Missing log lines when writing to cloudwatch from ECS Docker containers

Question

(Docker container on AWS-ECS exits before all the logs are printed to CloudWatch Logs) Why are some streams of a CloudWatch Logs Group incomplete (i.e., the Fargate Docker Conta

Answer 1

I observed this as well. It must be an ECS bug?

My workaround (Python 3.7):

import atexit
from time import sleep

atexit.register(finalizer)

def finalizer():
    logger.info("All tasks have finished. Exiting.")
    # Workaround:
    # Fargate will exit and final batch of CloudWatch logs will be lost
    sleep(10)