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https://issues.apache.org/jira/browse/ZOOKEEPER-3132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ChaoWang resolved ZOOKEEPER-3132.
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Resolution: Duplicate
> org.apache.zookeeper.server.WatchManager resource leak
> ------------------------------------------------------
>
> Key: ZOOKEEPER-3132
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3132
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.3, 3.5.4
> Environment: -Xmx512m
> Reporter: ChaoWang
> Priority: Major
>
> In some cases, the variable _watch2Paths_ in _Class WatchManager_ does not
> remove the entry, even if the associated value "HashSet" is empty already.
> The type of key in Map _watch2Paths_ is Watcher, instance of
> _NettyServerCnxn._ If it is not removed when the associated set of paths is
> empty, it will cause the memory increases little by little, and
> OutOfMemoryError triggered finally.
>
> In the following function, the logic should be added to remove the entry.
> org.apache.zookeeper.server.WatchManager#removeWatcher(java.lang.String,
> org.apache.zookeeper.Watcher)
> if (paths.isEmpty()) {
> watch2Paths.remove(watcher);
> }
> For the following function as well:
> org.apache.zookeeper.server.WatchManager#triggerWatch(java.lang.String,
> org.apache.zookeeper.Watcher.Event.EventType,
> java.util.Set<org.apache.zookeeper.Watcher>)
>
> Please confirm this issue?
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