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https://issues.apache.org/jira/browse/TWILL-131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14573746#comment-14573746
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Gary Helmling commented on TWILL-131:
-------------------------------------
This sounds like a good application of container znodes (ZOOKEEPER-2163) once
they are available (not until ZK 3.6 is released). Until then, sounds like we
might need something like the Curator Reaper class that is described in that
issue.
> Zookeepers nodes are not removed
> --------------------------------
>
> Key: TWILL-131
> URL: https://issues.apache.org/jira/browse/TWILL-131
> Project: Apache Twill
> Issue Type: Bug
> Components: discovery, zookeeper
> Affects Versions: 0.5.0-incubating
> Reporter: Colin B.
>
> When a TwillRunnable is run with the YarnTwillRunnerService, a zookeeper node
> is created and never removed.
> For example run the example HelloWorld application:
> {code}
> java -cp $CP org.apache.twill.example.yarn.HelloWorld localhost:2181/hello
> {code}
> After the application had run to completion I looked at zookeeper and found:
> {code}
> > ./zkCli.sh ls /hello
> ...
> [HelloWorldRunnable]
> {code}
> However I expected:
> {code}
> > ./zkCli.sh ls /hello
> ...
> []
> {code}
> This becomes an issue when a service creates a large number of
> TwillApplications with unique names.
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