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https://issues.apache.org/jira/browse/ZOOKEEPER-1092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13048237#comment-13048237
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Benjamin Reed commented on ZOOKEEPER-1092:
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just to correct slightly my earlier statement. we do indirectly take advantage
of the fact that the datatree contains only committed operations: if the leader
tells a follower to truncate, we know that we only need to truncate the log; we
don't need to worry about removing anything from the data tree since everything
in the tree is committed.
> get rid of pending changes
> --------------------------
>
> Key: ZOOKEEPER-1092
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1092
> Project: ZooKeeper
> Issue Type: Improvement
> Reporter: Benjamin Reed
> Priority: Minor
>
> pending changes used by PrepRequestProcessor and FinalRequestProcessor is
> complicated and requires synchronization between threads.
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