Discussion:
Need help with debugging tmux crash
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Ankit Sharda
2015-05-18 06:03:11 UTC
Permalink
Hello,

We have a CentOS 6.5 server that we use as a development server for around
15-20 users. Most of these users use tmux as a part of their development
work. A particular user is experiencing an issue where his tmux sessions
get terminated for no reason. No core files are generated.

- How can I go about troubleshooting this ? Is there somethingthat I could
enable/install for debugging tmux crashes ?

We are currently running tmux version 1.8

Any help would be appreciated.
--
Ankit Sharda

Systems Administrator
Utrade Solutions Pvt Ltd
Thomas Adam
2015-05-19 08:17:19 UTC
Permalink
Post by Ankit Sharda
Hello,
We have a CentOS 6.5 server that we use as a development server for around
15-20 users. Most of these users use tmux as a part of their development
work. A particular user is experiencing an issue where his tmux sessions
get terminated for no reason. No core files are generated.
- How can I go about troubleshooting this ? Is there somethingthat I could
enable/install for debugging tmux crashes ?
pkill tmux ; tmux -vvvvv

And send through the tmux-server-*.log in the CWD.
Post by Ankit Sharda
We are currently running tmux version 1.8
That's too old. We've fixed a tonne of bugs since then. Please try and
reproduce this with tmux 2.0 or better yet tmux from git.

-- Thomas Adam
Nicholas Marriott
2015-05-19 08:19:39 UTC
Permalink
Hi

You could run with -vvv and see if there is anything in the logs.

Make sure cores aren't turned off (ulimit -c).

But it may be fixed in later versions anyway.
Post by Ankit Sharda
Hello,
We have a CentOS 6.5 server that we use as a development server for around
15-20 users. Most of these users use tmux as a part of their development
work. A particular user is experiencing an issue where his tmux sessions
get terminated for no reason. No core files are generated.
- How can I go about troubleshooting this ?** Is there somethingthat I
could enable/install for debugging tmux crashes ?
We are currently running tmux version 1.8
Any help would be appreciated.
--
Ankit Sharda
Systems Administrator
Utrade Solutions Pvt Ltd
------------------------------------------------------------------------------
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Performance metrics, stats and reports that give you Actionable Insights
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_______________________________________________
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Nicholas Marriott
2015-05-19 08:45:51 UTC
Permalink
It probably means it is coring but the core isn't showing up for some
reason.
Hi.
cores are enabled but they do not generate.
Here is a snaphsot of the last lines in the log (that I had captured
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '5' ground
input_parse: '3' ground
input_parse: '7' ground
input_parse: '.' ground
input_parse: '8' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '4' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '5' ground
input_parse: '3' ground
input_parse: '8' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '1' ground
input_parse: '9' ground
input_parse: '6' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '5' ground
input_parse: '3' ground
input_parse: '8' ground
input_parse: '.' ground
input_parse: '0' ground
input_parse: '5' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '1' ground
input_parse: '5' ground
input_parse: '7' ground
input_parse: ' ' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '0' ground
input_parse: ' ' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '0' ground
input_parse: ' ' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '0' ground
input_parse: ' ' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '0' ground
input_parse: ' ' ground
input_parse: '|' ground
input_parse: ' ' ground
' groundrse: '
input_c0_dispatch: '
input_parse: '
' ground
input_c0_dispatch: '
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: 'E' ground
input_parse: 'S' ground
input_parse: 'M' ground
input_parse: 'N' ground
input_parse: 'S' ground
input_parse: 'E' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '1' ground
input_parse: '3' ground
input_parse: '3' ground
input_parse: '4' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '9' ground
input_parse: '9' ground
input_parse: '1' ground
input_parse: '.' ground
input_parse: '6' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '9' ground
input_parse: '9' ground
input_parse: '1' ground
input_parse: '.' ground
input_parse: '6' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '2' ground
input_parse: '8' ground
input_parse: '|' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: ' ' ground
input_parse: '9' ground
input_parse: '9' ground
input_parse: '1' ground
input_parse: '.' ground
input_parse: '1' ground
input_parse: '5' ground
-Does this mean anything ?
-I'll try and upgrade to tmux 2.0...
On Tue, May 19, 2015 at 1:49 PM, Nicholas Marriott
Hi
You could run with -vvv and see if there is anything in the logs.
Make sure cores aren't turned off (ulimit -c).
But it may be fixed in later versions anyway.
** ** Hello,
** ** We have a CentOS 6.5 server that we use as a development server
for around
** ** 15-20 users. Most of these users use tmux as a part of their
development
** ** work. A particular user is experiencing an issue where his tmux
sessions
** ** get terminated for no reason. No core files are generated.
** ** - How can I go about troubleshooting this ?** Is there
somethingthat I
** ** could enable/install for debugging tmux crashes ?
** ** We are currently running tmux version 1.8
** ** Any help would be appreciated.
** ** --
** ** Ankit Sharda
** ** Systems Administrator
** ** Utrade Solutions Pvt Ltd
------------------------------------------------------------------------------
One dashboard for servers and applications across
Physical-Virtual-Cloud
Widest out-of-the-box monitoring support with 50+ applications
Performance metrics, stats and reports that give you Actionable
Insights
Deep dive visibility with transaction tracing using APM Insight.
[2]http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
_______________________________________________
tmux-users mailing list
[4]https://lists.sourceforge.net/lists/listinfo/tmux-users
--
Ankit Sharda
Senior Systems Administrator
Utrade Solutions Pvt Ltd
References
Visible links
2. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
4. https://lists.sourceforge.net/lists/listinfo/tmux-users
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