Well it's not firewalld.
lsof -i :6050 returns nothing.
from bash x:
bash -x /usr/lib64/x2go/x2gogetfreeport $(hostname) "$(which ss)" display 50
typeset current_host_name=ourdomain.edu
typeset ss=/usr/sbin/ss
typeset type=display
typeset start=50
typeset end=65535
typeset 'empty_regex=^[[:space:]]*$'
[[ -z ourdomain.edu ]]
[[ ourdomain.edu =~ ^[[:space:]]*$ ]]
[[ ourdomain.edu = \(\n\o\n\e\) ]]
[[ ourdomain.edu = \l\o\c\a\l\h\o\s\t ]]
[[ -z /usr/sbin/ss ]]
[[ /usr/sbin/ss =~ ^[[:space:]]*$ ]]
typeset -i start_i=50
typeset -i end_i=65535
[[ -z 50 ]]
[[ 50 != \5\0 ]]
[[ 50 -ne 50 ]]
[[ 50 -lt 0 ]]
[[ 50 -gt 65535 ]]
[[ -z 65535 ]]
[[ 65535 != \6\5\5\3\5 ]]
[[ 65535 -ne 65535 ]]
[[ 65535 -lt 50 ]]
[[ 65535 -gt 65535 ]]
[[ display != \l\o\w\l\e\v\e\l ]]
[[ display != \d\i\s\p\l\a\y ]]
++ x2gopath libexec
typeset x2go_lib_path=/usr/lib64/x2go
typeset X2GO_INTERNAL_SOURCE=1
: 1
. /usr/lib64/x2go/x2gocheckport
++ [[ -z 1 ]]
++ typeset -a used_x2go_ports
++ typeset -a used_system_ports
++ typeset -a used_display_ports
++ used_x2go_ports=()
++ used_system_ports=()
++ used_display_ports=()
unset X2GO_INTERNAL_SOURCE
typeset -i ret_port=50
typeset -i ret=1
typeset -i work_port=0
typeset -i stop_port=65535
[[ display = \d\i\s\p\l\a\y ]]
stop_port=59535
(( work_port = start ))
(( i <= stop_port ))
typeset -i i=0
typeset -i value_found=0
[[ display = \d\i\s\p\l\a\y ]]
check_display_port ourdomain.edu /usr/sbin/ss 50
typeset current_host_name=ourdomain.edu
typeset ss=/usr/sbin/ss
typeset port=50
typeset 'empty_regex=^[[:space:]]*$'
[[ -z ourdomain.edu ]]
[[ ourdomain.edu =~ ^[[:space:]]*$ ]]
[[ ourdomain.edu = \(\n\o\n\e\) ]]
[[ ourdomain.edu = \l\o\c\a\l\h\o\s\t ]]
[[ -z /usr/sbin/ss ]]
[[ /usr/sbin/ss =~ ^[[:space:]]*$ ]]
typeset -i port_i=50
[[ -z 50 ]]
[[ 50 != \5\0 ]]
[[ 50 -ne 50 ]]
[[ 50 -lt 0 ]]
[[ 50 -gt 59535 ]]
typeset -i ret=0
[[ 0 -eq 0 ]]
initialize_display_ports ourdomain.edu
typeset current_host_name=ourdomain.edu
typeset 'empty_regex=^[[:space:]]*$'
[[ -z ourdomain.edu ]]
[[ ourdomain.edu =~ ^[[:space:]]*$ ]]
[[ ourdomain.edu = \(\n\o\n\e\) ]]
[[ ourdomain.edu = \l\o\c\a\l\h\o\s\t ]]
typeset -a used_display_ports_work
used_display_ports_work=()
IFS='
|'
- read -r -d '' -a used_display_ports_work
++ /usr/lib64/x2go/x2gogetdisplays ourdomain.edu
typeset -i item_i=0
typeset item=
for item in "${used_display_ports_work[@]}"
item_i=DBI
[[ -n DBI ]]
[[ DBI -eq 0 ]]
[[ DBI = \0 ]]
for item in "${used_display_ports_work[@]}"
item_i='connect('\''dbname=/var/lib/x2go/x2go_sessions'\'','\'''\'',...)'
