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https://issues.apache.org/jira/browse/ZOOKEEPER-2988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459072#comment-16459072
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Hadoop QA commented on ZOOKEEPER-2988:
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-1 overall. GitHub Pull Request Build
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 3.0.1)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1656//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1656//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1656//console
This message is automatically generated.
> 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
> Assignee: Brian Nixon
> Priority: Minor
> Fix For: 3.5.4, 3.6.0
>
>
> 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.
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