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Posted to dev@ratis.apache.org by GitBox <gi...@apache.org> on 2020/12/23 03:03:12 UTC

[GitHub] [incubator-ratis] szetszwo commented on pull request #372: RATIS-1260. Implement transferLeaderShip in server

szetszwo commented on pull request #372:
URL: https://github.com/apache/incubator-ratis/pull/372#issuecomment-749899296


   > Not sure whether TimeoutScheduler is enough, if user pass a big value of timeout, such as 100 seconds, but transferLeadership finish in 1 second, we should not return to client after 100 seconds, so maybe we have to check periodically to return to client as soon as possible.
   
   When the leader receives a request, it creates a reply future F and a timeout task T.  If the leader has successfully transferred leadership within timeout, it completes F.  When timeout occurs, T checks if F has already been completed.  If yes, T does nothing.  Otherwise, it completes F exceptionally.
   
   In asynchronous event driven, everything is triggered by an event.  It should not periodically check if an event has occurred.


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