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
- printf '%d\n' 50
50
- exit 1
Here's some debug from X2Go Mac Client:
x2go-INFO-1> "Starting X2Go Client 4.1.2.2..."
x2go-WARNING-1> English language requested, not loading translator.
x2go-WARNING-1> English language requested, not loading translator.
x2go-INFO-3> "Started X2Go Client."
x2go-DEBUG-../src/onmainwindow.cpp:575> "$HOME=/Users/rkudyba"
x2go-DEBUG-../src/onmainwindow.cpp:2266> Reading 2 sessions from config file.
x2go-DEBUG-../src/sessionbutton.cpp:361> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png".
x2go-DEBUG-../src/sessionbutton.cpp:361> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png".
x2go-DEBUG-../src/onmainwindow.cpp:13290> libssh not initialized yet. Initializing.
x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/opt/X11/bin"
x2go-DEBUG-../src/x2goutils.cpp:242> tmp_clean_add: ("/usr/local/bin")
x2go-DEBUG-../src/x2goutils.cpp:270> clean_add: ("/usr/local/bin")
x2go-DEBUG-../src/x2goutils.cpp:291> found entry i (0) in orig_path_list ("/usr/local/bin"): true
x2go-DEBUG-../src/x2goutils.cpp:309> return value at end: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/opt/X11/bin"
x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/opt/X11/bin"
x2go-DEBUG-../src/x2goutils.cpp:242> tmp_clean_add: ("/opt/local//bin")
x2go-DEBUG-../src/x2goutils.cpp:270> clean_add: ("/opt/local//bin")
x2go-DEBUG-../src/x2goutils.cpp:291> found entry i (0) in orig_path_list ("/opt/local//bin"): false
x2go-DEBUG-../src/x2goutils.cpp:309> return value at end: "/opt/local//bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/opt/X11/bin"
x2go-DEBUG-../src/pulsemanager.cpp:131> Found PA binary as "/Applications/x2goclient.app/Contents/exe/pulseaudio"
x2go-DEBUG-../src/pulsemanager.cpp:132> Corresponding working dir: "/Applications/x2goclient.app/Contents/exe"
x2go-DEBUG-../src/pulsemanager.cpp:369> pulseaudio --version returned:"pulseaudio 13.0-rebootstrapped
"
x2go-DEBUG-../src/pulsemanager.cpp:227> pulse started with arguments ("--exit-idle-time=-1", "-n", "-F", "/Users/rkudyba/.x2go/pulse/config.pa", "-p", "/Applications/x2goclient.app/Contents/Frameworks/pulse-13.0/modules", "--high-priority", "--log-level=debug", "--verbose", "--log-target=file:/Users/rkudyba/.x2go/pulse/pulse.log") - waiting for it to finish...
x2go-DEBUG-../src/onmainwindow.cpp:2752> Creating QPixmap with session icon: '":/img/icons/128x128/x2gosession.png"'.
x2go-DEBUG-../src/onmainwindow.cpp:6771> Setting focus.
x2go-INFO-8> "Starting connection to server: ourdomain.edu:22"
x2go-DEBUG-../src/onmainwindow.cpp:2853> Starting new ssh connection to server:"ourdomain.edu":"22" krbLogin: false
x2go-DEBUG-../src/sshmasterconnection.cpp:168> SshMasterConnection, host " ourdomain.edu"; port 22; user "localguy"; useproxy false; proxyserver ""; proxyport 22
x2go-DEBUG-../src/sshmasterconnection.cpp:248> Starting SSH connection without Kerberos authentication.
x2go-DEBUG-../src/sshmasterconnection.cpp:250> SshMasterConnection, instance SshMasterConnection(0x7fe92e5bcd00) created.
x2go-DEBUG-../src/sshmasterconnection.cpp:495> SshMasterConnection, instance SshMasterConnection(0x7fe92e5bcd00) entering thread.
