How to solve this error: riak_client: RuntimeError: The NetH

Question

我是Riak的新手，这是我在irb中尝试的ruby代码:

irb(main):002:0> c = Riak::Client.new
=> #<Riak::Client http://127.0.0.1:8098>
irb(main):003:0> obj = c['videos']['first']
RuntimeError: The NetHTTP HTTP backend cannot be used. Please check its requirements.
    from /usr/local/lib/ruby/gems/1.9.1/gems/riak-client-0.9.8/lib/riak/client.rb:247:in `http'
    from /usr/local/lib/ruby/gems/1.9.1/gems/riak-client-0.9.8/lib/riak/client.rb:276:in `backend'
    from /usr/local/lib/ruby/gems/1.9.1/gems/riak-client-0.9.8/lib/riak/bucket.rb:102:in `get'
    from (irb):3
    from /usr/local/bin/irb:12:in `<main>'

我怎样才能解决这个问题?

谢谢，节日快乐!

Answer 1

我遇到了这个错误消息，因为我指定的端口号与Riak使用的端口号不同:

client  = Riak::Client.new(:port => 8091, :http_backend => :Excon)

也许Riak在不同的端口上运行，或者根本没有运行。为了解决这个问题，我只是删除了端口号:

client = Riak::Client.new(:http_backend => :Excon)

Answer 2

错误消息清楚地表明它缺少需求。您应该根据文档安装它们，或者只是尝试另一个后端。