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https://issues.apache.org/jira/browse/ZOOKEEPER-87?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778674#comment-13778674
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Germán Blanco commented on ZOOKEEPER-87:
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No problem at all :-)
If I am not wrong, the methods are called from different threads. It seemed so
also in the logs.
- "ping" is called from the "lead" method in Leader.java that runs within the
QuorumPeer thread.
- "updateProposal" is called from "sendPackets" which has an independent thread
created in "startSendingPackets".
- "start" and "updateAck" are called from "run" in the LearnerHandler thread.
> 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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