What does Heroku mean by app[web.1]?

Posted by Colonel Panic on Stack Overflow See other posts from Stack Overflow or by Colonel Panic
Published on 2012-10-08T21:35:18Z Indexed on 2012/10/08 21:36 UTC
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heroku

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rack

What does Heroku mean by app[web.1] and by <main>:48?

I have a crash that happens only on Heroku and not on my computer, I'm trying to identify the precise line causing the crash. These are the logs

heroku[web.1]:?[0m Starting process with command `bundle exec rackup config.ru -s thin -p 40103`
app[web.1]:?[0m <main>:48:in `method_missing': wrong number of arguments (1 for 2) (ArgumentError)
app[web.1]:?[0m  from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:265:in `start'
...
heroku[web.1]:?[0m Process exited with status 1
heroku[web.1]:?[0m State changed from starting to crashed

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