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Posted to dev@zookeeper.apache.org by "Flavio Junqueira (Reopened) (JIRA)" <ji...@apache.org> on 2011/11/05 09:54:51 UTC
[jira] [Reopened] (ZOOKEEPER-1270) testEarlyLeaderAbandonment
failing intermittently, quorum formed, no serving.
[ https://issues.apache.org/jira/browse/ZOOKEEPER-1270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Flavio Junqueira reopened ZOOKEEPER-1270:
-----------------------------------------
Sorry for missing part of the fun.
Alex, Thanks for spotting the duplicate, that was a great catch. I'm not convinced that your patch completely solves the problem, though. LearnerHandler sends NEWLEADER concurrently with the leader adding NEWLEADER to outstandingRequests, so even fixing the barriers as you did does not prevent the race I mentioned above, I think.
I must say that I didn't find my proposed patch very elegant, but I'm not entirely sure that yours covers all cases, so let me know what you think.
> testEarlyLeaderAbandonment failing intermittently, quorum formed, no serving.
> -----------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1270
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1270
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Reporter: Patrick Hunt
> Assignee: Flavio Junqueira
> Priority: Blocker
> Fix For: 3.4.0, 3.5.0
>
> Attachments: ZOOKEEPER-1270-1194.patch, ZOOKEEPER-1270-and-1194-branch34.patch, ZOOKEEPER-1270-and-1194.patch, ZOOKEEPER-1270-and-1194.patch, ZOOKEEPER-1270.patch, ZOOKEEPER-1270.patch, ZOOKEEPER-1270_br34.patch, ZOOKEEPER-1270tests.patch, ZOOKEEPER-1270tests2.patch, testEarlyLeaderAbandonment.txt.gz, testEarlyLeaderAbandonment2.txt.gz, testEarlyLeaderAbandonment3.txt.gz, testEarlyLeaderAbandonment4.txt.gz, zookeeper-1270-1194-34.patch
>
>
> Looks pretty serious - quorum is formed but no clients can attach. Will attach logs momentarily.
> This test was introduced in the following commit (all three jira commit at once):
> ZOOKEEPER-335. zookeeper servers should commit the new leader txn to their logs.
> ZOOKEEPER-1081. modify leader/follower code to correctly deal with new leader
> ZOOKEEPER-1082. modify leader election to correctly take into account current
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