<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000;"><div>Hello,<br></div><div><br></div><div>We have some problem to use native X11 of the new slurm version (17.11.5) compiled from source on Debain stretch.<br></div><div>Before we use the plugin spank with no problem on an older version of slurm.<br></div><div><br></div><div>I have first this error <br></div><div><span style="color: #222222; font-family: Arial, Helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;" data-mce-style="color: #222222; font-family: Arial, Helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">"error: X11 forwarding not built in, cannot enable."</span></div><div><span style="color: #222222; font-family: Arial, Helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;" data-mce-style="color: #222222; font-family: Arial, Helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;"><br></span></div><div>After reading different mails,i add <br></div><div><br></div><div>in slurm.conf<br></div><div><br></div><div>PrologFLags=X11<br></div><div><span></span><div> </div><div>and in /etc/ssh/sshd_config (on head login server of the cluster) <br></div><div><br></div><div>X11UseLocalhost=no<br></div><div><br></div><div><br></div><div>The error change and become <br></div><div><br></div><div>X11 connection rejected because of wrong authentication.</div><div><br></div><div><br></div><div>X11Forwarding is working because if i first open a interactive session, and then connect whith ssh -X on the node, the x-application is working fine and displayed on my client computer. <br></div><div><br></div><div>Then I look at .Xauthority file<br></div><div>( first i removed it and recreate a new)<br></div><div><br></div><div>#ssh -X <a>me@cluster</a><br></div><div><br></div><div>#echo $DISPLAY<br></div><div>cluster:11.0<br></div><div><br></div><div>#xauth list<br></div><div>cluster.ips2.u-psud.fr:11 MIT-MAGIC-COOKIE-1 2809a05f53f693e416682f4befa76a39</div><div># <br></div><div>$ srun --pty bash --init-file /etc/profile<br></div><div><br></div><div>me@node4:~$ echo $DISPLAY<br>cluster:11.0<br>#<br></div><div>#$ xauth list<br>node4.ips2.u-psud.fr:11 MIT-MAGIC-COOKIE-1 2809a05f53f693e416682f4befa76a39<br></div><div><br></div><div>###the hostname is now the hostname of the node<br></div><div><br></div><div>me@node4:~$ xeyes<br>X11 connection rejected because of wrong authentication.<br>Error: Can't open display: cluster:11.0<br><div><br></div></div><div>###But if i add :<br></div><div>#<br></div><div>me@node4:~$ xauth add cluster.ips2.u-psud.fr:11 MIT-MAGIC-COOKIE-1 2809a05f53f693e416682f4befa76a39</div><div><br></div><div>#I now can run x-application <br></div><div><br></div><div>Have you an idea of the problem ?<br></div><div><br></div><div>(User login/password authentification of the cluster are done again an Active Directory annuaire with sssd )<br></div><div><br></div><div> <br></div><div><br></div><div><br></div><div><br></div><div><br></div><table class="mceItemTable" width="333"><tbody><tr><td><br></td><td valign="top"><span style="font-size: 10pt; font-family: terminal,monaco;" data-mce-style="font-size: 10pt; font-family: terminal,monaco;"><span style="font-size: 10pt;" data-mce-style="font-size: 10pt;"><b>Philippe GREVET</b><br></span></span><div><span style="font-family: terminal,monaco;" data-mce-style="font-family: terminal,monaco;">philippe.grevet@ips2.universite-paris-saclay.fr</span></div><div><span style="font-size: 10pt" data-mce-style="font-size: 10pt;"><span style="font-family: terminal,monaco;" data-mce-style="font-family: terminal,monaco;">Tel <strong>0169153393</strong> Bureau - 241 Bâtiment -630</span> </span></div><div><span style="font-size: 10pt" data-mce-style="font-size: 10pt;"><span style="font-family: terminal,monaco;" data-mce-style="font-family: terminal,monaco;">http://www.ips2.u-psud.fr/</span></span></div></td></tr></tbody></table><div><br></div><span></span><br></div></div></div></body></html>