Zhijie Shen created YARN-2770:
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Summary: Timeline delegation tokens need to be automatically
renewed by the RM
Key: YARN-2770
URL: https://issues.apache.org/jira/browse/YARN-2770
Project: Hadoop YARN
Issue Type: Sub-task
Components: timelineserver
Affects Versions: 2.5.0
Reporter: Zhijie Shen
Assignee: Zhijie Shen
Priority: Critical
YarnClient will automatically grab a timeline DT for the application and pass
it to the app AM. Now the timeline DT renew is still dummy. If an app is
running for more than 24h (default DT expiry time), the app AM is no longer
able to use the expired DT to communicate with the timeline server. Since RM
will cache the credentials of each app, and renew the DTs for the running app.
We should provider renew hooks similar to what HDFS DT has for RM, and set RM
user as the renewer when grabbing the timeline DT.
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