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Posted to dev@zookeeper.apache.org by "Gary Malouf (Resolved) (JIRA)" <ji...@apache.org> on 2012/02/25 19:41:48 UTC
[jira] [Resolved] (ZOOKEEPER-1393) ZooKeeper client exists()
javadoc incorrectly states watcher(s) will be triggered on node deletion
[ https://issues.apache.org/jira/browse/ZOOKEEPER-1393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gary Malouf resolved ZOOKEEPER-1393.
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Resolution: Invalid
It turned out to be an issue related to the client wrapper I was using.
> ZooKeeper client exists() javadoc incorrectly states watcher(s) will be triggered on node deletion
> --------------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1393
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1393
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.3.4, 3.4.2
> Reporter: Gary Malouf
> Priority: Minor
> Original Estimate: 20m
> Remaining Estimate: 20m
>
> I found it very misleading that the javadoc for the exists() calls that take a boolean or a Watcher state that 'The watch will be triggered by a successful operation that creates/delete the node or sets the data on the node.'
> What I've seen from descriptions of bugs (older but this is this references it http://zookeeper-user.578899.n2.nabble.com/Exists-Watch-Triggered-by-Delete-td1490893.html) and my own personal usage is that watchers set on exists() are triggered when a non-existing node is now created or an existing node is changed. They are NOT triggered when the node already exists and is deleted.
> http://zookeeper.apache.org/doc/r3.4.3/api/index.html
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