x2go-DEBUG-../src/sshmasterconnection.cpp:797> Session port before config file parse: 22
x2go-DEBUG-../src/sshmasterconnection.cpp:807> Session port after config file parse: 22
x2go-DEBUG-../src/sshmasterconnection.cpp:870> Session port before config file parse (part 2): 22
x2go-DEBUG-../src/sshmasterconnection.cpp:880> Session port after config file parse (part 2): 22
x2go-DEBUG-../src/sshmasterconnection.cpp:904> cserverAuth
x2go-DEBUG-../src/sshmasterconnection.cpp:943> state: 1
x2go-DEBUG-../src/sshmasterconnection.cpp:1218> Trying password mechanism if available.
x2go-DEBUG-../src/sshmasterconnection.cpp:1222> Password mechanism available. Continuing.
x2go-DEBUG-../src/sshmasterconnection.cpp:687> User authentication OK.
x2go-DEBUG-../src/sshmasterconnection.cpp:1708> LOGIN CHECK:"LOGIN OK
"
x2go-DEBUG-../src/sshmasterconnection.cpp:1711> don't have interaction
x2go-DEBUG-../src/sshmasterconnection.cpp:1744> LOOP FINISHED
x2go-DEBUG-../src/sshmasterconnection.cpp:1748> No interaction needed, continue session
x2go-DEBUG-../src/sshmasterconnection.cpp:702> Login Check - OK
x2go-DEBUG-../src/onmainwindow.cpp:2947> SSH connection established.
x2go-DEBUG-../src/onmainwindow.cpp:3374> Continue normal X2Go session
x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 0: "x2golistsessions"
x2go-DEBUG-../src/sshprocess.cpp:213> this=SshProcess(0x7fe92e6c1450) Running masterCon->addChannelConnection(this, ' "8c7a9bb9-2997-40cc-95d8-fd196ab46804" ', ' "bash -l -c 'echo "X2GODATABEGIN:8c7a9bb9-2997-40cc-95d8-fd196ab46804"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2golistsessions; echo "X2GODATAEND:8c7a9bb9-2997-40cc-95d8-fd196a" ');
x2go-DEBUG-../src/sshmasterconnection.cpp:1810> Locking SSH channel connection MUTEX.
x2go-DEBUG-../src/sshmasterconnection.cpp:1812> Passing new channel connection object to channelConnections.
x2go-DEBUG-../src/sshmasterconnection.cpp:1814> Unlocking SSH channel connection MUTEX.
x2go-DEBUG-../src/sshmasterconnection.cpp:1977> Creating new channel.
x2go-DEBUG-../src/sshmasterconnection.cpp:1990> New channel:0x7fe92e5da590
x2go-DEBUG-../src/sshmasterconnection.cpp:2065> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:8c7a9bb9-2997-40cc-95d8-fd196ab46804"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2golistsessions; echo "X2GODATAEND:8c7a9bb9-2997-40cc-95d8-fd196ab46804";'"
x2go-DEBUG-../src/sshmasterconnection.cpp:2082> New exec channel created.
x2go-DEBUG-../src/sshmasterconnection.cpp:2165> EOF on channel 0x7fe92e5da590; SshProcess object: 0
x2go-DEBUG-../src/sshmasterconnection.cpp:2222> EOF sent.
x2go-DEBUG-../src/sshmasterconnection.cpp:2224> Channel closed.
x2go-DEBUG-../src/sshprocess.cpp:532> SSH finished: raw output (stdout): "X2GODATABEGIN:8c7a9bb9-2997-40cc-95d8-fd196ab46804
DBIconnect('dbname=/var/lib/x2go/x2go_sessions','',...)failed:unabletoopendatabasefileat/usr/share/perl5/vendor_perl/X2Go/Server/DB/SQLite3.pmline66.
