AWS Glue now provides continuous logs to track real-time progress of executing Apache Spark stages in ETL jobs . You can access different log streams for Apache Spark driver and executors in Amazon CloudWatch and filter out highly verbose Apache Spark log messages making it easier to monitor and debug your ETL jobs. 

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/05/aws-glue-now-enables-continuous-logging-for-spark-etl-jobs/