When I install the logstash-output-http version 5.2.5 plugin (/usr/share/logstash/bin/logstash-plugin install logstash-output-http) the logstash-mixin-http_client dependency is downloaded which updates Sinatra from the version 2.1.0 to 2.2.0.
Logstash with this library crashes with this error:
An unexpected error occurred! {: error => # <ArgumentError: wrong number of arguments (given 3, expected 1..2)>
Analyzing sinatra 2.2.0 ("/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/sinatra-2.2.0/lib/sinatra/base.rb) line 1537 it can be seen that the ** kwargs parameter in addiction compared to version 2.1.0
def new (* args, ** kwargs, & bk)
instance = new! (* args, ** kwargs, & bk)
Wrapper.new (build (instance) .to_app, instance)
For the moment I managed to solve the problem by installing the http plugin with the --preserve option which DOES NOT automatically update the logstash-mixin-http_client dependency and therefore keeps Sinatra at version 2.1.0
/usr/share/logstash/bin/logstash-plugin install --preserve logstash-output-http
But it is not correct for a plugin update to break logstash