[jira] Reopened: (HBASE-2392) upgrade to ZooKeeper 3.3.0

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-2392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell reopened HBASE-2392:
-----------------------------------


Upgrade to 3.3.1 (ZOOKEEPER-737) if in time for release, otherwise leave 3.3.0 in place. 

> upgrade to ZooKeeper 3.3.0
> --------------------------
>
>                 Key: HBASE-2392
>                 URL: https://issues.apache.org/jira/browse/HBASE-2392
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.20.4, 0.21.0
>
>         Attachments: HBASE-2392.patch, HBASE-2392.patch
>
>
> See http://hadoop.apache.org/zookeeper/docs/r3.3.0/releasenotes.html
> Key features of the 3.3.0 release:
> * observers - non-voting members of the ensemble, scale reads  http://bit.ly/9wPnpq
> * distributed queue recipe implementation (c/java)
> * additional 4letterword/jmx features to support operations
> Changes in contrib:
> * zookeeper-tree: export/import znode namespace
> * zooinspector: gui browser for znode namespace
> * bookkeeper client rewrite, use of netty
> This change can't be done on the 0.20 branch. From the release notes:
> {quote}
> Note: a new feature was added to the version 3.3 client which breaks backward compatibility, at the wire protocol level, between version 3.3 clients and prior versions of the server (server versions prior to 3.3).
> {quote}

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