zookeeper-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Maniu (Jira)" <j...@apache.org>
Subject [jira] [Comment Edited] (ZOOKEEPER-2164) fast leader election keeps failing
Date Tue, 24 Sep 2019 19:33:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16937122#comment-16937122
] 

Maniu edited comment on ZOOKEEPER-2164 at 9/24/19 7:32 PM:
-----------------------------------------------------------

[~ecnepsnai] Is the above issue fixed ?.We to face the same issue.


was (Author: mani109):
[~ecnepsnai] Is the above issue fixed.We to face the same issue.

> fast leader election keeps failing
> ----------------------------------
>
>                 Key: ZOOKEEPER-2164
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2164
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: leaderElection
>    Affects Versions: 3.4.5
>            Reporter: Michi Mutsuzaki
>            Priority: Major
>             Fix For: 3.6.0, 3.5.7
>
>
> I have a 3-node cluster with sids 1, 2 and 3. Originally 2 is the leader. When I shut
down 2, 1 and 3 keep going back to leader election. Here is what seems to be happening.
> - Both 1 and 3 elect 3 as the leader.
> - 1 receives votes from 3 and itself, and starts trying to connect to 3 as a follower.
> - 3 doesn't receive votes for 5 seconds because connectOne() to 2 doesn't timeout for
5 seconds: https://github.com/apache/zookeeper/blob/41c9fcb3ca09cd3d05e59fe47f08ecf0b85532c8/src/java/main/org/apache/zookeeper/server/quorum/QuorumCnxManager.java#L346
> - By the time 3 receives votes, 1 has given up trying to connect to 3: https://github.com/apache/zookeeper/blob/41c9fcb3ca09cd3d05e59fe47f08ecf0b85532c8/src/java/main/org/apache/zookeeper/server/quorum/Learner.java#L247
> I'm using 3.4.5, but it looks like this part of the code hasn't changed for a while,
so I'm guessing later versions have the same issue.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

Mime
View raw message