v8.2.0 has broken the Bulk API

🐛 Bug Report

v8.2.0 has broken the Bulk API function.

To Reproduce

Using https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/bulk_examples.html

With package.json:

{
  "dependencies": {
    "@elastic/elasticsearch": "8.2.0",
    "array.prototype.flatmap": "^1.2.5",
    "get-json": "^1.0.1"    
  }
}

run npm init

execute the JavaScript in the documentation

response is:

ResponseError: illegal_argument_exception: [illegal_argument_exception] Reason: The bulk request must be terminated by a newline [\n]
    at SniffingTransport.request (/home/luke/Projects/nfl-elastic-aggregations/es-import/node_modules/@elastic/transport/lib/Transport.js:476:27)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async Client.BulkApi [as bulk] (/home/luke/Projects/nfl-elastic-aggregations/es-import/node_modules/@elastic/elasticsearch/lib/api/api/bulk.js:51:12)
    at async run (/home/luke/Projects/nfl-elastic-aggregations/es-import/javascripts/bulk_example.js:58:24) {
  meta: {
    body: { error: [Object], status: 400 },
    statusCode: 400,
    headers: {
      'x-elastic-product': 'Elasticsearch',
      'content-type': 'application/json;charset=utf-8',
      'content-length': '245'
    },
    meta: {
      context: null,
      request: [Object],
      name: 'elasticsearch-js',
      connection: [Object],
      attempts: 0,
      aborted: false
    },
    warnings: [Getter]
  }

Deleting the node_modules folder, pinning “@elastic/elasticsearch” to 8.1.0, running node install and running the JavaScript again results in a successful call with the response being:

{
  count: 5,
  _shards: { total: 1, successful: 1, skipped: 0, failed: 0 }
}

To double check the node_modules folder was deleted and 8.2.0 was used again resulting in the same error as before.

Your Environment

• node version: v16.15.0
• @elastic/elasticsearch version: 8.2.0
• os: Ubuntu 20.04 host with Elasticsearch docker image being used

[delvedor]

Hello! We can’t release an “official” patch release yet, as the client must follow the Stack release versioning. However, we have released a custom patch version just for v8.2.0 to unblock you as quickly as possible. You should expect to see a definitive v8.2.1 in a few days. https://www.npmjs.com/package/@elastic/elasticsearch/v/8.2.0-patch.1

You can install it by running npm i @elastic/elasticsearch, make sure that the version installed is 8.2.0-patch.1.

[Jeffrey-Zutt]

We experience the same issue. Rolling back to 8.1.0 resolves it for now