X2GODATAEND:8c7a9bb9-2997-40cc-95d8-fd196ab46804
"
x2go-DEBUG-../src/sshprocess.cpp:543> SSH finished: true - "DBIconnect('dbname=/var/lib/x2go/x2go_sessions','',...)failed:unabletoopendatabasefileat/usr/share/perl5/vendor_perl/X2Go/Server/DB/SQLite3.pmline66.
" (0).
x2go-DEBUG-../src/onmainwindow.cpp:3861> "DBIconnect('dbname=/var/lib/x2go/x2go_sessions','',...)failed:unabletoopendatabasefileat/usr/share/perl5/vendor_perl/X2Go/Server/DB/SQLite3.pmline66.
"
x2go-DEBUG-../src/onmainwindow.cpp:4521> Executing remote command: "X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both"
x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 1: "X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both"
x2go-DEBUG-../src/sshprocess.cpp:213> this=SshProcess(0x7fe92e5f7ef0) Running masterCon->addChannelConnection(this, ' "563c9735-72a3-44ce-a284-7519be6288bc" ', ' "bash -l -c 'echo "X2GODATABEGIN:563c9735-72a3-44ce-a284-7519be6288bc"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9" ');
x2go-DEBUG-../src/sshmasterconnection.cpp:1810> Locking SSH channel connection MUTEX.
x2go-DEBUG-../src/sshmasterconnection.cpp:1812> Passing new channel connection object to channelConnections.
x2go-DEBUG-../src/sshmasterconnection.cpp:1814> Unlocking SSH channel connection MUTEX.
x2go-DEBUG-../src/sshmasterconnection.cpp:1977> Creating new channel.
x2go-DEBUG-../src/sshmasterconnection.cpp:1990> New channel:0x7fe92e66ac60
x2go-DEBUG-../src/sshmasterconnection.cpp:2065> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:563c9735-72a3-44ce-a284-7519be6288bc"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both; echo "X2GODATAEND:563c9735-72a3-44ce-a284-7519be6288bc";'"
x2go-DEBUG-../src/sshmasterconnection.cpp:2082> New exec channel created.
x2go-DEBUG-../src/sshmasterconnection.cpp:2165> EOF on channel 0x7fe92e66ac60; SshProcess object: 1
x2go-DEBUG-../src/sshmasterconnection.cpp:2222> EOF sent.
x2go-DEBUG-../src/sshmasterconnection.cpp:2224> Channel closed.
x2go-DEBUG-../src/sshprocess.cpp:532> SSH finished: raw output (stdout): "X2GODATABEGIN:563c9735-72a3-44ce-a284-7519be6288bc
X2GODATAEND:563c9735-72a3-44ce-a284-7519be6288bc
"
x2go-DEBUG-../src/sshprocess.cpp:538> Have stderr only, something must be wrong.
x2go-DEBUG-../src/sshprocess.cpp:543> SSH finished: false - "/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
Unable to find free display port or insert new session into database; parameters: port (50), hostname (ourdomain.edu) and session name ().
" (1).
x2go-DEBUG-../src/onmainwindow.cpp:5425> Agent output: "/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
/usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)")
Unable to find free display port or insert new session into database; parameters: port (50), hostname (ourserver.edu) and session name ().
"
2021-01-25 20:31:36.264 x2goclient[4934:264698] modalSession has been exited prematurely - check for a reentrant call to endModalSession:
x2go-DEBUG-../src/onmainwindow.cpp:6771> Setting focus.
