[HBASE-24132] Upgrade to Apache ZooKeeper 3.5.7

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.2.3
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Hadoop Flags: Reviewed

Release Note

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HBase ships ZooKeeper 3.5.x. Was the EOL'd 3.4.x. 3.5.x client can talk to 3.4.x ensemble.

The ZooKeeper project has built a [FAQ](https://cwiki.apache.org/confluence/display/ZOOKEEPER/Upgrade+FAQ) that documents known issues and work-arounds when upgrading existing deployments.

• Assignee: Jianfei Jiang
• Reporter: Jianfei Jiang
• Created: 07/Apr/20 14:22
• Updated: 21/Jul/20 10:57
• Resolved: 29/May/20 20:41

Description

Apache ZooKeeper 3.5.7 has been released, HDFS and other projects have updated the dependent zookeeper verison. Perhaps Hbase may update as well. Some of the interfaces are changed in this zookeeper version .

Issue Links

• breaks: HBASE-24556 HBase upgrade from 2.2 to 2.3 fails due to failure in ZooKeeper
• supercedes: HBASE-15751 Fixed HBase compilation failure with Zookeeper 3.5 and bumped HBase to use zookeeper 3.5
• supercedes: HBASE-22716 upgrade zookeeper version to 3.5.5
• links to: GitHub Pull Request #1453