gaborgsomogyi opened a new pull request #23906: [SPARK-27002][SS] Get kafka delegation tokens right before consumer/producer created URL: https://github.com/apache/spark/pull/23906 ## What changes were proposed in this pull request? Spark not always picking up the latest Kafka delegation tokens even if a new one properly obtained. In the PR I'm setting delegation tokens right before `KafkaConsumer` and `KafkaProducer` creation to be on the safe side. ## How was this patch tested? 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 (such case Spark closes connection), then the latest delegation token not always picked up.
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