HyP3 API Internal Server Error if you specify the same granule twice for a burst job

Jira: https://asfdaac.atlassian.net/browse/TOOL-2505

Note: The above link is accessible only to members of ASF.

I noticed that if you specify the same granule twice for an InSAR Burst job, HyP3 returns an Internal Server Error, e.g:

{
  "jobs": [
    {
      "job_parameters": {
        "apply_water_mask": false,
        "granules": [
          "S1_000693_IW1_20230620T183239_VV_F644-BURST",
          "S1_000693_IW1_20230620T183239_VV_F644-BURST"
        ],
        "looks": "20x4"
      },
      "job_type": "INSAR_ISCE_BURST",
      "name": "Job Name"
    }
  ],
  "validate_only": true
}

Results in:

<!doctype html>
<html lang=en>
<title>500 Internal Server Error</title>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.</p>

We should determine if this applies to other job types, determine the cause of the error, and instead return a 400 Bad Request.

Traceback suggests the problem is specific to the check_valid_polarizations validator used for INSAR_ISCE_TEST jobs. It assumes two granule metadata results from CMR; when the reference and secondary bursts are identical there's only one metadata entry.

Traceback (most recent call last):
  File "/var/task/flask/app.py", line 2529, in wsgi_app
    response = self.full_dispatch_request()
  File "/var/task/flask/app.py", line 1825, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/var/task/flask_cors/extension.py", line 176, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/var/task/flask/app.py", line 1823, in full_dispatch_request
    rv = self.dispatch_request()
  File "/var/task/flask/app.py", line 1799, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "/var/task/openapi_core/contrib/flask/decorators.py", line 55, in decorated
    response = self.handle_request(
  File "/var/task/openapi_core/unmarshalling/processors.py", line 43, in handle_request
    return valid_handler(request_unmarshal_result)
  File "/var/task/openapi_core/contrib/flask/handlers.py", line 74, in __call__
    rv = self.view(*self.view_args, **self.view_kwargs)
  File "/var/task/hyp3_api/routes.py", line 117, in jobs_post
    return jsonify(handlers.post_jobs(request.get_json(), g.user))
  File "/var/task/hyp3_api/handlers.py", line 38, in post_jobs
    validate_jobs(body['jobs'])
  File "/var/task/hyp3_api/validation.py", line 131, in validate_jobs
    validator(job_granule_metadata)
  File "/var/task/hyp3_api/validation.py", line 87, in check_valid_polarizations
    ref_polarization, sec_polarization = [granule['name'].split('_')[4] for granule in granule_metadata]
ValueError: not enough values to unpack (expected 2, got 1)

ASFHyP3 / hyp3

HyP3 API Internal Server Error if you specify the same granule twice for a burst job #2015