Glue job keeps running but does not write results

Can check the worker nodes to ensure that they have enough resources to run the job. The warning message in the logs suggests that the worker nodes may not have enough resources to execute the job.

The driver logs should tell you bit what the driver is doing, the warning could not be the cause.
It would be good to enable SparkUI logs and view then in a History Server to check what the driver is doing, has the driver started a Spark job/stage and doesn't get resources?

The most likely cause is that you have multiple stages in the job and the first stage is reading the data with a single task, SparkUI will tell you that. Also check this: https://docs.aws.amazon.com/glue/latest/dg/run-jdbc-parallel-read-job.html