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I'm building a node application that creates a virtual browser (in docker) by streaming firefox window using xvfb, openbox and ffmpeg through WRTC. I'm using a docker container node:12.14-slim with the bare minimum installed on it.

I'm currently spawning (with shell) xdotool - with the DISPLAY variable in the environment and sending commands to the stdin of the spawn.

I keep running into an issue where xdotool will quit. The output shows:

debug [xdotool](824): stdin mousemove 1013 308
debug [xdotool](824): stdin mousemove 1014 308
debug [xdotool](824): stdin mousemove 1015 308
debug [xdotool](824): stdin mousemove 1015 308
debug [xdotool](824): stdin mousedown 1
debug [xdotool](824): stderr X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  132 (XTEST)
  Minor opcode of failed request:  2 (X_XTestFakeInput)
  Value in failed request:  0x0
  Serial number of failed request:  3426
  Current serial number in output stream:  3427

debug [xvfb](717): stderr AUDIT: Sat Jan  4 23:13:57 2020: 718: client 2 disconnected

debug [xdotool](824): exited (1) null
debug [xdotool](824): exited (1) null

I'm not an expert by any means, I'm not sure if this is a xdotool problem or an X problem, any help would be much appreciated.

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