I have strange error that happens after couple of hours. Some instances
start to respond on any request with status code 500. Log file
unicorn.stderr.log gets populated with this error:
app error: undefined method `each' for nil:NilClass (NoMethodError)
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/utils.rb:267:in
`initialize'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/utils.rb:261:in
`new'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/utils.rb:261:in
`new'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/chunked.rb:16:in
`call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:106:in
`call'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails/rack/static.rb:31:in
`call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/urlmap.rb:47:in
`block in call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/urlmap.rb:41:in
`each'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.2/lib/rack/urlmap.rb:41:in
`call'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:528:in
`process_client'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:600:in
`worker_loop'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:485:in
`spawn_missing_workers'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:496:in
`maintain_worker_count'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:270:in
`join'
/usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.1.1/bin/unicorn_rails:209:in
`<top (required)>'
/usr/local/bin/unicorn_rails:19:in `load'
/usr/local/bin/unicorn_rails:19:in `<main>'
Application is running on rails 2.3.14/ruby 1.9.2p290 and maybe it has
something to do with plugin being used, that is template_streaming
(https://github.com/oggy/template_streaming)
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