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https://issues.apache.org/jira/browse/ZOOKEEPER-1552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471686#comment-13471686
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Thawan Kooburat commented on ZOOKEEPER-1552:
--------------------------------------------

Observer doesn't participant in the voting, so this should not affect the 
correctness of the operation. This patch is mainly for optimization for 
observer restart and reusing existing facility minimize the code changes. Let 
me know if you want me to modify the patch in anyway.  
                
> Enable sync request processor in Observer
> -----------------------------------------
>
>                 Key: ZOOKEEPER-1552
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1552
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.4.3
>            Reporter: Thawan Kooburat
>            Assignee: Thawan Kooburat
>             Fix For: 3.5.0
>
>         Attachments: ZOOKEEPER-1552.patch
>
>
> Observer doesn't forward its txns to SyncRequestProcessor. So it never 
> persists the txns onto disk or periodically creates snapshots. This increases 
> the start-up time since it will get the entire snapshot if the observer has 
> be running for a long time. 

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