Deletion of resources fail with ERROR:root:list index out of range

[marrobi]

This has been reported a number of times this past week, and occurs when deleting a resource, possibly when in a failed state.

2023-06-12T19:48:56.995524815Z ERROR:root:list index out of range
2023-06-12T19:48:56.995597816Z Traceback (most recent call last):
2023-06-12T19:48:56.995606916Z File "/usr/local/lib/python3.8/site-packages/anyio/streams/memory.py", line 94, in receive
2023-06-12T19:48:56.995612416Z return self.receive_nowait()
2023-06-12T19:48:56.995616616Z File "/usr/local/lib/python3.8/site-packages/anyio/streams/memory.py", line 89, in receive_nowait
2023-06-12T19:48:56.995620817Z raise WouldBlock
2023-06-12T19:48:56.995624817Z anyio.WouldBlock

also

2023-06-13T07:43:35.111515699Z ERROR:root:Failed to send workspace resource delete message
2023-06-13T07:43:35.111665102Z Traceback (most recent call last):
2023-06-13T07:43:35.111678602Z File "/api/api/routes/resource_helpers.py", line 180, in send_uninstall_message
2023-06-13T07:43:35.111683502Z operation = await send_resource_request_message(
2023-06-13T07:43:35.111688102Z File "/api/service_bus/resource_request_sender.py", line 44, in send_resource_request_message
2023-06-13T07:43:35.111692402Z first_step = operation.steps[0]
2023-06-13T07:43:35.111696502Z IndexError: list index out of range
2023-06-13T07:43:35.112036209Z ERROR:root:Failed to send workspace resource delete message
2023-06-13T07:43:35.112060910Z Exception message: 'list index out of range'

2023-06-13T07:43:40.052936938Z INFO:root:Got a session containing messages: f49286ed-591d-4eae-8c54-cc1156ae88de
2023-06-13T07:43:40.105665076Z INFO:root:Received and parsed JSON for: d5503b06-c022-4e96-b4a8-93e4f0654c9a
2023-06-13T07:43:40.195683750Z INFO:root:Update status in DB for f49286ed-591d-4eae-8c54-cc1156ae88de - deleting_failed

2023-06-13T07:43:42.053870960Z INFO:root:Closing session: f49286ed-591d-4eae-8c54-cc1156ae88de
2023-06-13T07:43:43.054007072Z INFO:root:Looking for new session...

Also sometimes get:

{
  "status_code": 503,
  "body": "Service bus failure"
}

returned.

I believe this is caused by this call:

AzureTRE/api_app/service_bus/resource_request_sender.py

Line 44 in e5c0c9a

first_step = operation.steps[0]