anmolnar commented on issue #394: HBASE-22716:upgrade zookeeper version to 3.5.5 URL: https://github.com/apache/hbase/pull/394#issuecomment-514675730 @Apache9 > But if we still want to support 3.4 servers, we can not use the new features for 3.5? Correct. I can imagine some quick workarounds to resolve this: for instance, using feature switches or new features could be introduced in a new major release only. I believe Curator also has some capabilities to detect ZooKeeper server version and enables internal mechanisms accordingly. In order to support multiple ZooKeeper _server_ versions I suggest to duplicate certain HBase nightly tests and run against both server versions. It's completely up to the Hbase community: if you don't want to upgrade, you can stay on 3.4 and support 3.4 only, but be aware that ZooKeeper project has waken up recently and moving forward.
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