[HBASE-28345] Close HBase connection on exit from HBase Shell

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.17
• Fix Version/s: 2.6.0, 2.4.18, 4.0.0-alpha-1, 2.5.8, 3.0.0-beta-2
• Component/s: shell
• Labels: pull-request-available
• Assignee: Istvan Toth
• Reporter: Istvan Toth
• Created: 06/Feb/24 15:18
• Updated: 09/Feb/24 09:20
• Resolved: 08/Feb/24 07:34

Description

When using Netty for the ZK client, hbase shell hangs on exit.
This is caused by the non-deamon Netty threads that ZK creates.

Wheter ZK should create daemon threads for Netty or not is debatable, but explicitly closing the connection in hbase shell on exit fixes the issue.

Issue Links

• relates to: HBASE-28353 Close HBase connection on implicit exit from HBase shell
• links to: GitHub Pull Request #5665