Gabor Somogyi created SPARK-27002:
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Summary: Latest kafka delegation token not always picked up
Key: SPARK-27002
URL: https://issues.apache.org/jira/browse/SPARK-27002
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Affects Versions: 3.0.0
Reporter: Gabor Somogyi
Lately KAFKA-8004 has been discovered and this triggered me to do further tests
with Spark.
Namely I've created long running Kafka to Kafka tests on 4 node cluster with
randomly thrown artificial exceptions.
Test scenario:
* 4 node cluster
* Yarn
* Kafka broker version 2.1.0
* security.protocol = SASL_SSL
* sasl.mechanism = SCRAM-SHA-512
Kafka broker settings:
* delegation.token.expiry.time.ms=600000 (10 min)
* delegation.token.max.lifetime.ms=1200000 (20 min)
* delegation.token.expiry.check.interval.ms=300000 (5 min)
After each 7.5 minutes new delegation token obtained from Kafka broker (10 min
* 0.75).
But when token expired after 10 minutes (Spark obtains new one the doesn't
renew the old), the brokers expiring thread comes after each 5 minutes
(invalidates expired tokens) and artificial exception has been thrown inside
the Spark application, then the latest delegation token not always picked up.
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