X2Go Bug report logs - #1166
x2goclient terminates with "WARNING: failed to kill process group '<pid>': No such process

Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: Seth Galitzer <sgsax@ksu.edu>

Date: Mon, 27 Mar 2017 19:05:01 UTC

Severity: normal

Tags: not-a-bug

Done: Mihai Moldovan <ionic@ionic.de>

Bug is archived. No further changes may be made.

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Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1166; Package x2goclient. (Mon, 27 Mar 2017 19:05:01 GMT) (full text, mbox, link).


Acknowledgement sent to Seth Galitzer <sgsax@ksu.edu>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>.

Your message had a Version: pseudo-header with an invalid package version:

4.1.0.0 and 4.1.0.1

please either use found or fixed to the control server with a correct version, or reply to this report indicating the correct version so the maintainer (or someone else) can correct it for you.

(Mon, 27 Mar 2017 19:05:02 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: Seth Galitzer <sgsax@ksu.edu>
To: <submit@bugs.x2go.org>
Subject: x2goclient terminates with "WARNING: failed to kill process group '<pid>': No such process
Date: Mon, 27 Mar 2017 13:58:37 -0500
Package: x2goclient
Version: 4.1.0.0 and 4.1.0.1

When exiting x2goclient, after a pause of about 2 seconds, the following 
message is displayed to stderr:
WARNING: unable to send SIGTERM to process group '<pid>': No such process

About 10 more seconds later, the following message is displayed to stderr:
WARNING: failed to kill process group '<pid>': No such process

In some cases, the first message is not displayed, but the second one 
always is after about 10-12 seconds. The pid is the same in both message.

This seems to only affect 4.1.x clients. 4.0.x clients do not seem to 
have this behavior.

I have confirmed these results on the following platforms and builds:
Ubuntu 16.04 (xenial): x2goclient 4.1.0.0 
(4.1.0.0-0~1536~ubuntu16.04.1), installed from Launchpad PPA
Ubuntu 16.04 (xenial): x2goclient 4.1.0.1, compiled from source
Ubuntu 15.04 (vivid): x2goclient 4.1.0.0 (4.1.0.0-0~1536~ubuntu15.04.1), 
installed from Launchpad PPA
Ubuntu 15.04 (vivid): x2goclient 4.1.0.1, compiled from source
Debian 8.7 (jessie) 64-bit: x2goclient 4.1.0.1, compiled from source
Debian 8.7 (jessie) 32-bit: x2goclient 4.1.0.1, compiled from source

The following builds and platforms do not appear to be affected:
Ubuntu 16.04 (xenial): x2goclient 4.0.5.1 (4.0.5.1-1), installed from 
official Ubuntu repos
Ubuntu 15.04 (vivid): x2goclient 4.0.3.1 (4.0.3.1-4), installed from 
official Ubuntu repos
Debian 8.7 (jessie) 64-bit: x2goclient 4.0.3.1 (4.0.3.1-4), installed 
from official debian repos
Debian 8.7 (jessie) 32-bit: x2goclient 4.0.3.1 (4.0.3.1-4), installed 
from official debian repos

Seth

-- 
Seth Galitzer
Systems Coordinator
Computing and Information Sciences
Kansas State University
http://www.cis.ksu.edu/~sgsax
sgsax@ksu.edu
785-532-7790


Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1166; Package x2goclient. (Tue, 28 Mar 2017 12:05:02 GMT) (full text, mbox, link).


Acknowledgement sent to Mihai Moldovan <ionic@ionic.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Tue, 28 Mar 2017 12:05:02 GMT) (full text, mbox, link).


Message #10 received at 1166@bugs.x2go.org (full text, mbox, reply):

From: Mihai Moldovan <ionic@ionic.de>
To: Seth Galitzer <sgsax@ksu.edu>, 1166@bugs.x2go.org
Subject: Re: x2goclient terminates with "WARNING: failed to kill process group '<pid>': No such process
Date: Tue, 28 Mar 2017 14:03:11 +0200
[Message part 1 (text/plain, inline)]
Control: close -1
Control: tag -1 not-a-bug

On 27.03.2017 08:58 PM, Seth Galitzer wrote:
> Package: x2goclient
> Version: 4.1.0.0 and 4.1.0.1
> 
> When exiting x2goclient, after a pause of about 2 seconds, the following 
> message is displayed to stderr:
> WARNING: unable to send SIGTERM to process group '<pid>': No such process
> 
> About 10 more seconds later, the following message is displayed to stderr:
> WARNING: failed to kill process group '<pid>': No such process
> 
> In some cases, the first message is not displayed, but the second one 
> always is after about 10-12 seconds. The pid is the same in both message.
> 
> This seems to only affect 4.1.x clients. 4.0.x clients do not seem to 
> have this behavior.

Most of the time, that's perfectly fine and nothing to worry about.

It merely means that x2goclient and its child processes exited cleanly before
the cleanup process could kill them.

If you should ever see stray x2goclient processes left *after* these messages,
then that's something to worry about.



Mihai

[signature.asc (application/pgp-signature, attachment)]

Marked Bug as done Request was from Mihai Moldovan <ionic@ionic.de> to 1166-submit@bugs.x2go.org. (Tue, 28 Mar 2017 12:05:02 GMT) (full text, mbox, link).


Notification sent to Seth Galitzer <sgsax@ksu.edu>:
Bug acknowledged by developer. (Tue, 28 Mar 2017 12:05:02 GMT) (full text, mbox, link).


Added tag(s) not-a-bug. Request was from Mihai Moldovan <ionic@ionic.de> to 1166-submit@bugs.x2go.org. (Tue, 28 Mar 2017 12:05:02 GMT) (full text, mbox, link).


Bug archived. Request was from Debbugs Internal Request <owner@bugs.x2go.org> to internal_control@bugs.x2go.org. (Wed, 26 Apr 2017 05:24:01 GMT) (full text, mbox, link).


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