Question

我使用错误的@timestamp字段错误地将许多文档摄取到Elasticsearch中。我已经更改了受影响的Logstash管道以使用正确的时间戳，但是我无法重新摄取旧数据。

但是，我确实有另一个可用作时间戳记（json.created_at）的文档字段。所以我想更新这个领域。我发现我可以使用the _update_by_query操作来执行此操作，但是我尝试了多个无效的版本，包括：

POST logstash-rails_models-*/_update_by_query
{
  "script": {
    "lang": "painless",
    "source": "ctx._source.@timestamp = ctx._source.json.created_at"
  }
}

这抱怨一个意外的字符：

{
  "error": {
    "root_cause": [
      {
        "type": "script_exception",
        "reason": "compile error",
        "script_stack": [
          "ctx._source.@timestamp = ctx._source. ...",
          "            ^---- HERE"
        ],
        "script": "ctx._source.@timestamp = ctx._source.json.created_at",
        "lang": "painless"
      }
    ],
    "type": "script_exception",
    "reason": "compile error",
    "script_stack": [
      "ctx._source.@timestamp = ctx._source. ...",
      "            ^---- HERE"
    ],
    "script": "ctx._source.@timestamp = ctx._source.json.created_at",
    "lang": "painless",
    "caused_by": {
      "type": "illegal_argument_exception",
      "reason": "unexpected character [@].",
      "caused_by": {
        "type": "lexer_no_viable_alt_exception",
        "reason": null
      }
    }
  },
  "status": 500
}

我该怎么办？

Answer 1

访问此字段的正确方法是通过方括号并用引号引起来：

POST logstash-rails_models-*/_update_by_query
{
  "script": {
    "lang": "painless",
    "source": "ctx._source['@timestamp'] = ctx._source.json.created_at"
  }
}

另请参阅this thread和有关updating fields with Painless的更多信息。

如何在Elasticsearch中用另一个字段覆盖@timestamp字段？

1 个答案: