Nodejs elasticsearch index method insert data Error: Request error, retrying

I use nodejs insert data to elasticsearch!

Error: Request error, retrying
POST http://192.168.2.69:9527/hexinprofit/_doc/40153368 => connect ENOBUFS 192.168.2.69:9527 - Local (undefined:undefined)
at Log.error (E:\hexinwork\hexinnode\node_modules_elasticsearch@16.5.0@elasticsearch\src\lib\log.js:239:56)
at checkRespForFailure (E:\hexinwork\hexinnode\node_modules_elasticsearch@16.5.0@elasticsearch\src\lib\transport.js:298:18)
at HttpConnector. (E:\hexinwork\hexinnode\node_modules_elasticsearch@16.5.0@elasticsearch\src\lib\connectors\http.js:171:7)
at ClientRequest.wrapper (E:\hexinwork\hexinnode\node_modules_lodash@4.17.15@lodash\lodash.js:4929:19)
at ClientRequest.emit (events.js:182:13)
at Socket.socketErrorListener (_http_client.js:382:9)
at Socket.emit (events.js:182:13)
at emitErrorNT (internal/streams/destroy.js:82:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
at process._tickCallback (internal/process/next_tick.js:63:19)

I don't know what happened!!!