Tom Distler created ZOOKEEPER-2147:
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Summary: Remove ZOO_NOTWATCHING_EVENT
Key: ZOOKEEPER-2147
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2147
Project: ZooKeeper
Issue Type: Improvement
Environment: All platforms
Reporter: Tom Distler
Priority: Trivial
A review of the ZK code shows that the NOTWATCHING event is never raised.
However, most client users wouldn't know this and would (hopefully) write code
to handle the event. We ran into this in our own code, as I refactored some
event handling only to find this event isn't going to occur.
The responses from the community in the following discussion seem to confirm
that this event should be removed:
http://grokbase.com/t/zookeeper/user/1123dc333d/not-watching-event
I'm prepared to submit a patch (tested in our load-test environment) if this
issue is accepted. I've removed the event completely from all client code (C,
Python, etc). One possibility is to leave the event definition in-place, but
add a "deprecated" comment so-as not to break existing code.
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