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https://issues.apache.org/jira/browse/ZOOKEEPER-1343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175410#comment-13175410
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Flavio Junqueira commented on ZOOKEEPER-1343:
---------------------------------------------
The problem described occurs when the last accepted epoch e of a peer p is one
more than the last accepted epoch e' of another peer p' (e' = e + 1). If
getEpochToPropose is called for p before being called for p', then the value of
epoch will be e' instead of e' + 1.
I can try to take a cut at a test. I have already checked that the modification
doesn't break anything.
> getEpochToPropose should check if lastAcceptedEpoch is greater or equal than
> epoch
> ----------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1343
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1343
> Project: ZooKeeper
> Issue Type: Bug
> Reporter: Flavio Junqueira
> Assignee: Flavio Junqueira
>
> The following block in Leader.getEpochToPropose:
> {noformat}
> if (lastAcceptedEpoch > epoch) {
> epoch = lastAcceptedEpoch+1;
> }
> {noformat}
> needs to be fixed, since it doesn't increment the epoch variable in the case
> epoch != -1 (initial value) and lastAcceptedEpoch is equal. The fix trivial
> and corresponds to changing > with >=.
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