[TWILL-129] Race condition in leader election if leader quitted before follower set the watch

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.4.0-incubating, 0.5.0-incubating, 0.4.1-incubating
• Fix Version/s: 0.6.0-incubating
• Component/s: zookeeper
• Assignee: Terence Yim
• Reporter: Terence Yim
• Created: 22/May/15 06:00
• Updated: 23/May/15 00:04
• Resolved: 23/May/15 00:04

Description

In the LeaderElection implementation, if the leader quit and delete its node before the next-in-line follower try to set the watch through the exists() call, the follower will fail silently without noticing the leader node is gone.