WCST_Import error index out of range with recipe "wcs_extract"

[Bang Pham Huu]

I tried to ingest a coverage with recipe "wcs_extract" from local petascope with recipe ( coverage does exist in petascope named "mean_summerair_temp" ).

{
  "config": {
    "service_url": "http://localhost:8088/rasdaman/ows",
    "tmp_directory": "/tmp/",
    "crs_resolver": "http://localhost:8080/def/",
    "default_crs": "http://localhost:8080/def/crs/EPSG/0/4326",
    "mock": false,
    "automated": true,
    "subset_correction" : false
  },
  "input": {
    "coverage_id": "NIR2323"
  },
  "recipe": {
    "name": "wcs_extract",
    "options": {
      "coverage_id": "mean_summerair_temp",
      "wcs_endpoint" : "http://localhost:8088/rasdaman/ows/wcs",
      "partitioning_scheme" : [2720, 2361],
      "tiling": "ALIGNED [0:2000, 0:2000]"
    }
  }
}

and it returns error

An error has occured in the execution of the program. Error Message: list index out of range
Stack Trace: Traceback (most recent call last):
  File "wcst_import.py", line 126, in main
    reg.run_recipe(session)
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/master/recipe/recipe_registry.py", line 72, in run_recipe
    recipe.describe()
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/recipes/wcs_extract/recipe.py", line 82, in describe
    importer = self._get_importer()
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/recipes/wcs_extract/recipe.py", line 112, in _get_importer
    self.importer = Importer(self._get_coverage(), self.options['wms_import'])
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/recipes/wcs_extract/recipe.py", line 105, in _get_coverage
    self.options['partitioning_scheme']).get_coverage()
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/util/coverage_reader.py", line 62, in __init__
    self._read()
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/util/coverage_reader.py", line 385, in _read
    crs = self._get_crs(root).replace("localhost:9090", "localhost:8080")
  File "/home/rasdaman/test_server/ticket_908/rasdaman/applications/wcst_import/util/coverage_reader.py", line 80, in _get_crs
    crs = root.xpath("//gml:Envelope/@srsName", namespaces=self._get_ns())[0].strip()
IndexError: list index out of range

[Alex Dumitru]

It seems the coverage does not have a CRS somehow. Could you attach the DescribeCoverage oputput? ​http://localhost:8088/rasdaman/ows/wcs?service=WCS&version=2.0.1&coverageId=mean_summerair_temp

[Bang Pham Huu]

describe coverage

[Bang Pham Huu]

Yes, I've attached it in here ​http://rasdaman.org/attachment/ticket/1199/mean_summer_airtemp.xml but I think it is another problem as this is imported by system_test.

[Alex Dumitru]

Very weird, I don't see how that xpath could fail with that coverage, I will check in more detail at one point, thanks for reporting

[Bang Pham Huu]

I've tested it and I think the problem is as you suggested (almost right) from wcs_endpoint. There is 2 cases of these problem:

+ If wcs_endpoint does not exist, example: ​http://localhost:8088/rasdaman/ows (my local is ​http://localhost:8088/petascope/ows )
+ If wcs_endpoint does exist but coverage_id does not exist: mean_summerair_temp (instead of mean_summer_airtemp).

So need to check wcs_endpoint first and then check coverage_id does exist. I can do it if you think it is not difficult. Thanks.

[Alex Dumitru]

Ok, glad to confirm that this throws an error only when the input is wrong. We indeed need to provide the user with a better message but not critical right now. I've set priority to minor, maybe we can do it when there's a bit more time.

[Bang Pham Huu]

Alex, it has been done in code review and wait for you and Vlad. I'm reading ticket 1188 (test WCPS 2.0 requirement and doing it now), Thanks.

[Bang Pham Huu]

the patch was accepted, close here, thanks.