[ZOOKEEPER-137] client watcher objects can lose events

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: java client
• Hadoop Flags: Reviewed
• Assignee: Patrick D. Hunt
• Reporter: Patrick D. Hunt
• Created: 08/Sep/08 21:02
• Updated: 26/Oct/08 01:10
• Resolved: 24/Sep/08 21:05

Description

if a single watcher (A) is registered on a single node for both a getdata and exists watch the second watch event may be lost:

1) getdata("node", A)
2) setdata("node"...)
3) exists("node", A)
4) delete("node"...)

if watch events for 2 is processed on the client (zookeeper.java, zkwatcher) after 3 completes then the zkwatcher process event method will clear the watch and the subsequent operation's (4) event will be ignored

Issue Links

• relates to: ZOOKEEPER-124 StatCallback is broken in trunk