zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2988) NPE triggered if server receives a vote for a server id not in their voting view
Date Tue, 17 Apr 2018 15:18:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440997#comment-16440997
] 

ASF GitHub Bot commented on ZOOKEEPER-2988:
-------------------------------------------

Github user enixon commented on the issue:

    https://github.com/apache/zookeeper/pull/476
  
    Tests passing again.
    
    This is what can happen when you use a different logging config and your tests rely on
scraping the logs.  :(


> NPE triggered if server receives a vote for a server id not in their voting view
> --------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2988
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2988
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: leaderElection
>    Affects Versions: 3.5.3, 3.4.11
>            Reporter: Brian Nixon
>            Priority: Minor
>
> We've observed the following behavior in elections when a node is lagging behind the
quorum in its view of the ensemble topology.
> - Node A is operating with node B in its voting view, but without view of node C.
> - B votes for C.
> - A then switches its vote to C, but throws a NPE when attempting to connect.
> This causes the QuorumPeer to spin up a Follower only to immediately have it shutdown
by the exception.
> Ideally, A would not advertise a vote for a server that it will not follow.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message