vanzin edited a comment on issue #23523: [SPARK-26605][yarn] Update AM's credentials when creating tokens. URL: https://github.com/apache/spark/pull/23523#issuecomment-453633010 Correct. Otherwise the tokens are the same for the lifetime of the AM, there are no new tokens... Err, replied before your edit: this only really affects things if you're using the keytab option. Without the keytab, you don't get new tokens anyway, so after 7 days, nothing will work anyway.
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