[jira] [Comment Edited] (GUACAMOLE-384) Guacd crashes in buffer.c during stress test

["Michael Jumper (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GUACAMOLE-384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16175286#comment-16175286 ] 

Michael Jumper edited comment on GUACAMOLE-384 at 9/22/17 6:16 AM:
-------------------------------------------------------------------

{quote}
... Our stress test for rdp works great, so I am thinking this is something
in the ssh support. ...
{quote}

Definitely, yes. The code where you're seeing this is the common terminal
implementation shared by SSH and telnet. The other protocols like RDP and
VNC would be unaffected.



was (Author: mike.jumper):
On Sep 21, 2017 11:55, "Phillip Arcuri (JIRA)" <ji...@apache.org> wrote:


... Our stress test for rdp works great, so I am thinking this is something
in the ssh support. ...


Definitely, yes. The code where you're seeing this is the common terminal
implementation shared by SSH and telnet. The other protocols like RDP and
VNC would be unaffected.


> Guacd crashes in buffer.c during stress test 
> ---------------------------------------------
>
>                 Key: GUACAMOLE-384
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-384
>             Project: Guacamole
>          Issue Type: Bug
>          Components: Terminal
>    Affects Versions: 0.9.12-incubating
>         Environment: GNU/Linux x86_64
>            Reporter: Phillip Arcuri
>            Priority: Blocker
>
> In a stress test we kick off an SSH session every second.  The session does a minimal amount of work and exits after a few seconds.  A ps -ef shows we have 2 to 6 instances running at one time.  About 1 in 10 of the instances cores with corrupted buffer data at line buffer.c:108.:
> (gdb) p *buffer
> $2 = {default_character = {value = -1269703408, attributes = {bold = 170, reverse = 42, cursor = false, underscore = false, foreground = 0,
>       background = 0}, width = -1269422328}, rows = 0x2aaab456fa30, top = 686, length = 0, available = 686}
> As an aside I also see roughly 1 in 100 instances become a zombie process hung in pthread_join.  Doubt that is related, but thought I'd mention it.
> This is a blocker for our deployment of a guacamole-enabled feature-set.



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