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Posted to issues@ratis.apache.org by "Lokesh Jain (JIRA)" <ji...@apache.org> on 2018/12/07 10:47:00 UTC

[jira] [Resolved] (RATIS-436) Isolate heartbeats from append entries

     [ https://issues.apache.org/jira/browse/RATIS-436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lokesh Jain resolved RATIS-436.
-------------------------------
    Resolution: Duplicate

> Isolate heartbeats from append entries
> --------------------------------------
>
>                 Key: RATIS-436
>                 URL: https://issues.apache.org/jira/browse/RATIS-436
>             Project: Ratis
>          Issue Type: Bug
>            Reporter: Lokesh Jain
>            Assignee: Lokesh Jain
>            Priority: Major
>
> Currently heartbeats are sent in the same channel as append entries. It might happen that append entries are blocked due to StateMachine#readStateMachineData. In such a case the heartbeats can be missed. There are two possible solutions -
>  # Create a separate channel for heartbeats
>  # Separate heartbeat logic from append entries in LogAppender. In this case the heartbeats should not be blocked by append entries. One way to do it is to send heartbeats periodically via another thread.



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