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.

If you still have any questions, feel free to ask me in the comments under this article or write me at promark33@gmail.com.

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