IOError not opened for reading

[cschramm]

Suddenly I get an IOError in my development machine for every request.

It occures in activesupport-4.0.0.beta1/lib/active_support/json/encoding.rb, line 256:

254 module Enumerable
255   def as_json(options = nil) #:nodoc:
256     to_a.as_json(options)
257   end
258 end

which is triggered from meta_request-0.2.3/lib/meta_request/middlewares/app_request_handler.rb, line 21:

Storage.new(app_request.id).write(app_request.events.to_json) unless app_request.events.empty?

It seems to be the exact same issue as rollbar/rollbar-gem#32 and already appeared with meta_request in markevans/dragonfly#18.

[elfassy]

+1

[shanesveller]

While #52 says that 0.2.5 should improve Rails 4 pre-release support, I am still seeing the above issue with this newer meta_request version and Rails 4.0 RC1. Perhaps one of my other dependencies is causing the conflict instead.

[dejan]

Can you please paste your Gemfile. Thanks.

[shanesveller]

@dejan Here's a gist: https://gist.github.com/shanesveller/80a010c63b58c3f2bc7f

This is ultra low-priority for me, I'm only a hobby programmer experimenting with bumping a project app to Rails 4. I appreciate you taking the time to look at it whenever you like.

[zzemla]

+1

[zzemla]

Not sure if this will help, but quick research into this error shows that app_request.events contains 'process_action.action_controller' event which references (via payload[:request]) the current Rack::Request. Calling to_json on Rack::Request object fails for me, probably because it contains references to IO objects (like STDERR). Tested on ruby 2.0, Rails 4 RC1.

[dejan]

@shanesveller thank you very much for the Gemfile. It helped me recreate the issue and fix it. The newrelic_rpm gem set the payload[:request] that contained some closed IO as @zzemia discovered.

[dejan]

Fix is in meta_request 0.2.6.

[cschramm]

Works for me. Thanks!