我正在尝试使用PubNub Ruby SDK 4.0.25运行一个简单的Ruby代码，但是在运行ruby subscriber.rb时我收到的日志错误如下所示：
# Logfile created on 2017-10-14 01:09:02 +0200 by logger.rb/56815
D, [2017-10-14T01:09:02.580516 #1990] DEBUG -- Pubnub::Telementry: Initialized Telemetry
D, [2017-10-14T01:09:02.580628 #1990] DEBUG -- Pubnub::Client: Created new Pubnub::Client instance. Version: 4.0.25
D, [2017-10-14T01:09:02.581081 #1990] DEBUG -- Pubnub::Event: Initialized Pubnub::Subscribe
D, [2017-10-14T01:09:02.581125 #1990] DEBUG -- Pubnub::Client: Apply state
D, [2017-10-14T01:09:02.581443 #1990] DEBUG -- Pubnub::Subscriber: Adding subscription to Subscriber
D, [2017-10-14T01:09:02.582156 #1990] DEBUG -- Pubnub::Subscriber: Added subscription to Subscriber
D, [2017-10-14T01:09:02.582521 #1990] DEBUG -- Pubnub::Event: Initialized Pubnub::Subscribe
D, [2017-10-14T01:09:02.582557 #1990] DEBUG -- Pubnub::Client: Apply state
D, [2017-10-14T01:09:02.582862 #1990] DEBUG -- Pubnub::Subscriber: Starting subscription
D, [2017-10-14T01:09:02.583102 #1990] DEBUG -- Pubnub: Fired event Pubnub::Subscribe
D, [2017-10-14T01:09:02.583131 #1990] DEBUG -- Pubnub: #send_request start
D, [2017-10-14T01:09:02.583147 #1990] DEBUG -- Pubnub: #request_dispatcher
D, [2017-10-14T01:09:02.583176 #1990] DEBUG -- Pubnub::Client: Looking for requester for async subscribe_event
D, [2017-10-14T01:09:02.583670 #1990] DEBUG -- Pubnub::Event: Requested URI: http://ps.pndsn.com/v2/subscribe/sub-c-3b21e31a-a94f-11e7-80f2-f610152a0f4c/test_789/0?pnsdk=PubNub-Ruby%2F4.0.25&t=%7B%22r%22%3A0%2C%22t%22%3A0%7D&uuid=f568bd89-01c7-460f-a914-fe2d61116aca
D, [2017-10-14T01:09:03.060193 #1990] DEBUG -- Pubnub: Fire before fire_callback
E, [2017-10-14T01:09:03.060408 #1990] ERROR -- : Actor crashed!
Celluloid::DeadActorError: attempted to call a dead actor: fetch_average
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/proxy/sync.rb:9:in `method_missing'
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/client.rb:310:in `telemetry_for'
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/event.rb:76:in `uri'
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/subscribe_event.rb:38:in `fire'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/calls.rb:28:in `public_send'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/calls.rb:28:in `dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/call/sync.rb:16:in `dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/cell.rb:50:in `block in dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/cell.rb:76:in `block in task'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/actor.rb:339:in `block in task'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/task.rb:44:in `block in initialize'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/task/fibered.rb:14:in `block in create'
这就是subscriber.rb文件的样子：
require_relative 'client'
Client.new.pubnub.subscribe(
channel: 'test_channel'
)
其中client.rb：
require 'pubnub'
class Client
attr_reader :pubnub
def initialize
@pubnub = Pubnub.new(
publish_key: 'pub-c-some_proper_pub_key',
subscribe_key: 'sub-c-some_proper_sub_key'
)
setup_listener
end
def setup_listener
callback = Pubnub::SubscribeCallback.new(
message: ->(envelope) {
puts "MESSAGE: #{envelope.result[:data]}"
}
)
pubnub.add_listener(callback: callback)
end
end
我在2.4.1版本中使用Ruby（我也尝试过2.3.3,2.4.0,2.4.2）这就是我Gemfile的样子（我尝试过pubnub gem）在4.0.23版本中）：
source 'https://rubygems.org' do
gem 'pubnub', '~> 4.0.25'
end
Gemfile.lock：
GEM
remote: https://rubygems.org/
specs:
celluloid (0.17.3)
celluloid-essentials
celluloid-extras
celluloid-fsm
celluloid-pool
celluloid-supervision
timers (>= 4.1.1)
celluloid-essentials (0.20.5)
timers (>= 4.1.1)
celluloid-extras (0.20.5)
timers (>= 4.1.1)
celluloid-fsm (0.20.5)
timers (>= 4.1.1)
celluloid-pool (0.20.5)
timers (>= 4.1.1)
celluloid-supervision (0.20.6)
timers (>= 4.1.1)
coderay (1.1.2)
concurrent-ruby (1.0.5)
dry-configurable (0.7.0)
concurrent-ruby (~> 1.0)
dry-container (0.6.0)
concurrent-ruby (~> 1.0)
dry-configurable (~> 0.1, >= 0.1.3)
dry-core (0.3.4)
concurrent-ruby (~> 1.0)
dry-equalizer (0.2.0)
dry-logic (0.4.2)
dry-container (~> 0.2, >= 0.2.6)
dry-core (~> 0.2)
dry-equalizer (~> 0.2)
dry-types (0.12.1)
concurrent-ruby (~> 1.0)
dry-configurable (~> 0.1)
dry-container (~> 0.3)
dry-core (~> 0.2, >= 0.2.1)
dry-equalizer (~> 0.2)
dry-logic (~> 0.4, >= 0.4.2)
inflecto (~> 0.0.0, >= 0.0.2)
dry-validation (0.11.1)
concurrent-ruby (~> 1.0)
dry-configurable (~> 0.1, >= 0.1.3)
dry-core (~> 0.2, >= 0.2.1)
dry-equalizer (~> 0.2)
dry-logic (~> 0.4, >= 0.4.0)
dry-types (~> 0.12.0)
hitimes (1.2.6)
httpclient (2.8.3)
inflecto (0.0.2)
json (2.1.0)
method_source (0.9.0)
pry (0.11.1)
coderay (~> 1.1.0)
method_source (~> 0.9.0)
pubnub (4.0.25)
celluloid (~> 0.17)
dry-validation (~> 0.10)
httpclient (~> 2.8, >= 2.8.3)
json (>= 1.8, < 3)
timers (4.1.2)
hitimes
PLATFORMS
ruby
DEPENDENCIES
pry!
