[Bug]: When the bulkwriter fails to generate a file, it returns an empty list instead of throwing an error.

[zhuwenxing]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When the bulk writer fails to generate a file, it internally handles the error instead of throwing it out, which is not a reasonable behavior.

[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Data path created: /Applications/PyCharm CE.app/Contents/plugins/python-ce/helpers/pycharm/bulk_writer (local_bulk_writer.py:77)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Data path created: /Applications/PyCharm CE.app/Contents/plugins/python-ce/helpers/pycharm/bulk_writer/6c82cb06-dff3-4dcf-ba6e-e2a48c89f262 (local_bulk_writer.py:82)
[2024-10-25 19:42:28 - INFO - remote_bulk_writer]: Minio/S3 blob storage client successfully initialized (remote_bulk_writer.py:157)
[2024-10-25 19:42:28 - INFO - remote_bulk_writer]: Remote buffer writer initialized, target path: /bulk_data/6c82cb06-dff3-4dcf-ba6e-e2a48c89f262 (remote_bulk_writer.py:123)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Prepare to flush buffer, row_count: 1000, size: 1360576 (local_bulk_writer.py:109)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Flush thread begin, name: Thread-10 (local_bulk_writer.py:116)
[2024-10-25 19:42:28 - ERROR - local_bulk_writer]: Failed to fulsh, error: int() argument must be a string, a bytes-like object or a number, not 'NoneType' (local_bulk_writer.py:142)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Wait flush to finish (local_bulk_writer.py:120)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Flush thread finished, name: Thread-10 (local_bulk_writer.py:146)
[2024-10-25 19:42:28 - INFO - local_bulk_writer]: Commit done with async=False (local_bulk_writer.py:124)
[2024-10-25 19:42:28 - INFO - ci_test]: bulk insert files: [] (test_bulk_insert.py:1874)

Expected Behavior

No response

Steps/Code To Reproduce behavior

No response

Environment details

- Hardware/Softward conditions (OS, CPU, GPU, Memory):
- Method of installation (Docker, or from source):
- Milvus version (v0.3.1, or v0.4.0):
- Milvus configuration (Settings you made in `server_config.yaml`):

Anything else?

No response