Error message - "*** Log file is not found: *** The task might not have been executed, or the worker executing it might have finished abnormally (e.g., was evicted)." Please, refer https://cloud.google.com/composer/docs/how-to/using/troubleshooting-dags#common_issues hints to learn what might be possible for a missing log".
Tried to run DAGs but were not succeeding. It would extremely helpful if someone can assist on this issue.
This usually happens when the task was trying to run but failed half-way cause of OOM or worker eviction.
check serial logs any "OOM" or "CGgroup out of memory".