Heroku にデプロイされた私の Rails 3.1 プロジェクトには、データベース内のレコードに基づいて数十万の小さな PNG を生成し、一度に 1 ファイルずつfogを使用して結果を S3 にアップロードする rake タスクがあります。（herokuを使用する前は、タスクはファイルをローカルに保存し、すべて正常に機能していました。）を使用してタスクを実行するheroku run:detachedと、しばらく実行され、一連のファイルがアップロードされますが、最終的にはConnection reset by peer (Errno::ECONNRESET). これについて奇妙なのは、次のように例外をキャッチして再試行するようにスクリプトを変更したことです。
file_exists = false
retry_count = 10
begin
file_exists = directory.files.head(filekey)
rescue Errno::ECONNRESET => e
if retry_count > 0 then
logger.warning("Connection reset: #{e.inspect}")
retry_count -= 1
sleep(1)
retry
else
raise
end
end
スタック トレースによるとfile_exists = directory.files.head(filekey)、例外につながる私のコードの行なので、Ruby の例外処理について何かが欠けているように感じます。これが私の begin/rescue ブロックの問題なのか、fog がネットワーク エラーを処理する方法なのか、それとも何なのか、100% 確信が持てないので、私が間違っていることを知りたいです。
完全なスタック トレースは次のとおりです。
Nov 07 12:08:01 ... app/run.1: Connection reset by peer (Errno::ECONNRESET)
Nov 07 12:08:01 ... app/run.1: /app/vendor/ruby-1.8.7/lib/ruby/1.8/openssl/buffering.rb:36:in `sysread'
Nov 07 12:08:01 ... app/run.1: /app/vendor/ruby-1.8.7/lib/ruby/1.8/openssl/buffering.rb:36:in `fill_rbuff'
Nov 07 12:08:01 ... app/run.1: /app/vendor/ruby-1.8.7/lib/ruby/1.8/openssl/buffering.rb:68:in `read'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/socket.rb:121:in `read'
Nov 07 12:08:01 ... app/run.1: /app/vendor/ruby-1.8.7/lib/ruby/1.8/timeout.rb:67:in `timeout'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/socket.rb:120:in `read'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/ssl_socket.rb:79:in `read'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/response.rb:21:in `parse'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/connection.rb:275:in `request_kernel'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/excon-0.16.7/lib/excon/connection.rb:103:in `request'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/fog-1.6.0/lib/fog/core/connection.rb:20:in `request'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/fog-1.6.0/lib/fog/aws/storage.rb:392:in `request'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/fog-1.6.0/lib/fog/aws/requests/storage/head_object.rb:53:in `head_object'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/fog-1.6.0/lib/fog/aws/models/storage/files.rb:98:in `head'
Nov 07 12:08:01 ... app/run.1: /app/lib/tasks/assets.rake:45
Nov 07 12:08:01 ... app/run.1: /app/lib/tasks/assets.rake:37:in `each'
Nov 07 12:08:01 ... app/run.1: /app/lib/tasks/assets.rake:37
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/activerecord-3.1.8/lib/active_record/relation/batches.rb:21:in `find_each'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/activerecord-3.1.8/lib/active_record/relation/batches.rb:21:in `each'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/activerecord-3.1.8/lib/active_record/relation/batches.rb:21:in `find_each'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/activerecord-3.1.8/lib/active_record/relation/batches.rb:69:in `find_in_batches'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/activerecord-3.1.8/lib/active_record/relation/batches.rb:20:in `find_each'
Nov 07 12:08:01 ... app/run.1: /app/lib/tasks/assets.rake:35
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `execute'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `invoke_with_call_chain'
Nov 07 12:08:01 ... app/run.1: /app/vendor/ruby-1.8.7/lib/ruby/1.8/monitor.rb:242:in `synchronize'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `run'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/gems/rake-0.9.2.2/bin/rake:33
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/bin/rake:23:in `load'
Nov 07 12:08:01 ... app/run.1: /app/vendor/bundle/ruby/1.8/bin/rake:23
Nov 07 12:08:01 ... app/run.1: Tasks: TOP => ...:make_outlines
Nov 07 12:08:02 ... heroku/run.1: Process exited with status 1
Nov 07 12:08:02 ... heroku/run.1: State changed from up to complete