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https://issues.apache.org/jira/browse/ZOOKEEPER-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112350#comment-13112350
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Hadoop QA commented on ZOOKEEPER-1192:
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+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12496069/ZOOKEEPER-1192.patch
against trunk revision 1172406.
+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 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/577//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/577//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/577//console
This message is automatically generated.
> Leader.waitForEpochAck() checks waitingForNewEpoch instead of checking
> electionFinished
> ---------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1192
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1192
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Reporter: Alexander Shraer
> Assignee: Alexander Shraer
> Priority: Critical
> Fix For: 3.4.0, 3.5.0
>
> Attachments: ZOOKEEPER-1192.patch, zookeeper-1192-ver1.patch,
> zookeeper-1192.patch
>
>
> A follower/leader should block in Leader.waitForEpochAck() until either
> electingFollowers contains a quorum and electionFinished=true or until a
> timeout occurs. A timeout means that a quorum of followers didn't ack the
> epoch on time, which is an error.
> But the check in Leader.waitForEpochAck() is "if (waitingForNewEpoch)
> throw..." and this will never be triggered, even if the wait statement just
> timed out, because Leader.getEpochToPropose() completes and sets
> waitingForNewEpoch to false before Leader.waitForEpochAck() is invoked.
> Instead of "if (waitingForNewEpoch) throw" the condition in
> Leader.waitForEpochAck() should be "if (!electionFinished) throw".
> The guarded block introduced in ZK-1191 should be checking !electionFinished.
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