[ZOOKEEPER-2726] Patch for ZOOKEEPER-2693 introduces potential race condition

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.4.10, 3.5.3, 3.6.0
• Assignee: Kyle Nusbaum
• Reporter: Kyle Nusbaum
• Created: 16/Mar/17 19:15
• Updated: 31/Mar/17 09:01
• Resolved: 16/Mar/17 20:01

Description

We noticed when porting the patch, that isEnabled is not thread-safe.
Synchronizing it and resetWhitelist should solve the issue.

Issue Links

• relates to: ZOOKEEPER-2693 DOS attack on wchp/wchc four letter words (4lw)
• links to: GitHub Pull Request #196
• links to: GitHub Pull Request #197
• links to: GitHub Pull Request #198