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From "Flavio Junqueira (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-87) Follower does not shut itself down if its too far behind the leader.
Date Thu, 26 Sep 2013 10:30:07 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-87?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778638#comment-13778638
] 

Flavio Junqueira commented on ZOOKEEPER-87:
-------------------------------------------

It looks good to me, but I have one remaining question if you don't mind. Why are you synchronizing
the methods in SyncLimitCheck? There is one instance per LearnerHandler so I'm not sure it
is necessary.
                
> Follower does not shut itself down if its too far behind the leader.
> --------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-87
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-87
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: quorum
>    Affects Versions: 3.5.0, 3.4.5
>            Reporter: Mahadev konar
>            Assignee: Germán Blanco
>            Priority: Critical
>              Labels: patch
>             Fix For: 3.5.0, 3.4.6
>
>         Attachments: ZOOKEEPER-87_3.4.patch, ZOOKEEPER-87_3.4.patch, ZOOKEEPER-87.patch,
ZOOKEEPER-87.patch
>
>
> Currently, the follower if lagging behind keeps sending pings to the leader it will stay
alive and will keep getting further and further behind the leader. The follower should shut
itself down if it is not able to keep up to the leader within some limit so that gurantee
of updates can be made to the clients connected to different servers.

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