[ZOOKEEPER-3085] Define constant exit code and add documents

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.6.0
• Component/s: server
• Labels: newbie pull-request-available
• Assignee: Norbert Kalmár
• Reporter: Fangmin Lv
• Created: 09/Jul/18 19:32
• Updated: 06/Aug/18 12:49
• Resolved: 06/Aug/18 12:11

Description

There are various hard coded exit code in different places of ZooKeeper, which makes it's harder to track. Also we need to add some documents to make it easier to understand what happened when it's exited.

Issue Links

• links to: GitHub Pull Request #572