[X2Go-User] Failed to start X2Go Agent Session

[Ulrich Sibiller]

Have you tried creating /tmp/.x2go-danielk? Is there a dangling link
in ~danielk/.x2go/?
On Tue, Oct 16, 2018 at 6:11 PM Daniel Kollmer <danielk at nikhef.nl> wrote:
>
> Hello
>
> After some user's session got broken due to a client/server
> incompatibility, the user deleted all their session data and then told
> me they can not log in at all anymore. At first I could not see any
> problem (everything worked as expected for me), but when I deleted my
> own /tmp/.x2go-danielk directory, I started having the exact same problem.
>
> The error I get is:
>
> Agent output: "Failed to start X2Go Agent session with ID
> danielk-50-1539704304_stRTERMINAL_dp24. X2Go Agent terminated
> unexpectedly. Aborting session startup. The complete relevant last part
> of the debug log is pasted below.
>
> The session.log for this session contains the error
>
> Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-danielk/C-danielk-50-1539704304_stRTERMINAL_dp24/options:50''.
>
> Do you have any idea how I can get this working again. It appears to me
> that something is not functioning accordingly with the session
> management, because the session state file remains in state STARTING and
> if I try logging in again then I get asked whether I want to terminate
> or suspend the running session (can't resume)
>
> Thanks for any help.
>
> Additional information about the system:
>
> X2Go Client 4.1.1.1
>
> x2goserver: 4.1.0.0
> x2goserver-common: 4.1.0.0
> x2goserver-extensions: 4.1.0.0
> x2goserver-x2goagent: 3.5.99.16
> x2goserver-xsession: 4.1.0.0
>
> CentOS Linux release 7.5.1804
>
> Home directories are mounted on NFS
>
> The problem exists for different Windows and Linux clients tested
> (Windows 7, Windows 10, CentOS, Ubuntu)
>
> The complete relevant last part of the debug log is:
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:1884> Unlocking SSH channel connection MUTEX.
> x2go-DEBUG-../src/sshmasterconnection.cpp:2072> Creating new channel.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2089> New channel:0x7fee0c00c780
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2174> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:d9eae36c-6aa2-4fd4-9dfc-e700aaaea1d0"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2golistsessions; echo "X2GODATAEND:d9eae36c-6aa2-4fd4-9dfc-e700aaaea1d0";'"
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2197> New exec channel created.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2301> EOF on channel 0x7fee0c00c780; SshProcess object: 0
> x2go-DEBUG-../src/sshmasterconnection.cpp:2369> EOF sent.
> x2go-DEBUG-../src/sshmasterconnection.cpp:2373> Channel closed.
> x2go-DEBUG-../src/sshprocess.cpp:526> SSH finished: raw output (stdout): "X2GODATABEGIN:d9eae36c-6aa2-4fd4-9dfc-e700aaaea1d0
> X2GODATAEND:d9eae36c-6aa2-4fd4-9dfc-e700aaaea1d0
> "
> x2go-DEBUG-../src/sshprocess.cpp:537> SSH finished: true - "" (0).
> x2go-DEBUG-../src/onmainwindow.cpp:3982> ""
> x2go-DEBUG-../src/onmainwindow.cpp:4556> Executing remote command: "X2GODPI=96 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_24 us auto 1 R TERMINAL both"
> x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 1: "X2GODPI=96 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_24 us auto 1 R TERMINAL both"
> x2go-DEBUG-../src/sshprocess.cpp:213> this=SshProcess(0x285a6d0)  Running masterCon->addChannelConnection(this, ' "57b6188d-1487-4c88-9c6b-53043bddee5e" ', ' "bash -l -c 'echo "X2GODATABEGIN:57b6188d-1487-4c88-9c6b-53043bddee5e"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=96 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9" ');
> x2go-DEBUG-../src/sshmasterconnection.cpp:1880> Locking SSH channel connection MUTEX.
> x2go-DEBUG-../src/sshmasterconnection.cpp:1882> Passing new channel connection object to channelConnections.
> x2go-DEBUG-../src/sshmasterconnection.cpp:1884> Unlocking SSH channel connection MUTEX.
> x2go-DEBUG-../src/sshmasterconnection.cpp:2072> Creating new channel.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2089> New channel:0x7fee0c00c780
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2174> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:57b6188d-1487-4c88-9c6b-53043bddee5e"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=96 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_24 us auto 1 R TERMINAL both; echo "X2GODATAEND:57b6188d-1487-4c88-9c6b-53043bddee5e";'"
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2197> New exec channel created.
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:2301> EOF on channel 0x7fee0c00c780; SshProcess object: 1
> x2go-DEBUG-../src/sshmasterconnection.cpp:2369> EOF sent.
> x2go-DEBUG-../src/sshmasterconnection.cpp:2373> Channel closed.
> x2go-DEBUG-../src/sshprocess.cpp:526> SSH finished: raw output (stdout): "X2GODATABEGIN:57b6188d-1487-4c88-9c6b-53043bddee5e
> X2GODATAEND:57b6188d-1487-4c88-9c6b-53043bddee5e
> "
> x2go-DEBUG-../src/sshprocess.cpp:532> Have stderr only, something must be wrong.
> x2go-DEBUG-../src/sshprocess.cpp:537> SSH finished: false - "Failed to start X2Go Agent session with ID danielk-50-1539704304_stRTERMINAL_dp24. X2Go Agent terminated unexpectedly. Aborting session startup.
> " (1).
> x2go-DEBUG-../src/onmainwindow.cpp:5390> Agent output: "Failed to start X2Go Agent session with ID danielk-50-1539704304_stRTERMINAL_dp24. X2Go Agent terminated unexpectedly. Aborting session startup.
>
> --
> Daniel Kollmer
> Computer Technology Group
> NIKHEF - Dutch National Institute for Sub-atomic Physics
> Science Park 105 1098 XG Amsterdam
> Phone: +31205922164
>
>
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