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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-9478) Add timeout for renew delegation thread pool
Date Fri, 12 Apr 2019 17:35:00 GMT
Aihua Xu created YARN-9478:

             Summary: Add timeout for renew delegation thread pool
                 Key: YARN-9478
                 URL: https://issues.apache.org/jira/browse/YARN-9478
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: Aihua Xu
            Assignee: Aihua Xu

Yarn by default creates a thread pool with 50 threads to handle all the token renewal for
the running jobs. Currently there is no timeout for the threads so if there is one application
is slowing to renew token, then eventually Yarn could run into the situation that all the
threads are busy with renewing tokens for such application types and the whole Yarn cluster
can't handle new applications. 

Propose to add timeout to the threads in the thread pool so the threads get killed after certain

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