Jason Lowe created YARN-2972:
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Summary: DelegationTokenRenewer thread pool never expands
Key: YARN-2972
URL: https://issues.apache.org/jira/browse/YARN-2972
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.5.0
Reporter: Jason Lowe
Assignee: Jason Lowe
DelegationTokenRenewer uses a thread pool to manage token renewals. The number
of threads is configurable, but unfortunately the pool never expands beyond the
hardcoded initial 5 threads because we are using an unbounded
LinkedBlockingQueue. ThreadPoolExecutor only grows the thread pool beyond the
core size when the specified queue is full.
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