On Mon, Jan 25, 2021 at 5:49 PM Ulrich Sibiller <ulrich.sibiller@gmail.com> wrote:
Well, here's the code producing that output:
typeset -i retry='0' typeset -i max_retry='10' typeset output='' for ((retry = 0; retry < max_retry; ++retry)); do typeset -i free_port="${X2GO_PORT}" if free_port="$("${X2GO_LIB_PATH}/x2gogetfreeport" "${current_host_name}" "${ss}" 'display' "${X2GO_PORT}")"; then X2GO_PORT="${free_port}"
if [[ -n "${SHADREQ_USER}" ]]; thenSESSION_NAME="${SHADREQ_USER}-${X2GO_PORT}-$(date '+%s')" else SESSION_NAME="${USER}-${X2GO_PORT}-$(date '+%s')" fi if [[ -n "${COLORDEPTH}" ]]; then
SESSION_NAME="${SESSION_NAME}_st${SESSION_TYPE}${X2GO_CMD}_dp${COLORDEPTH}" SESSION_NAME="${SESSION_NAME//:/PP}" fi
# sanitize session name SESSION_NAME="$(perl -pe 's/[^a-zA-Z0-9\.\_\-\@]//g'<<< "${SESSION_NAME}")"
if [[ -n "${SHADREQ_USER}" ]]; then "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'debug'"initializing new shadow session with ID ${SESSION_NAME}"
output="$("${X2GO_LIB_PATH}/x2goinsertshadowsession" "${X2GO_PORT}" "${current_host_name}" "${SESSION_NAME}" "${SHADREQ_USER}")" else "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'debug' "initializing new session with ID ${SESSION_NAME}" output="$("${X2GO_LIB_PATH}/x2goinsertsession" "${X2GO_PORT}" "${current_host_name}" "${SESSION_NAME}")" fi
if [[ "${output}" = 'inserted' ]]; then break else "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'warning'"unable to insert display port into database. Retrying (run $((retry + 1)))." fi else "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'warning' "no free display number available, cannot start new session. Retrying (run $((retry + 1)))." fi done
if [[ "${output}" != 'inserted' ]]; then typeset msg="Unable to find free display port or insert new session into database; parameters: port (${X2GO_PORT}), hostname (${current_host_name}) and session name (${SESSION_NAME})." "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'err' "${msg}"
# Make x2goclient fail. echo "${msg}" >&2 exit '10'fi
This boils down to
for ((retry = 0; retry < max_retry; ++retry)); do typeset -i free_port="${X2GO_PORT}" if free_port="$("${X2GO_LIB_PATH}/x2gogetfreeport" "${current_host_name}" "${ss}" 'display' "${X2GO_PORT}")"; then ... else "${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'warning' "no free display number available, cannot start new session. Retrying (run $((retry + 1)))." fi done
-> as you can see x2gofreeport does not seem to report the port as free. You can try this manually:
/usr/lib/x2go/x2gogetfreeport $(hostname) "$(which ss)" display 50
If that will output a free port x2go should generally work. If not, you still have something running and blocking these ports. You can check with lsof -i :6050 and you will see who is blocking the first checked port.
You can also run the x2gogefreeport with bash -x: bash -x /usr/lib/x2go/x2gogetfreeport $(hostname) "$(which ss)" display 50
and see what going on.
Hope that helps,
Uli
On Mon, Jan 25, 2021 at 8:50 PM Robert Kudyba <rkudyba@fordham.edu> wrote:
I posted a similar issue back in Nov, 2020 at
https://www.mail-archive.com/x2go-dev@lists.x2go.org/msg06284.html
rpm -qa|grep -i x2go x2goclient-4.1.2.2-3.fc33.x86_64 x2goserver-common-4.1.0.3-9.fc33.noarch perl-X2Go-Server-4.1.0.3-9.fc33.noarch perl-X2Go-Log-4.1.0.3-9.fc33.noarch perl-X2Go-Server-DB-4.1.0.3-9.fc33.x86_64 x2goagent-4.1.0.3-9.fc33.x86_64 x2goserver-xsession-4.1.0.3-9.fc33.noarch x2goserver-4.1.0.3-9.fc33.x86_64
nxagent -display :55 NXAGENT - Version 3.5.99.25
Jan 25 14:14:29 pascal /usr/bin/x2gostartagent[39654]: no free display
Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39663]: no free display number available, cannot start new session. Retrying (run 2). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39672]: no free display number available, cannot start new session. Retrying (run 3). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39681]: no free display number available, cannot start new session. Retrying (run 4). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39690]: no free display number available, cannot start new session. Retrying (run 5). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39699]: no free display number available, cannot start new session. Retrying (run 6). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39708]: no free display number available, cannot start new session. Retrying (run 7). Jan 25 14:14:30 pascal /usr/bin/x2gostartagent[39717]: no free display number available, cannot start new session. Retrying (run 8). Jan 25 14:14:31 pascal /usr/bin/x2gostartagent[39726]: no free display number available, cannot start new session. Retrying (run 9). Jan 25 14:14:31 pascal /usr/bin/x2gostartagent[39736]: no free display number available, cannot start new session. Retrying (run 10). Jan 25 14:14:31 pascal /usr/bin/x2gostartagent[39737]: Unable to find free display port or insert new session into database; parameters: port (50), hostname (pascal.dsm.fordham.edu) and session name (). Jan 25 14:14:31 pascal kernel: kauditd_printk_skb: 21 callbacks suppressed
Let me to https://unix.stackexchange.com/questions/467507/x2go-unable-to-find-free-dis... so I ran x2godbadmin --createdb
Then I tried with another use and got: Connection failed. /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") /usr/lib64/x2go/x2gocheckport: line 131: connect('dbname=/var/lib/x2go/x2go_sessions','',...): syntax error in expression (error token is "('dbname=/var/lib/x2go/x2go_sessions','',...)") Unable to find free display port or insert new session into database;
number available, cannot start new session. Retrying (run 1). parameters: port (50), hostname (oudomain.edu) and session name ().
How does one start X2Go Windows with debug enabled? I only found for Mac
you can add the --debug flag.
My colleague also had this error:
XSession-x2go: X session started for moniot at Mon Jan 25 09:01:13 EST
2021
** Message: 09:01:15.605: couldn't access control socket: /run/user/1200/keyring/control: No such file or directory SSH_AUTH_SOCK=/run/user/1200/keyring/ssh
** (mate-settings-daemon:1436112): WARNING **: 09:01:16.172: Could not open RFKILL control device, please verify your installation SSH_AUTH_SOCK=/run/user/1200/keyring/ssh SSH_AUTH_SOCK=/run/user/1200/keyring/ssh vmware-user: could not open /proc/fs/vmblock/dev Error: /usr/bin/vmtoolsd must be run inside a virtual machine on a VMware hypervisor product. SSH_AUTH_SOCK=/run/user/1200/keyring/ssh
(caja:1436133): Gtk-WARNING **: 09:01:17.552: Failed to register client: GDBus.Error:org.gnome.SessionManager.AlreadyRegistered: Unable to register client *** ERROR *** TI:09:01:17 TH:0x56299587f960 FI:gpm-manager.c FN:gpm_manager_systemd_inhibit,1786
- Error in dbus - GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Permission denied Traceback: mate-power-manager(+0x1d474) [0x562995487474] mate-power-manager(+0x136ab) [0x56299547d6ab] /lib64/libgobject-2.0.so.0(g_type_create_instance+0x248) [0x7f04c0b72498] /lib64/libgobject-2.0.so.0(+0x19205) [0x7f04c0b58205] /lib64/libgobject-2.0.so.0(g_object_new_with_properties+0x1dd) [0x7f04c0b596ad] /lib64/libgobject-2.0.so.0(g_object_new+0xc1) [0x7f04c0b5a331] mate-power-manager(+0x15f16) [0x56299547ff16] mate-power-manager(+0xb20a) [0x56299547520a] /lib64/libc.so.6(__libc_start_main+0xf2) [0x7f04c0708082] mate-power-manager(+0xb58e) [0x56299547558e] Failure: Module initialization failed SELinux Troubleshooter: Applet requires SELinux be enabled to run Initializing caja-open-terminal extension Initializing caja-xattr-tags extension Initializing caja-image-converter extension ICE default IO error handler doing an exit(), pid = 1436318, errno = 32
(mate-settings-daemon:1436112): GLib-GIO-WARNING **: 09:02:44.229: Error releasing name org.mate.SettingsDaemon.Rfkill: The connection is closed [1611583276,000,xklavier.c:xkl_engine_start_listen/] The backend does not require manual layout management - but it is provided by the application