[GitHub] [hadoop] nkalmar commented on issue #1629: HADOOP-16579 - Upgrade to Apache Curator 4.2.0 and ZooKeeper 3.5.5

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nkalmar commented on issue #1629: HADOOP-16579 - Upgrade to Apache Curator 4.2.0 and ZooKeeper 3.5.5
URL: https://github.com/apache/hadoop/pull/1629#issuecomment-540043321
 
 
   I updated ZooKeeper to 3.5.5 as well, not just curator. This way unit tests pass. I also did an integration test with multiple Hadoop component. There were some test failures if they use the new ZK version from Hadoop classpath, as from 3.5+ you need to explicitly whitelist 4 letter commands in ZooKeeper. For example in Solr there were unit test failures. 
   
   But I think this is something other components will wan't to deal anyway, as it is recommended to upgrade to 3.5 ZooKeeper everywhere.

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