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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] Created: (ZOOKEEPER-138) c client watcher objects can lose events
Date Mon, 08 Sep 2008 21:05:44 GMT
c client watcher objects can lose events
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                 Key: ZOOKEEPER-138
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-138
             Project: Zookeeper
          Issue Type: Bug
          Components: c client
    Affects Versions: 3.0.0
            Reporter: Patrick Hunt
            Assignee: Mahadev konar
             Fix For: 3.0.0


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

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