network library Client got end-of-stream. error

hi list, I'm playing with arduino yun bridge example

https://www.arduino.cc/en/Tutorial/Bridge.

I wrote this little sketch to turn on and off a led.

import processing.net.*; 
Client myClient; 
String data;
boolean flag=true;
String requestON="/arduino/digital/13/1";
String requestOFF="/arduino/digital/13/0";



void setup() { 
  size(200, 200); 
  frameRate(25);
  // Connect to the local machine at port 5204.
  // This example will not run if you haven't
  // previously started a server on this port.
  myClient = new Client(this, "192.168.1.106", 80); // arduino yun IP 
  myClient.write("GET "+requestON+"  HTTP/1.0\r\n"); // turn on the led
  myClient.write("\r\n");
} 

void draw() { 
  if (frameCount%12==0) {
    if (flag) {
      performRequest(requestON);
    } else {
      performRequest(requestOFF);
    }
    flag=!flag;
  }
/*
  if (myClient.available() > 0) { 
    data = myClient.readString(); // ...then grab it and print it
    println(data);
  }
  */
} 

void stop() {
  myClient.stop();
}


void performRequest(String myRequest) {
  myClient = new Client(this, "192.168.1.106", 80);
  myClient.write("GET "+myRequest+" HTTP/1.0\r\n"); // Use the HTTP "GET" command to ask for a Web page
  myClient.write("\r\n");
}

every cycle i got this error "Client got end-of-stream."

How can avoid this?

Then I have another question, it is correct to close the client on stop?

thanks.