Server Error (500)
Request Method:     GET
Request URL:    http://localhost:8080/jruby_hello_world/

Server handler (trinidad,puma,reel,HTTP,webrick) not found. from C:/apache/tomcat-8.0.21/webapps/jruby_hello_world/WEB-INF/gems/gems/sinatra-1.4.6/lib/sinatra/base.rb:1781:in `detect_rack_handler' 
from C:/apache/tomcat-8.0.21/webapps/jruby_hello_world/WEB-INF/gems/gems/sinatra-1.4.6/lib/sinatra/base.rb:1437:in `run!' 
from C:\apache\tomcat-8.0.21\webapps\jruby_hello_world\WEB-INF\config.ru:7:in `(root)' 
from org/jruby/RubyBasicObject.java:1594:in `instance_eval' 
from C:/apache/tomcat-8.0.21/webapps/jruby_hello_world/WEB-INF/gems/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize' 
from C:\apache\tomcat-8.0.21\webapps\jruby_hello_world\WEB-INF\config.ru:1:in `(root)'

You're seeing this error because you use JRuby::Rack::ErrorApp::ShowStatus.

sample app at: https://github.com/predatorian3/jruby_hello_world

[FilBot3]

FilBot3/jruby_hello_world#1

[kares]

turns out the issue is not related to rack 1.6 and is present with 1.5 ... simply the config.ru as is won't work since (as the failure suggests) it does rack handler auto-detection, switch to using run MySinatra::App