Created
October 5, 2011 08:20
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Demonstrate queue unsubscribe bug
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| ruby demo-amqp-one-message-subscribers.rb | |
| single-message consumer listening to rapid producer | |
| > PUT msg 0 | |
| > PUT msg 1 | |
| > PUT msg 2 | |
| > PUT msg 3 | |
| < GET msg 2 [waited 0.05s][18.95 reqs/sec] | |
| /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/consumer.rb:246:in `block in <class:Consumer>': undefined method `handle_delivery' for nil:NilClass (NoMethodError) | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `receive_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:514:in `receive_frame' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapters/event_machine.rb:326:in `receive_data' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run' | |
| from demo-amqp-one-message-subscribers.rb:47:in `<main>' |
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| require 'bundler' | |
| Bundler.setup | |
| require 'amqp' | |
| puts "single-message consumer listening to rapid producer" | |
| QUEUE_NAME = 'test.rapid-queue-unsubscription' | |
| PRODUCE_RATE = 1.0/10 | |
| CONSUME_RATE = 1.0/9 | |
| def start_producer channel | |
| exchange = AMQP::Exchange.new(channel, :direct, "") | |
| n = 0 | |
| EM::PeriodicTimer.new(PRODUCE_RATE) do | |
| 2.times do | |
| message = "msg #{n}" | |
| exchange.publish(message, | |
| :immediate => true, # IMPORTANT, messages are dropped if nobody listening now | |
| :routing_key => QUEUE_NAME) | |
| puts "> PUT #{message}" | |
| n += 1 | |
| end | |
| end | |
| end | |
| def start_consumer channel | |
| EM::PeriodicTimer.new(CONSUME_RATE) do | |
| started = Time.now | |
| tick_queue = channel.queue(QUEUE_NAME) | |
| consumer = AMQP::Consumer.new(channel, tick_queue) | |
| consumer.on_delivery do |metadata, message| | |
| took = Time.now - started | |
| puts "< GET #{message} [waited #{took.round(2)}s][#{(1.0/took).round(2)} reqs/sec]" | |
| metadata.ack | |
| consumer.cancel | |
| end | |
| consumer.consume | |
| end | |
| end | |
| EM.run do | |
| EM.set_quantum(50) | |
| AMQP::Channel.new do |channel| | |
| start_producer channel | |
| end | |
| AMQP::Channel.new do |channel| | |
| start_consumer channel | |
| end | |
| end |
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| > PUT msg 0 | |
| < GET msg 0 [waited 0.0s][511.25 reqs/sec] | |
| > PUT msg 1 | |
| > PUT msg 2 | |
| < GET msg 1 [waited 0.0s][439.56 reqs/sec] | |
| /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/consumer.rb:246:in `block in <class:Consumer>': undefined method `handle_delivery' for nil:NilClass (NoMethodError) | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `receive_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:514:in `receive_frame' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapters/event_machine.rb:326:in `receive_data' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run' | |
| from demo-amqp-one-message-subscribers.rb:57:in `<main>' |
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| /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:244:in `send_frame': Trying to send frame through a closed connection. Frame is #<AMQ::Protocol::MethodFrame:0x007fa6d29a35f0 @payload="\x00<\x00(\x00\x00\x00\x1Ftest.rapid-queue-unsubscription\x02", @channel=1> (AMQ::Client::ConnectionClosedError) | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `block (2 levels) in send_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `each' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `block in send_frameset' | |
| from <internal:prelude>:10:in `synchronize' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/channel.rb:100:in `synchronize' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:260:in `send_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/exchange.rb:152:in `publish' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/exchange.rb:482:in `block in publish' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/deferrable.rb:47:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/deferrable.rb:47:in `callback' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/channel.rb:905:in `once_open' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/exchange.rb:479:in `publish' | |
| from demo-amqp-one-message-subscribers.rb:16:in `block in start_producer' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/timers.rb:51:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/timers.rb:51:in `fire' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run' | |
| from demo-amqp-one-message-subscribers.rb:45:in `<main>' |
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| > PUT msg 0 | |
| < GET msg 0 [waited 0.0s][511.25 reqs/sec] | |
| > PUT msg 1 | |
| > PUT msg 2 | |
| < GET msg 1 [waited 0.0s][439.56 reqs/sec] | |
| /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/consumer.rb:246:in `block in <class:Consumer>': undefined method `handle_delivery' for nil:NilClass (NoMethodError) | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:535:in `receive_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:514:in `receive_frame' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapters/event_machine.rb:326:in `receive_data' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run' | |
| from demo-amqp-one-message-subscribers.rb:57:in `<main>' |
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| /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:244:in `send_frame': Trying to send frame through a closed connection. Frame is #<AMQ::Protocol::MethodFrame:0x007fa6d29a35f0 @payload="\x00<\x00(\x00\x00\x00\x1Ftest.rapid-queue-unsubscription\x02", @channel=1> (AMQ::Client::ConnectionClosedError) | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `block (2 levels) in send_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `each' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:261:in `block in send_frameset' | |
| from <internal:prelude>:10:in `synchronize' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/channel.rb:100:in `synchronize' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/adapter.rb:260:in `send_frameset' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amq-client-0.8.3/lib/amq/client/async/exchange.rb:152:in `publish' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/exchange.rb:482:in `block in publish' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/deferrable.rb:47:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/deferrable.rb:47:in `callback' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/channel.rb:905:in `once_open' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/amqp-0.8.0/lib/amqp/exchange.rb:479:in `publish' | |
| from demo-amqp-one-message-subscribers.rb:16:in `block in start_producer' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/timers.rb:51:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/em/timers.rb:51:in `fire' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `call' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine' | |
| from /Users/rud/.rvm/gems/ruby-1.9.2-head@bundler/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run' | |
| from demo-amqp-one-message-subscribers.rb:45:in `<main>' |
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| source 'http://rubygems.org' | |
| gem 'amqp' | |
| gem 'eventmachine' |
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| GEM | |
| remote: http://rubygems.org/ | |
| specs: | |
| amq-client (0.8.3) | |
| amq-protocol (>= 0.8.0) | |
| eventmachine | |
| amq-protocol (0.8.1) | |
| amqp (0.8.0) | |
| amq-client (~> 0.8.3) | |
| amq-protocol (~> 0.8.0) | |
| eventmachine | |
| eventmachine (0.12.10) | |
| PLATFORMS | |
| ruby | |
| DEPENDENCIES | |
| amqp | |
| eventmachine |
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| OS X 10.7.1 | |
| ruby 1.9.2p312 (2011-08-11 revision 32926) [x86_64-darwin11.1.0] | |
| RabbitMQ 2.6.1 |
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