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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2700) Force ZooKeeper to generate snapshot
Date Tue, 21 Feb 2017 17:47:44 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15876385#comment-15876385
] 

ASF GitHub Bot commented on ZOOKEEPER-2700:
-------------------------------------------

Github user flier commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/180#discussion_r102271596
  
    --- Diff: src/java/main/org/apache/zookeeper/server/ZooKeeperServer.java ---
    @@ -303,15 +305,38 @@ public void loadData() throws IOException, InterruptedException
{
     
         public void takeSnapshot(){
    --- End diff --
    
    @revans2 It's not easy to find `SyncRequestProcessor `, but we may use [reversed workaroud](https://github.com/apache/zookeeper/pull/180/files#diff-a8615898f7be77e9cfdb686e21c97b1eL123),
let's `SyncRequestProcessor` use `zks.getLastProcessedZxid()-zks.getLastSnapshotZxid()` to
trace snapshot


> Force ZooKeeper to generate snapshot
> ------------------------------------
>
>                 Key: ZOOKEEPER-2700
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2700
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Flier Lu
>            Priority: Minor
>
> When cold backup or remote offline sync Zookeeper instances, we need the latest snapshot.
> Add a four letter `snap` command to force Zookeeper to generate snapshot.



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