zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Flavio Paiva 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, 24 Jul 2008 18:05:31 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-87?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616556#action_12616556
] 

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

If you throttle at the follower, then the queue on the leader side will build up, and you
won't have the problem you mention. The approach I describe seems to be safer as you don't
have to wait for the next Leader.PING period to make a decision. It is true that the leader
can send a ping at any time it wants, but if the leader is clueless as you say, then it will
wait for the next ping period and it won't send any exceptional pings.

> 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
>            Reporter: Mahadev konar
>            Assignee: Mahadev konar
>            Priority: Critical
>             Fix For: 3.0.0
>
>
> 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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message