RequestError: TransportError(400, u'mapper_parsing_exception'， u'failed to parse')

Creating an index:

创建索引:

def create_index(index_name):
    es=create_elastic_search_object()
    entry_mapping = {
    'entry-type': {
        'properties': {
            'text': {'type': 'string'},
            'coordinates': {'type': 'geo_point'},
            'username':{'type': 'string'} }
            }
            }
    es.indices.create(index_name,body={'mappings':entry_mapping})
def create_index(i