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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2392) upgrade to ZooKeeper 3.3.0
Date Tue, 30 Mar 2010 07:22:27 GMT
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: 0.21.0
         Attachments: 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:
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).

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