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https://issues.apache.org/jira/browse/ZOOKEEPER-2136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355416#comment-14355416
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Alexander Shraer commented on ZOOKEEPER-2136:
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as I mentioned on the 2000 jira, I think you'd need to change
PrepRequestProcessor - you need to prepare a transaction for the sync, similar
to create/delete/setdata, and make sure that this transaction is handled
correctly by all other processors
> Sync() should get quorum acks.
> ------------------------------
>
> Key: ZOOKEEPER-2136
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2136
> Project: ZooKeeper
> Issue Type: Sub-task
> Reporter: Hongchao Deng
> Assignee: Hongchao Deng
> Fix For: 3.6.0
>
> Attachments: ZOOKEEPER-2000.patch
>
>
> Currently if the sync packet goes to leader it doesn't get quorum acks. This
> is a problem during reconfig and leader changes. testPortChange() flaky
> failure is caused by such case.
> I proposed to change sync() semantics to require quorum acks in any case.
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