Yarn is not aggregating application logs

First of all, you need to check NodeManager logs. There may be at least two problems: Log aggregation is not initialized problem: https://mchesnavsky.tech/log-aggregation-is-not-initialized HDFS DELEGATION TOKEN can’t be found in cache problem: https://mchesnavsky.tech/hdfs-delegation-token-cant-be-found-in-cache Please, refer to corresponding article, or made a note in comments below, if you have any other problem.