User-Agent:       Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/55.0.2883.75 Safari/537.36
Build Identifier: 

vncserver allows connection from vncviewer at the first time, but immediately
terminates connection from second attempt on.

Logging in on 42.2 system from my local machine and starting vncserver:

henning@deepthought:~> ssh -L 6100:localhost:6100 host113
Password: 
Last login: Sat Jan 28 11:08:05 2017 from <redacted>
Have a lot of fun...
henning@host113:~> vncserver -geometry 1280x720 :200

New 'host113:200 (henning)' desktop is host113:200

Starting applications specified in /home/henning/.vnc/xstartup
Log file is /home/henning/.vnc/host113:200.log




First connection from local machine works:
henning@deepthought:~> vncviewer localhost:6100
Connected to RFB server, using protocol version 3.8
Performing standard VNC authentication
Password: 
Authentication successful
Desktop name "host113:200 (henning)"
VNC server default format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-16-*-*-*-*-*-*-*" to
type FontStruct
Using default colormap which is TrueColor.  Pixel format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Same machine: preferring raw encoding

Second connection attempt:

henning@deepthought:~> vncviewer localhost:6100
Connected to RFB server, using protocol version 3.8
Performing standard VNC authentication
Password: 
Authentication successful
Desktop name "host113:200 (henning)"
VNC server default format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-16-*-*-*-*-*-*-*" to
type FontStruct
Using default colormap which is TrueColor.  Pixel format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Same machine: preferring raw encoding
vncviewer: VNC server closed connection


I will attach server log.

Reproducible: Always

Steps to Reproduce:
1. vncserver -geometry 1280x720 :200
2. vncviewer localhost:6100
3. vncviewer localhost:6100
Actual Results:  
Connected to RFB server, using protocol version 3.8
Performing standard VNC authentication
Password: 
Authentication successful
Desktop name "host113:200 (henning)"
VNC server default format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-16-*-*-*-*-*-*-*" to
type FontStruct
Using default colormap which is TrueColor.  Pixel format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Same machine: preferring raw encoding
vncviewer: VNC server closed connection


Expected Results:  
Connected to RFB server, using protocol version 3.8
Performing standard VNC authentication
Password: 
Authentication successful
Desktop name "host113:200 (henning)"
VNC server default format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-16-*-*-*-*-*-*-*" to
type FontStruct
Using default colormap which is TrueColor.  Pixel format:
  32 bits per pixel.
  Least significant byte first in each pixel.
  True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
Same machine: preferring raw encoding