Exception in thread "main" java.awt.AWTError: Can't connect to X11 window server

Gatling (Open-Source)
1

Hello,
I am new to gatling and when I run recorder.sh script I got an error .

GATLING_HOME is set to /home/shivam/Downloads/gatling-charts-highcharts-bundle-3.5.1
No protocol specified
Exception in thread “main” java.awt.AWTError: Can’t connect to X11 window server using ‘:0’ as the value of the DISPLAY variable.
at java.desktop/sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at java.desktop/sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:102)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.awt.X11GraphicsEnvironment.(X11GraphicsEnvironment.java:61)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:315)
at java.desktop/java.awt.GraphicsEnvironment$LocalGE.createGE(GraphicsEnvironment.java:101)
at java.desktop/java.awt.GraphicsEnvironment$LocalGE.(GraphicsEnvironment.java:83)
at java.desktop/java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:129)
at java.desktop/java.awt.Window.initGC(Window.java:487)
at java.desktop/java.awt.Window.init(Window.java:507)
at java.desktop/java.awt.Window.(Window.java:448)
at java.desktop/java.awt.Frame.(Frame.java:449)
at java.desktop/java.awt.Frame.(Frame.java:407)
at java.desktop/javax.swing.JFrame.(JFrame.java:204)
at scala.swing.Frame$$anon$1.(RichWindow.scala:82)
at scala.swing.Frame.peer$lzycompute(RichWindow.scala:82)
at scala.swing.Frame.peer(RichWindow.scala:82)
at scala.swing.Frame.peer(RichWindow.scala:81)
at scala.swing.UIElement$.scala$swing$UIElement$$cache(UIElement.scala:25)
at scala.swing.UIElement.$init$(UIElement.scala:83)
at scala.swing.Window.(Window.scala:28)
at scala.swing.Frame.(RichWindow.scala:81)
at scala.swing.MainFrame.(MainFrame.scala:19)
at io.gatling.recorder.ui.swing.frame.ConfigurationFrame.(ConfigurationFrame.scala:48)
at io.gatling.recorder.ui.swing.SwingFrontEnd.configurationFrame$lzycompute(SwingFrontEnd.scala:34)
at io.gatling.recorder.ui.swing.SwingFrontEnd.configurationFrame(SwingFrontEnd.scala:34)
at io.gatling.recorder.ui.swing.SwingFrontEnd.init(SwingFrontEnd.scala:101)
at io.gatling.recorder.controller.RecorderController.(RecorderController.scala:48)
at io.gatling.recorder.GatlingRecorder$.initRecorder(GatlingRecorder.scala:40)
at io.gatling.recorder.GatlingRecorder$.$anonfun$fromArgs$1(GatlingRecorder.scala:32)
at scala.Option.map(Option.scala:242)
at io.gatling.recorder.GatlingRecorder$.fromArgs(GatlingRecorder.scala:32)
at io.gatling.recorder.GatlingRecorder$.main(GatlingRecorder.scala:28)
at io.gatling.recorder.GatlingRecorder.main(GatlingRecorder.scala)

Can anyone point me why I am getting this error and how can I fix this. Thank you.

2

Hello Shivam,

recorder.sh is a script to launch the recorder: a graphical interface application.

When starting, it tries to detect X11 protocol to use and cannot connect.

Possible common causes:

  • different users between your shell and your graphical session
  • trying to launch the application on a remote server without graphical packages
  • using the script inside a docker container without passing X11 access

This issue is not directly related to gatling, but how you launch it.
Try with common tools: xeyes for instance

Cheers!