[ZOOKEEPER-2795] Change log level for "ZKShutdownHandler is not registered" error message

• Type: Wish
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.4.10, 3.5.3, 3.6.0
• Fix Version/s: 3.5.4, 3.6.0, 3.4.12
• Assignee: Abraham Fine
• Reporter: Andy Chambers
• Created: 30/May/17 15:32
• Updated: 07/May/18 07:57
• Resolved: 21/Nov/17 17:39

Description

We have an integration test suite that starts up an embedded version of zookeeper as part of a suite of services.

However because it doesn't register a shutdown handler, we get lots of warnings that look like this

17-05-30 15:04:56 achambers.local ERROR [org.apache.zookeeper.server.ZooKeeperServer:472] - ZKShutdownHandler is not registered, so ZooKeeper server won't take any action on ERROR or SHUTDOWN server state changes

My java is a bit rusty but I think I can't create one of these shutdown handlers from outside the "org.apache.zookeeper.server" package because the constructor has not been marked "public". Would it be possible to do so?

Issue Links

• Is contained by: ZOOKEEPER-2991 Server logs error on shutdown
• links to: GitHub Pull Request #273