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From "Jordan Zimmerman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CURATOR-14) Memory leak in Curator watches
Date Fri, 12 Jul 2013 21:37:48 GMT

    [ https://issues.apache.org/jira/browse/CURATOR-14?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707407#comment-13707407
] 

Jordan Zimmerman commented on CURATOR-14:
-----------------------------------------

Yeah, there's no way to remove a watcher...

I have an alternate implementation that removes the syncs. As I implemented it I realized
that Soft Refs aren't really needed. Watchers stay active until they fire and Ioannis' code
already removes the mapping watcher when it fires. Please correct me if I'm wrong.

https://gist.github.com/Randgalt/5988052
                
> Memory leak in Curator watches
> ------------------------------
>
>                 Key: CURATOR-14
>                 URL: https://issues.apache.org/jira/browse/CURATOR-14
>             Project: Apache Curator
>          Issue Type: New Feature
>          Components: Recipes
>    Affects Versions: 2.0.0-incubating
>            Reporter: Brandon Beck
>            Priority: Minor
>         Attachments: CURATOR-14-dispatchingwatcher.patch, CURATOR-14-draft-2.patch, CURATOR-14-draft-3.patch,
CURATOR-14.patch, MemoryTest.java
>
>
> The JVM runs out of memory if you repetitively create a PathChildrenCache, start it then
immediately stop it.  It appears that the memory is taken up by a watch that isn't ever cleaned
up.  Curator attempts to do some pooling of watches, but doesn't seem to use the path in the
pooling.

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