when trying to run `bin/logstash web` the following error is thrown:
it seems that rack and sinatra gems are missing from the build. they were removed in commit bc2e9b677bdee5faf72d1a18c4012602a94c76fc
If kibana is no longer distributed with logstash then it will be wise to remove the `web` option as well.
to work around the issue and get kibana to work using logstash web:
env GEM_HOME=vendor/bundle/jruby/1.9 GEM_PATH="" java -jar vendor/jar/jruby-complete-1.7.10.jar -S gem install sinatra rack