Resque工作者中间歇性的“Moped：：Protocol：：命令失败，错误为零”错误

Question

我使用的是Rails 3.2、Mongoid 3.1.7、摩托车1.5.3和Resque 1.24.1

我反复地在Resque工作人员中得到“Moped：：Protocol：：命令失败而没有错误”1错误。

这个问题和这一个在摩托回购中让我认为这可能是因为Resque分叉，但它们都是关于比我使用的旧版本的摩托，而且我一直无法找到任何特定的信息来配置Resque以便与Mongoid很好地工作。

如何解决Resque员工中的错误？

1完全错误：Exception: Moped::Errors::OperationFailure Error: The operation: #<Moped::Protocol::Command @length=58 @request_id=3 @response_to=0 @op_code=2004 @flags=[] @full_collection_name="admin.$cmd" @skip=0 @limit=-1 @selector={:ismaster=>1} @fields=nil> failed with error nil /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:99:in `block in command' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:600:in `[]' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:600:in `block (3 levels) in flush' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:599:in `map' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:599:in `block (2 levels) in flush' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:150:in `ensure_connected' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:595:in `block in flush' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:610:in `logging' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:594:in `flush' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:583:in `process' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:92:in `command' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/node.rb:409:in `refresh' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cluster.rb:171:in `block in refresh' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cluster.rb:185:in `each' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cluster.rb:185:in `refresh' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cluster.rb:135:in `nodes' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cluster.rb:206:in `with_primary' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/session/context.rb:108:in `with_node' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cursor.rb:137:in `load_docs' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/cursor.rb:25:in `each' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/query.rb:76:in `each' /shared/bundle/ruby/2.2.0/gems/moped-1.5.3/lib/moped/query.rb:76:in `each' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/contextual/mongo.rb:423:in `entries' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/contextual/mongo.rb:423:in `check_existence' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/contextual/mongo.rb:146:in `exists?' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/contextual.rb:19:in `exists?' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/validations/uniqueness.rb:273:in `validate_root' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/validations/uniqueness.rb:52:in `block in validate_each' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/validations/queryable.rb:23:in `with_query' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/validations/uniqueness.rb:46:in `validate_each' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validator.rb:153:in `block in validate' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validator.rb:150:in `each' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validator.rb:150:in `validate' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:310:in `_callback_before_265' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:418:in `_run__123721054543109017__validate__3207805434451540367__callbacks' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:405:in `__run_callback' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:385:in `_run_validate_callbacks' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:81:in `run_callbacks' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/callbacks.rb:130:in `run_callbacks' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validations.rb:228:in `run_validations!' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validations/callbacks.rb:53:in `block in run_validations!' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:403:in `_run__123721054543109017__validation__3207805434451540367__callbacks' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:405:in `__run_callback' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:385:in `_run_validation_callbacks' /shared/bundle/ruby/2.2.0/gems/activesupport-3.2.22/lib/active_support/callbacks.rb:81:in `run_callbacks' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/callbacks.rb:130:in `run_callbacks' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validations/callbacks.rb:53:in `run_validations!' /shared/bundle/ruby/2.2.0/gems/activemodel-3.2.22/lib/active_model/validations.rb:195:in `valid?' /shared/bundle/ruby/2.2.0/gems/mongoid-3.1.7/lib/mongoid/validations.rb:84:in `valid?' /releases/20160315172839/app/performers/garmin_receive_push.rb:11:in `block in perform' /releases/20160315172839/app/performers/garmin_receive_push.rb:9:in `map' /releases/20160315172839/app/performers/garmin_receive_push.rb:9:in `perform'

Answer 1

这似乎奏效了。昨天从我的Resque员工的30+错误变成了过去18个小时内的0。

添加到我的Resque配置中：

Resque.before_fork do
    ::Mongoid.default_session.disconnect
end

我对这里到底出了什么问题没有一个非常连贯的描述。Resque员工叉出一个子流程，然后子流程处理作业，所以我目前的操作假设是，这类似于与Unicorn和客运分叉相关的问题。