[HBASE-28563] Closing ZooKeeper in ZKMainServer

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.4.18, 2.7.0, 3.0.0-beta-2, 2.6.1, 2.5.9
• Component/s: Zookeeper
• Labels: pull-request-available
• Hadoop Flags: Reviewed
• Assignee: Minwoo Kang
• Reporter: Minwoo Kang
• Created: 03/May/24 00:37
• Updated: 09/May/24 06:37
• Resolved: 08/May/24 08:02

Description

Users can switch the Zookeeper client/server communication framework to Netty.
ZKMainServer process fails to terminate due to when users utilize Netty for ZooKeeper connections.
Netty threads identified as non-Daemon threads.
Enforce the calling of close() on ZooKeeper before ZKMainServer termination.

Issue Links

• links to: GitHub Pull Request #5869