Elasticsearch。错误：＆＃x27; content-type标头丢失了＆＃x27;

Question

在AWS Elasticsearch v6.7上使用。为了使用ES使用库进行

 "@elastic/elasticsearch": "^6.8.8",

连接到ES使用库：

    "aws-elasticsearch-js": "^1.0.3",
    

连接没有任何类型的错误，我通过client.cluster.cluster.health（{}）对其进行了检查。 当我将请求发送到弹性时，我会收到此错误：

{
2022-06-09T13:30:49.589491939Z   meta: {
2022-06-09T13:30:49.589499754Z     body: { error: 'Content-Type header is missing', status: 406 },
2022-06-09T13:30:49.589508230Z     statusCode: 406,
2022-06-09T13:30:49.589516335Z     headers: {
2022-06-09T13:30:49.589523800Z       date: 'Thu, 09 Jun 2022 13:30:49 GMT',
2022-06-09T13:30:49.589531895Z       'content-type': 'application/json; charset=UTF-8',
2022-06-09T13:30:49.589540211Z       'content-length': '55',
2022-06-09T13:30:49.589548456Z       connection: 'keep-alive',
2022-06-09T13:30:49.589556442Z       'access-control-allow-origin': '*'
2022-06-09T13:30:49.589564667Z     },
2022-06-09T13:30:49.589572222Z     warnings: null,
2022-06-09T13:30:49.589580247Z     meta: {
2022-06-09T13:30:49.589587831Z       context: null,
2022-06-09T13:30:49.589595736Z       request: {
2022-06-09T13:30:49.589603151Z         params: {
2022-06-09T13:30:49.589610985Z           method: 'POST',
2022-06-09T13:30:49.589618951Z           path: '/api-index/_search',
2022-06-09T13:30:49.589629831Z           body: '<HUGE REQUESRT>',
2022-06-09T13:30:49.589649769Z           querystring: 'from=0&size=20',
2022-06-09T13:30:49.589658326Z           headers: {
2022-06-09T13:30:49.589668395Z             'User-Agent': 'elasticsearch-js/6.8.8 (linux 5.13.0-48-generic-x64; Node.js v16.15.0)',
2022-06-09T13:30:49.589681500Z             'Content-Type': 'application/json',
2022-06-09T13:30:49.589703652Z             'Content-Length': '971'
2022-06-09T13:30:49.589712749Z           },
2022-06-09T13:30:49.589720554Z           timeout: 30000
2022-06-09T13:30:49.589728680Z         },
2022-06-09T13:30:49.589736384Z         options: {
2022-06-09T13:30:49.589745772Z           headers: { 'Content-Type': 'application/json' },
2022-06-09T13:30:49.589757514Z           warnings: null
2022-06-09T13:30:49.589768034Z         },
2022-06-09T13:30:49.589778705Z         id: 8
2022-06-09T13:30:49.589789325Z       },
2022-06-09T13:30:49.589799224Z       name: 'elasticsearch-js',
2022-06-09T13:30:49.589810044Z       connection: {
2022-06-09T13:30:49.589820344Z         url: '<AWS_ES_URL>',
2022-06-09T13:30:49.589831866Z         id: '<AWS_ES_URL>',
2022-06-09T13:30:49.589843258Z         headers: {},
2022-06-09T13:30:49.589853748Z         deadCount: 0,
2022-06-09T13:30:49.589864799Z         resurrectTimeout: 0,
2022-06-09T13:30:49.589875569Z         _openRequests: 0,
2022-06-09T13:30:49.589886239Z         status: 'alive',
2022-06-09T13:30:49.589896579Z         roles: { master: true, data: true, ingest: true, ml: false }
2022-06-09T13:30:49.589908782Z       },
2022-06-09T13:30:49.589918832Z       attempts: 0,
2022-06-09T13:30:49.589928911Z       aborted: false
2022-06-09T13:30:49.589939952Z     }
2022-06-09T13:30:49.589950211Z   }
2022-06-09T13:30:49.589960531Z }

从错误描述中，我看到主要错误是content-type-header缺少。但是，作为他们的同时，我在请求中看到了元数据'content-type'：'application/json'，。 这个问题仅在ES v6.7发生。对于本地开发，我使用v7.2并成功起作用。 我不知道为什么ES Engine 6.7无法解析此标头。请帮助我，如果您遇到了同样的问题。