[X2Go-User] x2go server closes the inactive connection and not possible to connect again
Pongracz Istvan
pongracz.istvan at gmail.com
Tue Mar 6 19:50:52 CET 2018
In additional, here you can see the installed nx packages:
ii libnx-x11-6:i386
2:3.5.99.14-0~816~ubuntu16.04.1 i386 nxagent's
libNX_X11 client-part library
ii nx-x11-common
2:3.5.99.14-0~816~ubuntu16.04.1 all nx-X11 (common
files)
ii nxagent
2:3.5.99.14-0~816~ubuntu16.04.1 i386 Nested Xserver
(aka NX Agent) supporting the NX compression protocol
ii nxproxy
2:3.5.99.14-0~816~ubuntu16.04.1 i386 NX proxy
2018-03-06 19:09 GMT+01:00 Pongrácz István <pongracz.istvan at gmail.com>:
> Hi,
>
> I use x2go successfully for several years and I very like it, thank you!
>
> I have a problem with the latest x2go (http://ppa.launchpad.net/
> x2go/stable/ubuntu xenial main).
> I can login without problem to the server, working as expected, but when I
> do not work on the x2go session (inactive or idle), the server closes the
> connection and it is not possible to connect again.
> Before the upgrade I had open sessions for days.
>
> Any idea? Below the technical details.
>
> *The client debug shows (short version):*
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2089> Forwarding parameters: from remote ("localhost":49454) to local ("localhost":49788)
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2126> Temporary session port after config file parse: 49454
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2130> Temporary session host after config file parse: localhost
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2160> New channel forwarded.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2320> "ssh_channel_write failed": "Remote channel is closed"
>
> x2go-DEBUG-../src/sshprocess.cpp:472> I/O error: "ssh_channel_write failed."" - Remote channel is closed" (2).
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2363> EOF sent.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2367> Channel closed.
>
> x2go-DEBUG-../src/onmainwindow.cpp:6459> Proxy wrote on stderr: "Loop: PANIC! The remote NX proxy closed the connection.
>
> Error: The remote NX proxy closed the connection.
>
> "
>
> x2go-DEBUG-../src/onmainwindow.cpp:6459> Proxy wrote on stderr: "Loop: PANIC! Failure negotiating the session in stage '7'.
>
> Error: Failure negotiating the session in stage '7'.
>
> Loop: PANIC! Wrong version or invalid session authentication cookie.
>
> Error: Wrong version or invalid session authentication cookie.
>
>
> So, on the server side the port 49454 did not exist and even on the server
> I can see the session running (with ps ax), it is not possible to connect
> (The remote NX proxy closed the connection....))
>
> I did not find fresh or relevant information on the net, I spent about 2
> days to figure out, but without success (purge, reinstall, xsession
> removing etc. - all done, without results)
>
> *On the server, the sshd log contains this relevant information (it is the
> pair of the client debug log above):*
>
> Mar 5 19:45:11 localhost sshd[19999]: Accepted publickey for xxxx from YYYYY.98 port 43002 ssh2: RSA SHA256:notrelevant
>
> Mar 5 19:45:11 localhost sshd[19999]: pam_unix(sshd:session): session opened for user username by (uid=0)
>
> Mar 5 19:45:11 localhost systemd-logind[787]: New session 9 of user username.
>
> Mar 5 19:45:22 localhost su[20438]: Successful su for username by root
>
> Mar 5 19:45:22 localhost su[20438]: + ??? root:username
>
> Mar 5 19:45:22 localhost su[20438]: pam_unix(su:session): session opened for user username by (uid=0)
>
> Mar 5 19:45:22 localhost systemd-logind[787]: New session c1 of user username.
>
> Mar 5 19:45:22 localhost su[20438]: pam_unix(su:session): session closed for user username
>
> Mar 5 19:45:22 localhost su[20492]: Successful su for username by root
>
> Mar 5 19:45:22 localhost systemd-logind[787]: Removed session c1.
>
> Mar 5 19:45:22 localhost su[20492]: + ??? root:username
>
> Mar 5 19:45:22 localhost su[20492]: pam_unix(su:session): session opened for user username by (uid=0)
>
> Mar 5 19:45:22 localhost systemd-logind[787]: New session c2 of user username.
>
> Mar 5 19:45:24 localhost su[20492]: pam_unix(su:session): session closed for user username
>
> Mar 5 19:45:24 localhost systemd-logind[787]: Removed session c2.
