15:26:01,612 (Hibernate Search: Elasticsearch transport thread-2) TRACE request:188 - HSEARCH-ES000093: Executed Elasticsearch HTTP POST request to path '/indexname/_search' with query parameters {} in 7ms. Response had status 400 'Bad Request'. Request body: <
{
  "query": {
    "match_all": {}
  },
  "sort": [
    {
      "localDate": {
        "order": "asc",
        "missing": "2018-01-01"
      }
    }
  ]
}
>. Response body: <
{
  "error": {
    "root_cause": [
      {
        "type": "number_format_exception",
        "reason": "For input string: \"2018-01-01\""
      }
    ],
    "type": "search_phase_execution_exception",
    "reason": "all shards failed",
    "phase": "query",
    "grouped": true,
    "failed_shards": [
      {
        "shard": 0,
        "index": "indexname",
        "node": "kEfK1PAbRweMpBcBp1Xm8Q",
        "reason": {
          "type": "number_format_exception",
          "reason": "For input string: \"2018-01-01\""
        }
      }
    ]
  },
  "status": 400
}
>