[HBASE-20108] `hbase zkcli` falls into a non-interactive prompt after HBASE-15199

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Usability
• Hadoop Flags: Reviewed

Release Note

This issue fixes a runtime dependency issues where JLine is not made available on the classpath which causes the ZooKeeper CLI to appear non-interactive. JLine was being made available unintentionally via the JRuby jar file on the classpath for the HBase shell. While the JRuby jar is not always present, the fix made here was to selectively include the JLine dependency on the zkcli command's classpath.

• Assignee: Josh Elser
• Reporter: Josh Elser
• Created: 28/Feb/18 22:01
• Updated: 01/Aug/18 06:23
• Resolved: 07/Mar/18 21:01

Description

HBASE-15199 pulls the jruby-complete jar out of the normal classpath for commands run in HBase. Jruby-complete bundles jline inside. ZK uses jline for its nice shell-like usage.

The problem is that this uncovered a bug where we're not explicitly bundling a version of jline to make sure that hbase zkcli actually works. As long as we're expecting zkcli to be there, we should provide jline on the classpath to make sure the users get a real cli.

Thanks to sergey.soldatov for getting to the bottom of it quickly.