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https://issues.apache.org/jira/browse/ZOOKEEPER-2?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Hunt updated ZOOKEEPER-2:
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Status: Open (was: Patch Available)
This patch fails "ant test", specifically I see alot of the following in the
log:
Exception in thread "QuorumPeer" java.lang.NullPointerException
at
org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:397)
(I ran the tests 3 times, failed each time in the same way, mainline test
passes fine)
This is ubuntu machine with java 1.6.0_06 (single cpu/core)
> Synchronization issues in QuorumPeer and FastLeader election
> ------------------------------------------------------------
>
> Key: ZOOKEEPER-2
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2
> Project: Zookeeper
> Issue Type: Bug
> Components: leaderElection
> Reporter: Benjamin Reed
> Assignee: Flavio Paiva Junqueira
> Attachments: patch-le-polish, patch-le-polish
>
>
> There are a couple of cases of member variables that need to be marked
> volatile or surrounded in a synchronization block. A couple of examples are:
> * QuorumPeer state should be synchronous
> * currentVote in QuorumPeer is marked volatile, but when it's members are
> often accessed individually as if they were in an atomic unit. Such code
> should be changed to get a reference to the currentVote and they access
> members through that reference.
> * It looks like logicalClock in FastLeaderElection should be volatile. It
> should either be fixed or commented to explain why it doesn't need to be.
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