SimpleReplay: extract.py gives confusing errors when the selected time range has no data in redshift audit bucket

[jsyrjala]

extract.py gives rather confusing error messages when trying fetch a time range from the Redshift audit log bucket that has no data. Especially when it can take hours until the data arrives to the bucket.

python3 extract.py extract.yaml
[INFO] 2021-04-06 11:12:24 Retrieving logs from s3://my-redshift-audit-bucket/
[INFO] 2021-04-06 11:14:55 Exporting 0 transactions (0 queries) to my-workload/Extraction_2021-04-06T11:12:24.210817+00:00
[INFO] 2021-04-06 11:14:55 Generating 0 missing connections.
[INFO] 2021-04-06 11:14:55 Exporting a total of 0 connections to my-workload/Extraction_2021-04-06T11:12:24.210817+00:00
Traceback (most recent call last):
  File "extract.py", line 1153, in <module>
    config_file["workload_location"] + "/" + extraction_name,
  File "extract.py", line 661, in save_logs
    connections_dict = connection_time_replacement([connection.__dict__ for connection in sorted_connections])
  File "extract.py", line 506, in connection_time_replacement
    min_init_time = sorted_connections[0]['session_initiation_time']
IndexError: list index out of range

[ragsrina]

jsyrjala, Thank you for the feedback. We will take a look and address the issue in up-coming release.