Aihua Xu created YARN-9478:
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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 time.
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