[jira] [Created] (HADOOP-16013) DecayRpcScheduler decay thread should run as a daemon

["Erik Krogen (JIRA)" <ji...@apache.org>]

Erik Krogen created HADOOP-16013:
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             Summary: 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


{{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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