[X2Go-User] Failed to start X2Go Agent Session

[Daniel Kollmer]

Hello Ulrich

The directories in /tmp get created automatically every thime I attempt
a session (and before you ask, they are owned by my user and group)

The links in my home are also fine:

lrwxrwxrwx.  1 danielk computer   59 Oct 16 17:39 C-danielk-50-1539704304_stRTERMINAL_dp24 -> /tmp/.x2go-danielk/C-danielk-50-1539704304_stRTERMINAL_dp24

ls -al /tmp/.x2go-danielk/C-danielk-50-1539703799_stRTERMINAL_dp24

total 24

drwx------.  2 danielk computer 4096 Oct 16 17:30 .

drwxr-xr-x. 11 danielk computer 4096 Oct 16 17:55 ..

-rw-r--r--.  1 danielk computer  516 Oct 16 17:30 options

-rw-------.  1 danielk computer  825 Oct 16 17:30 session.log

-rw-r--r--.  1 danielk computer   12 Oct 16 17:30 sshd.pid

-rw-r--r--.  1 danielk computer    8 Oct 16 17:30 state

That was my first thought, but alas.


On 10/16/2018 06:24 PM, Ulrich Sibiller wrote:
> 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
>>
>>
>> _______________________________________________
>> x2go-user mailing list
>> x2go-user at lists.x2go.org
>> https://lists.x2go.org/listinfo/x2go-user

-- 
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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