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https://issues.apache.org/jira/browse/HADOOP-16013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HADOOP-16013:
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Fix Version/s: 3.2.2
3.1.4
> DecayRpcScheduler decay thread should run as a daemon
> -----------------------------------------------------
>
> Key: HADOOP-16013
> URL: https://issues.apache.org/jira/browse/HADOOP-16013
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 3.3.0
> Reporter: Erik Krogen
> Assignee: Erik Krogen
> Priority: Major
> Fix For: 2.10.0, 3.3.0, 3.1.4, 3.2.2
>
> Attachments: HADOOP-16013.000.patch
>
>
> {{DecayRpcScheduler}} sets up a {{Timer}} to schedule a decay of the weights
> it tracks:
> {code}
> // Setup delay timer
> Timer timer = new Timer();
> DecayTask task = new DecayTask(this, timer);
> timer.scheduleAtFixedRate(task, decayPeriodMillis, decayPeriodMillis);
> {code}
> However this Timer is not set up as a daemon thread. I have seen this cause
> my JVM to refuse to exit when running, for example, NNThroughputBenchmark
> with FairCallQueue enabled.
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