Kezhu Wang created ZOOKEEPER-4471:
-------------------------------------
Summary: Remove WatcherType.Children break persistent watcher's
child events
Key: ZOOKEEPER-4471
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4471
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.7.0, 3.6.3
Reporter: Kezhu Wang
{{AddWatchMode.PERSISTENT}} was divided as data and child watch in server side.
When remove {{WatcherType.Children}}, child part of {{AddWatchMode.PERSISTENT}}
is removed but not its data part. This could introduce trick usage of
persistent data watch while there is no official api for this. It is better
forbid this by dedicate {{WatcherType.Children}} to standard child watch only.
I
[commits|https://github.com/kezhuw/zookeeper/commit/f7a996646074114830bdc2361e8ff679d08c00bc]
a modified {{RemoveWatchesTest.testRemoveAllChildWatchesOnAPath}} in my local
repo to reproduce this.
I think it is better to support {{removeWatches}} for two persistent watchers
too. But it might be a separate issue.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
