Dear X2go-users,
for almost 2 years we are using X2GO with VirtualGL to provides visualization tool on our computing facility and it is very efficient tool. However, we are facing a problem with our current setup that seems related to the number of users connected.
We have a machine built on a Dell R730 server (40 cores, 512 GB, Quadro P2000) installed on Centos 7. X2go is installed from EPEL repository, in version 4.0.1.22
For about one month, establishing the connection is very slow. As you can see in the log file below, it waits two minutes before to start a first session (lpouillo-1103-1526465870_stDXFCE_dp24) that does not seem to work then create a second one about 10 minutes later(C-lpouillo-1159-1527588238_stDXFCE_dp24)
This error seems correlated with the number of active users, including pts (when it is > 80) but I don't see any limits (max pty, max open files, or in x2goserver.conf which is the one by default) that is reached.
Do you have any idea on how to diagnose/solve the problem ? Tell me if you need more information.
Best regards,
Laurent Pouilloux
Ex : May 29 11:54:14 visu systemd-logind: New session 17176 of user lpouillo. May 29 11:54:14 visu systemd: Started Session 17176 of user lpouillo. May 29 11:54:14 visu systemd: Starting Session 17176 of user lpouillo. May 29 11:56:10 visu /usr/bin/x2gosuspend-session: x2gosuspend-session called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 11:56:11 visu /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: lpouillo-1103-1526465870_stDXFCE_dp24 pre-suspend May 29 11:56:11 visu /usr/bin/x2goumount-session[136078]: x2goumount-session has been called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 11:56:30 visu /usr/bin/x2gosuspend-session: x2gosuspend-session called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 11:56:30 visu /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: lpouillo-1103-1526465870_stDXFCE_dp24 pre-suspend May 29 11:56:31 visu /usr/bin/x2goumount-session[138594]: x2goumount-session has been called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 11:56:50 visu /usr/bin/x2gosuspend-session: x2gosuspend-session called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 11:56:50 visu /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: lpouillo-1103-1526465870_stDXFCE_dp24 pre-suspend May 29 11:56:50 visu /usr/bin/x2goumount-session[141127]: x2goumount-session has been called with options: lpouillo-1103-1526465870_stDXFCE_dp24 May 29 12:04:00 visu /usr/bin/x2gostartagent: successfully started X2Go agent session with ID lpouillo-1159-1527588238_stDXFCE_dp24 May 29 12:04:02 visu /usr/bin/x2gomountdirs[514]: successfully mounted lpouillo@127.0.0.1:61406/home/lpouillo/SRC to /tmp/.x2go-lpouillo/media/disk/_home_lpouillo_SRC May 29 12:04:02 visu /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/lmfa/lpouillo/.x2go/C-lpouillo-1159-1527588238_stDXFCE_dp24/keyboard May 29 12:04:03 visu /usr/bin/x2gomountdirs[514]: successfully mounted lpouillo@127.0.0.1:61406/home/lpouillo/.x2go/S-lpouillo-1159-1527588238_stDXFCE_dp24/spool to /tmp/.x2go-lpouillo/spool/C-lpouillo-1159-1527588238_stDXFCE_dp24
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