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List:       ltsp-discuss
Subject:    Re: [Ltsp-discuss] LTSP fat client freeze
From:       Dashamir Hoxha <dashohoxha () gmail ! com>
Date:       2019-03-02 9:51:28
Message-ID: CAMucfLy-xXb0Zd-Db0iYZfQp9sBaBXrn1Qyh_p5VwWgbU5M=gg () mail ! gmail ! com
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On Mon, Feb 25, 2019 at 3:47 PM Maxime Accadia <
maxime.accadia@univ-grenoble-alpes.fr> wrote:

> Hi,
>
> Just to share an experience. We had to debug a freezing on fat clients :
> on 18.04, Gnome was freezing after 10min inactivity.
>
> Usually, freezing is caused when NBD connection is lost ; it wasn't the
> case.
>
> Relation to inactivity suggested an issue with suspend / screensaver. So
> we disabled suspend, as did Alkis in a recent commit (
> https://git.launchpad.net/ltsp/commit/?id=dc8fb26f26989f28c36ae69b1684adc63afb1640).
> The issue remained.
>
> Nothing in logs, both on client and server. It turned out it was sshfs
> hanging ; probably due to a timeout on a stateful firewall. When sshfs
> hangs in this way, there is no error.
>
> The solution was to use LDM_SSHOPTIONS="-o ServerAliveInterval=30" in
> lts.conf as recommended here :
> https://github.com/smheidrich/sshfs/blob/master/sshfs.rst#sshfs-hangs


Do you think this should be a default LDM configuration?
Or it just happens in certain cases, and anyway it is just a workaround and
some day may not be needed?

Thanks,
Dashamir


>
>
> Best,
>
> Maxime
>
>
> _____________________________________________________________________
> Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
>       https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> For additional LTSP help,   try #ltsp channel on irc.freenode.net
>

[Attachment #5 (text/html)]

<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" \
class="gmail_attr">On Mon, Feb 25, 2019 at 3:47 PM Maxime Accadia &lt;<a \
href="mailto:maxime.accadia@univ-grenoble-alpes.fr">maxime.accadia@univ-grenoble-alpes.fr</a>&gt; \
wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px \
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br> <br>
Just to share an experience. We had to debug a freezing on fat clients : on 18.04, \
Gnome was freezing after 10min inactivity.<br> <br>
Usually, freezing is caused when NBD connection is lost ; it wasn&#39;t the case.<br>
<br>
Relation to inactivity suggested an issue with suspend / screensaver. So we disabled \
suspend, as did Alkis in a recent commit (<a \
href="https://git.launchpad.net/ltsp/commit/?id=dc8fb26f26989f28c36ae69b1684adc63afb1640" \
rel="noreferrer" target="_blank">https://git.launchpad.net/ltsp/commit/?id=dc8fb26f26989f28c36ae69b1684adc63afb1640</a>). \
The issue remained.<br> <br>
Nothing in logs, both on client and server. It turned out it was sshfs hanging ; \
probably due to a timeout on a stateful firewall. When sshfs hangs in this way, there \
is no error.<br> <br>
The solution was to use LDM_SSHOPTIONS=&quot;-o ServerAliveInterval=30&quot; in \
lts.conf as recommended here : <a \
href="https://github.com/smheidrich/sshfs/blob/master/sshfs.rst#sshfs-hangs" \
rel="noreferrer" target="_blank">https://github.com/smheidrich/sshfs/blob/master/sshfs.rst#sshfs-hangs</a></blockquote><div><br></div><div>Do \
you think this should be a default LDM configuration?</div><div>Or it just happens in \
certain cases, and anyway it is just a workaround and some day may not be \
needed?</div><div><br></div><div>Thanks,</div><div>Dashamir</div><div>  \
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px \
solid rgb(204,204,204);padding-left:1ex"><br> <br>
Best,<br>
<br>
Maxime<br>
<br>
<br>
_____________________________________________________________________<br>
Ltsp-discuss mailing list.     To un-subscribe, or change prefs, goto:<br>
         <a href="https://lists.sourceforge.net/lists/listinfo/ltsp-discuss" \
rel="noreferrer" target="_blank">https://lists.sourceforge.net/lists/listinfo/ltsp-discuss</a><br>
 For additional LTSP help,     try #ltsp channel on <a href="http://irc.freenode.net" \
rel="noreferrer" target="_blank">irc.freenode.net</a><br> </blockquote></div></div>





_____________________________________________________________________
Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
      https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
For additional LTSP help,   try #ltsp channel on irc.freenode.net


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