ruby - Why is the error `Celluloid::Condition signaled spuriously` caused in Celluloid? -

i'm trying wait on condition of async code, here's snippet:

condition = celluloid::condition.new    rails.logger.debug "sending rpc request #{subject}" nats.start uri: env['nats_server']    rails.logger.debug "connected #{env['nats_server']}"   sid = nats.request(subject,msg) |response|     rails.logger.debug "assigning response"     condition.signal response     nats.stop   end   nats.timeout(sid, 1)     nats.stop     condition.signal async_error     raise "one second timeout waiting nats rpc reply #{subject}"   end end  result = condition.wait if result = async_error   raise "error in rpc call" else   return result end 

i exception celluloid::condition signaled spuriously there's no information , don't understand why caused , https://github.com/celluloid/celluloid/wiki/conditions doesn't provide more information.

why caused , how can fix it?

and answer question stated question, using condition.

within scope of actor:

class nats   include celluloid    def initialize     @condition = celluloid::condition.new   end    def start     rails.logger.debug "sending rpc request #{subject}"     nats.start uri: env['nats_server']        rails.logger.debug "connected #{env['nats_server']}"       sid = nats.request(subject,msg) |response|         rails.logger.debug "assigning response"         @condition.signal response         nats.stop       end       nats.timeout(sid, 1)         nats.stop         @condition.signal async_error         raise "one second timeout waiting nats rpc reply #{subject}"       end     end   end    def value     @condition.wait   end end  nats = nats.new nats.async.start  result = nats.value if result = async_error   raise "error in rpc call" else   return result end 

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this less tested, ought show basic approach if aren't going use future other answer.