pubnub (~> 4.0.25)!
BUNDLED WITH
1.15.4
这是publisher.rb档案：
require_relative 'client'
Client.new.pubnub.publish(
channel: 'test_channel',
message: { text: "Hi! Message from PUBLISHER! #{Time.now}" }
) do |envelope|
puts envelope.status
end
publisher.rb的输出提供了这样的日志跟踪：
D, [2017-10-14T01:22:08.125841 #3009] DEBUG -- Pubnub::Telementry: Initialized Telemetry
D, [2017-10-14T01:22:08.126657 #3009] DEBUG -- Pubnub::Client: Created new Pubnub::Client instance. Version: 4.0.25
D, [2017-10-14T01:22:08.127096 #3009] DEBUG -- Pubnub::Event: Initialized Pubnub::Publish
D, [2017-10-14T01:22:08.127401 #3009] DEBUG -- Pubnub::Publish: Fired event Pubnub::Publish
D, [2017-10-14T01:22:08.127430 #3009] DEBUG -- Pubnub::Event: #send_request called
D, [2017-10-14T01:22:08.127446 #3009] DEBUG -- Pubnub::SingleEvent: #request_dispatcher called
D, [2017-10-14T01:22:08.127463 #3009] DEBUG -- Pubnub::Client: Looking for requester for async single_event
D, [2017-10-14T01:22:08.127646 #3009] DEBUG -- Pubnub::Event: #send_request got sender
D, [2017-10-14T01:22:08.128004 #3009] DEBUG -- Pubnub::Event: Requested URI: http://ps.pndsn.com/publish/pub-c-4f29acc4-caaf-4037-8bf5-5a93361121d8/sub-c-3b21e31a-a94f-11e7-80f2-f610152a0f4c/0/test_789/0/%7B%22text%22%3A%22Hi%21%20Message%20from%20PUBLISHER%21%20%28%E2%95%AD%E2%98%9E%E2%96%A0%E2%88%80%E2%96%A0%29%E2%95%AD%E2%98%9E%202017-10-14%2001%3A22%3A08%20%2B0200%22%7D?ortt=%7B%22t%22%3A15079369281271240%7D&pnsdk=PubNub-Ruby%2F4.0.25&seqn=1&uuid=5d73c0c5-5977-4d4c-8373-b6d8b8cee80a
D, [2017-10-14T01:22:08.450584 #3009] DEBUG -- Pubnub::Event: Event#handle
E, [2017-10-14T01:22:08.451594 #3009] ERROR -- : Actor crashed!
NoMethodError: undefined method `body' for #<Celluloid::DeadActorError:0x007faf8e0c12b0>
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/event/formatter.rb:11:in `format_envelopes'
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/event.rb:129:in `handle'
/Users/user/.rvm/gems/ruby-2.4.1/gems/pubnub-4.0.25/lib/pubnub/events/publish.rb:36:in `fire'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/calls.rb:28:in `public_send'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/calls.rb:28:in `dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/call/sync.rb:16:in `dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/cell.rb:50:in `block in dispatch'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/cell.rb:76:in `block in task'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/actor.rb:339:in `block in task'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/task.rb:44:in `block in initialize'
/Users/user/.rvm/gems/ruby-2.4.1/gems/celluloid-0.17.3/lib/celluloid/task/fibered.rb:14:in `block in create'
我无法用Celluloid::DeadActorError解决这个问题，我希望有人能为我提供一些如何处理它的线索。有趣的是，当我在2个月前运行此代码时，它工作得很好。
答案 0 :(得分：1)
我已经联系了PubNub支持，结果发现pubnub gem版本4.0.25中存在一个bug，它涉及一个新功能 - 遥测。目前降级到4.0.23解决了这个问题（使用Ruby 2.4.0）。