>
> Mar 5 19:45:25 localhost sshd[3615]: pam_unix(sshd:session): session closed for user username
>
> Mar 5 19:45:29 localhost sshd[20011]: error: connect_to localhost port 49454: failed.
>
> Mar 5 19:45:29 localhost sshd[20011]: channel_by_id: 0: bad id: channel free
>
> Mar 5 19:45:29 localhost sshd[20011]: Disconnecting: Received ieof for nonexistent channel 0.
>
> Mar 5 19:45:29 localhost sshd[19999]: pam_unix(sshd:session): session closed for user username
>
> Mar 5 19:45:29 localhost systemd-logind[787]: Removed session 9.
>
>
> *The x2go server log from the syslog:*
> Here is the session opened first time, successfully, you can see the agent
> port (49454):
> Mar 5 18:31:11 localhost /usr/bin/x2gostartagent: creating new session:
> username-50-1520271069_stDMATE_dp24 2a3a4f78ebac6c1318558ebfebbffff1 3799
> YYYY.98 49454 49455 49456 -1 -1
>
> In the syslog I did not find any related information about nxagent
> closing, but only the unsuccessful reconnect after 1 hour and 14 minutes.
> First reconnect, I was able to see the session selector window and I saw
> the session as running state, but I had only Suspend and Terminate buttons
> active. I pushed the suspend and resume, problem occurred.
>
> *Here are the packages on the server:*
>
> ii cups-x2go 3.0.1.3-1 all Virtual X2Go printer for CUPS
>
> ii libx2go-log-perl 4.1.0.0-0~1517~ubuntu16.04.1 all Perl X2Go::Log package
>
> ii libx2go-server-db-perl 4.1.0.0-0~1517~ubuntu16.04.1 i386 Perl X2Go::Server:DB package
>
> ii libx2go-server-perl 4.1.0.0-0~1517~ubuntu16.04.1 all Perl X2Go::Server package
>
> rc x2goagent 2:3.5.0.33-0~710~ubuntu16.04.1 all X2Go agent
>
> rc x2godesktopsharing 3.1.1.4-0~186~ubuntu16.04.1 i386 Share X11 desktops with other users via X2Go
>
> ii x2gomatebindings 0.0.1.5-0~203~ubuntu16.04.1 i386 X2Go MATE bindings and MIME types
>
> ii x2goserver 4.1.0.0-0~1517~ubuntu16.04.1 i386 X2Go server daemon scripts
>
> ii x2goserver-common 4.1.0.0-0~1517~ubuntu16.04.1 i386 X2Go Server (common files)
>
> ii x2goserver-extensions 4.1.0.0-0~1517~ubuntu16.04.1 all X2Go Server (extension support)
>
> ii x2goserver-printing 4.1.0.0-0~1517~ubuntu16.04.1 all X2Go server (printing support)
>
> ii x2goserver-x2goagent 4.1.0.0-0~1517~ubuntu16.04.1 all X2Go Server's X2Go Agent
>
> rc x2goserver-xsession 4.1.0.0-0~1517~ubuntu16.04.1 all X2Go Server (Xsession runner)
>
>
> *Here are the packages on the client:*
>
> ii cups-x2go 3.0.1.3-1 all Virtual X2Go printer for CUPS
>
> rc x2goagent 2:3.5.0.33-0~710~ubuntu16.04.1 all X2Go agent
>
> ii x2goclient 4.1.1.1-0~1719~ubuntu16.04.1 amd64 X2Go Client application (Qt4)
>
> rc x2gomatebindings 0.0.1.5-0~203~ubuntu16.04.1 amd64 X2Go MATE bindings and MIME types
>
> rc x2goserver 4.0.1.22-0~1197~ubuntu16.04.1 amd64 X2Go server daemon scripts
>
> rc x2goserver-printing 4.0.1.22-0~1197~ubuntu16.04.1 all X2Go server daemon scripts (printing)
>
> rc x2goserver-xsession 4.0.1.22-0~1197~ubuntu16.04.1 all X2Go server daemon scripts (Xsession runner)
>
> ii x2gousbmount 1.1.0.2-0~469~ubuntu16.04.1 all clientside usb mass-storage device mounting
>
>
>
--
Utálom a google-t.
I hate google.
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