upload to remote hdfs with webhdfs failed from host which hasn't been installed with hdaoop about webhdfs HOT 3 CLOSED

const WebHDFS = require('webhdfs')

var hdfs = WebHDFS.createClient({
  user:'guoqiang',
  //host:'127.0.0.1',
  //port:'50070',
  //path:''
}, {
  headers: {
    Authorization: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MS"
  }
});

const localFilePath = "/home/guoqiang/Downloads/udisk";
const remoteFilePath = "/home/guoqiang/test4"

var upload_hdfs = function(){
  hdfs.exists(remoteFilePath, function (err, exist) {
    function callback(err) {
      if (err){
        console.log("task failed " + err)
      }
      else{
        console.log("ok")
      }
    }
    if(err){console.log('error '+ err)}
    if (exist) {
      console.log("append")
      hdfs.appendFile(remoteFilePath, localFilePath, callback);
    }else {
      console.log("write")
      hdfs.writeFile(remoteFilePath, localFilePath, callback);
    }
  });
}

upload_hdfs();  

var hdfs = WebHDFS.createClient({
  user:'guoqiang',
  host:'192.168.1.90',
  //port:'50070',
  //path:''
}, {
  headers: {
    Authorization: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MS"
  }
});

error true
write
task failed Error: connect ECONNREFUSED 127.0.0.1:50075