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My API endpoints have been 503-ing w/my falcon served rails application. Once identified (my exception handling didn't catch this, and I wasn't monitoring for 5XX anomalies 😿) I was able to reproduce locally.
web | 46.1s warn: Async::Task: Reading HTTP/1.1 requests for Async::HTTP::Protocol::HTTP1::Server. [oid=0x15c10] [ec=0x2ed8] [pid=78930] [2025-05-08 13:38:20 -0600]
web | | Task may have ended with unhandled exception.
web | | NoMethodError: undefined method 'split' for an instance of Integer (NoMethodError)
web | |
web | | super(value.split(COMMA))
web | | ^^^^^^
web | | → /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/header/split.rb:21 in 'Protocol::HTTP::Header::Split#initialize'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:332 in 'Array.new'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:332 in 'Protocol::HTTP::Headers#merge_into'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:353 in 'block in Protocol::HTTP::Headers#to_h'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:352 in 'Array#each'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:352 in 'Enumerable#inject'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:352 in 'Protocol::HTTP::Headers#to_h'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/headers.rb:345 in 'Protocol::HTTP::Headers#[]'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/content_encoding.rb:43 in 'Protocol::HTTP::ContentEncoding#call'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/protocol-http-0.49.0/lib/protocol/http/middleware.rb:53 in 'Protocol::HTTP::Middleware#call'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/falcon-0.51.1/lib/falcon/server.rb:66 in 'Falcon::Server#call'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/async-http-0.88.0/lib/async/http/server.rb:58 in 'block in Async::HTTP::Server#accept'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/async-http-0.88.0/lib/async/http/protocol/http1/server.rb:71 in 'Async::HTTP::Protocol::HTTP1::Server#each'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/async-http-0.88.0/lib/async/http/server.rb:50 in 'Async::HTTP::Server#accept'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/falcon-0.51.1/lib/falcon/server.rb:57 in 'Falcon::Server#accept'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/io-endpoint-0.15.2/lib/io/endpoint/wrapper.rb:216 in 'block (2 levels) in IO::Endpoint::Wrapper#accept'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/async-2.23.1/lib/async/task.rb:200 in 'block in Async::Task#run'
web | | /Users/dwestendorf/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/async-2.23.1/lib/async/task.rb:438 in 'block in Async::Task#schedule'The application code causing this is
headers["X-RateLimit-Limit"] = api_limit.maxwhere the value is an integer.
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