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https://issues.apache.org/jira/browse/ZOOKEEPER-1909?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raul Gutierrez Segales updated ZOOKEEPER-1909:
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Attachment: ZOOKEEPER-1909.patch
Updated according to [~rakeshr]'s comments plus the extra check that I think is
needed as well.
> removeWatches doesn't return NOWATCHER when there is no watch set
> -----------------------------------------------------------------
>
> Key: ZOOKEEPER-1909
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1909
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.0
> Reporter: Raul Gutierrez Segales
> Fix For: 3.5.0
>
> Attachments: ZOOKEEPER-1909.patch, ZOOKEEPER-1909.patch,
> ZOOKEEPER-1909.patch
>
>
> ZOOKEEPER-442 introduced support for a new opcode: removeWatches. The way it
> was implemented though, implies that you need to check on the client side if
> a watch/watcher is set *before* you send your request to the server. If you
> don't, ZK will just swallow your request and won't return an error code if
> there isn't a watch set for that path.
> I noticed this whilst implementing removeWatches for Kazoo [1]. As mentioned,
> I guess it could be expected that clients should do the check on their side
> but I think that the correct thing would to have the server do the validation
> and return the error code accordingly as well.
> [~rakeshr], [~phunt]: thoughts?
> [1]
> https://github.com/rgs1/kazoo/commit/44ca48e975aeea3fd0664fe13136a72caf89e54f
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