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https://issues.apache.org/jira/browse/GUACAMOLE-414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16497798#comment-16497798
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Nick Couchman commented on GUACAMOLE-414:
-----------------------------------------

{quote}
It would be great if this could be fixed for the July release of Guacamole. Not 
sure if I know enough to help solve the issue but happy to test a version and 
report back results.
{quote}

The list of JIRA issues slated for the 1.0.0 release has been set, and, 
unfortunately, this one is not included.  That said, we've recently discussed a 
different methodology for releases going forward which should make it possible 
to release bug fixes like this in a more rapid fashion than the every 3-6 
months we've been averaging in the past.

But, before we get ahead of ourselves and try to schedule the release, we have 
to actually find a fix for it - it looks like we've confirmed that it is 
related to TLS and libvncclient.  If you're using Docker, the guacd image in 
1.0.0 will swap over to the Debian Stable distribution (instead of CentOS), so 
it's possible, based on previous anecdotes, that this will get better for 
Docker containers once 1.0.0 is released.

For other environments, we have to determine if this is an issue that can 
actually be resolved within guacamole-server, and, if so, how to fix it.  If 
it's something to do with how guacamole-server is calling libvncclient (sounds 
like maybe Mike is on to something there), then it might be something we can 
fix.  If it's a bug in a particular version of libvncclient, then the best 
we'll be able to do is advise building guacamole-server against a particular 
version.  But, all of that has yet to be determined, so there's a bit of work 
to be done, yet, before we can determine if/when this will actually get fixed.

> Certain VNC servers result in disconnection due to TLS errors
> -------------------------------------------------------------
>
>                 Key: GUACAMOLE-414
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-414
>             Project: Guacamole
>          Issue Type: Bug
>          Components: guacamole-server, guacd
>    Affects Versions: 0.9.13-incubating, 0.9.14
>         Environment: unRAID 6.4rc9 Docker container
>            Reporter: Jason Bean
>            Priority: Minor
>
> Connecting to certain VNC servers such as Ubuntu Desktop (all versions I have 
> ever run) and a CentOS based Browser Docker 
> ([https://hub.docker.com/r/consol/centos-xfce-vnc/]) cause frequent TLS 
> errors and consequently disconnections. The errors in the log are as follows:
> {noformat}
> Oct 12 14:54:59 2004ff6050af guacd[8440]: Error reading from TLS: The TLS 
> connection was non-properly terminated..
> Oct 12 14:54:59 2004ff6050af guacd[8440]: read (4: Interrupted system call)
> Oct 12 14:54:59 2004ff6050af guacd[8440]: Error handling message from VNC 
> server.
> Oct 12 14:54:59 2004ff6050af guacd[8440]: Internal VNC client disconnected
> {noformat}



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