[HBASE-21629] draining_servers.rb is broken

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.1.1, 2.1.2
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.2, 2.0.4
• Component/s: scripts
• Assignee: Nihal Jain
• Reporter: Nihal Jain
• Created: 21/Dec/18 11:10
• Updated: 24/Dec/18 12:32
• Resolved: 24/Dec/18 04:49

Description

1) Handle missing methods and implementation changes in core code.

• In ZKWatcher.java, variable znodePaths has now been made private from public (See HBASE-19761). Currently the script directly tries to reference znodePaths which will result in exception.
• Also, joinZNode method is moved to ZNodePaths and removed from ZKUtil (See HBASE-19200). The script relies on non-existant ZKUtil.joinZNode().

2) Close zk watcher while list draining servers: The list functionality does not close the zkw instance.