illegal_argument_exception - unexpected metadata [op:[TEST]] in source

[rishabh-mmc]

Elasticsearch Version

8.12.2

Installed Plugins

No response

Java Version

bundled

OS Version

Mac OS Sonomo (14.4.1)

Problem Description

Unable to update any document when there is field named op in mapping.

Steps to Reproduce

// Create Mapping

PUT op_index_test

{
  "mappings": {
    "properties": {
      "firstName": {
        "type": "text"
      },
      "lastName": {
        "type": "text"
      },
      "op": {
        "type": "keyword"
      },
      "orgId": {
        "type": "integer"
      }
    }
  }
}

// insert data
POST op_index_test/_doc/1

{"firstName": "BQCayRMVdN", "lastName": "vVDUmYONQW", "orgId": 1, "op": ["TEST"]}

// update by query
POST op_index_test/_update_by_query

{
  "script": {
    "source": """
    if (ctx._source.orgId == 1) { ctx._source.firstName = ctx._source.firstName}
    """,
    "lang": "painless"
  },
  "query": { 
    "match": {
      "orgId": 1
    }
  }
}

Error:

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "unexpected metadata [op:[TEST]] in source"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "unexpected metadata [op:[TEST]] in source"
  },
  "status": 400
}

Logs (if relevant)

No response

[elasticsearchmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)

[williamrandolph]

I wasn't able to reproduce this issue. Is there a stack trace in the Elasticsearch application logs that you could share?

[rishabh-mmc]

@williamrandolph I am not seeing any logs while hitting this request.

[rishabh-mmc]

@williamrandolph can you share configuration you used while trying to reproduce this?
i have installed Elastic search using docker on ES 8 and server I am using eck-operator helm chart.

also, I have disabled tls using rejectUnauthorized: false in configuration.

[williamrandolph]

I used the .zip archive on MacOS. I'll try the docker image.

[rishabh-mmc]

@williamrandolph any update here?

[jpmat296]

I have faced similar error message with Elasticsearch 8.11.3.

I'm able to reproduce the exact same error as @rishabh-mmc. Please find attached the 3 commands to execute in Dev Tools : dev_tools.txt

[rishabh-mmc]

@williamrandolph @jpmat296 what are next steps here as this is reproduced. we are using op key in our project and this is impacting out functionality thus not able to upgrade to ES 8.