Hi,

I have an issue when setting up a POC of  Python SDK with Flink runner to
run in docker-compose.  The python worker harness was not returning any
error but:
```
python-worker-harness-1  | 2024/03/17 07:10:17 Executing: python -m
apache_beam.runners.worker.sdk_worker_main
python-worker-harness-1  | 2024/03/17 07:10:24 Python exited: <nil>
```
and dead.  The error message seems totally unuseful, and I am wondering if
there's a way to make the harness script show more debug logging.

I started my harness via:
```
/opt/apache/beam/boot --worker_pool
```
and configure my script to use the harness
```
python docker/src/example.py \
  --topic test --group test-group --bootstrap-server
host.docker.internal:9092 \
  --job_endpoint host.docker.internal:8099 \
  --artifact_endpoint host.docker.internal:8098 \
  --environment_type=EXTERNAL \
  --environment_config=host.docker.internal:50000
```
The full settings is available in:
https://github.com/lydian/beam-python-flink-runner-examples
Thanks for your help

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