[mapper_parsing_exception] Provided shape has duplicate consecutive coordinates at

[bartvastgoed]

Elasticsearch version (bin/elasticsearch --version):
5.6.11
Plugins installed: []

JVM version (java -version):
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~16.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)

OS version (uname -a if on a Unix-like system):
Linux myserver 4.4.0-131-generic #157-Ubuntu SMP Thu Jul 12 15:51:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Description of the problem including expected versus actual behavior:
During my bulk inserts I noticed i couldn't insert some of my document with certain coordinates.
Expected; being able to insert said document with said coordinates.

Steps to reproduce:

1. the mapping:

'contour' => [
        'type' => 'geo_shape',
        'tree' => 'quadtree',
        'precision' => '50cm',
    ]

2. try to add a document with the following coordinates:

[[[6.1741779921149,52.900830177646],[6.174375274915,52.900583123989],[6.1745312119037,52.900628656014],[6.174361093674,52.900841695524],[6.1744087549395,52.900855607275],[6.1744473131991,52.900807318579],[6.17464348691,52.900864600397],[6.1746135473049,52.900902093087],[6.174662463802,52.900916373901],[6.1748558926934,52.90067413483],[6.1750103363593,52.900719226747],[6.1747977526217,52.900985452388],[6.1746863379868,52.900952918431],[6.1746759024879,52.90096597319],[6.1745823573715,52.900938659391],[6.1745109963801,52.901028036419],[6.1744516062146,52.901010697223],[6.1744016532655,52.901073260193],[6.1742895066468,52.901040515012],[6.1743392998204,52.900978150851],[6.1743161712153,52.900971392538],[6.1743592207397,52.900917484473],[6.1743692909645,52.900920428633],[6.174389827298,52.900894707808],[6.1743799963032,52.900891842952],[6.1743907949551,52.900878318512],[6.1743446875809,52.900864863819],[6.1743327988597,52.90087975245],[6.1741751578564,52.900833719154],[6.1741779921149,52.900830177646],[6.1741779921149,52.900830177646]]]

3. error.

Provide logs (if relevant):
Output of my terminal during the bulk insert:

 [_index] => my_index_1
            [_type] => my_index_1
            [_id] => 12312313
            [status] => 400
            [error] => Array
                (
                    [type] => mapper_parsing_exception
                    [reason] => failed to parse [contour]
                    [caused_by] => Array
                        (
                            [type] => invalid_shape_exception
                            [reason] => Provided shape has duplicate consecutive coordinates at: (6.1741779921149,52.900830177646, NaN)
                        )

                )

Thanks in advance

[elasticmachine]

Pinging @elastic/es-analytics-geo

[iverase]

I am going to reopen this issue as I think we want to support such a case.

[iverase]

We discuss it with the team and we decided that polygons containing zero length edges are actually invalid. We aim to provide a ingest processor to clean up / make valid incoming shapes.