[X2Go-User] Problem with x2go - the connection with the remote server was shut down

Ulrich Sibiller uli42 at gmx.de
Fri Aug 24 15:26:25 CEST 2018


On Fri, Aug 24, 2018 at 3:00 PM, Brian Lam <blam314159 at gmail.com> wrote:
> Tried abrt-cli list.  Last problem lists was 2 weeks ago.
>
> Here is the re-run of gdb as you specified -
>
> [root at pleth01 cchu]# gdb /usr/bin/nxagent core.15672
> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-92.el6)
> Copyright (C) 2010 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /usr/bin/nxagent...(no debugging symbols found)...done.
>
> warning: core file may not match specified executable file.
> [New Thread 15672]
> Reading symbols from /usr/lib64/nx/X11/libX11.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/nx/X11/libX11.so.6
> Reading symbols from /usr/lib64/libXcomp.so.3...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXcomp.so.3
> Reading symbols from /usr/lib64/libXcompshad.so.3...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXcompshad.so.3
> Reading symbols from /usr/lib64/libXrender.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXrender.so.1
> Reading symbols from /usr/lib64/libXfixes.so.3...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXfixes.so.3
> Reading symbols from /usr/lib64/libXfont.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXfont.so.1
> Reading symbols from /usr/lib64/libXcomposite.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXcomposite.so.1
> Reading symbols from /usr/lib64/libXinerama.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXinerama.so.1
> Reading symbols from /usr/lib64/libXdmcp.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXdmcp.so.6
> Reading symbols from /usr/lib64/libXext.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXext.so.6
> Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done.
> Loaded symbols for /lib64/libz.so.1
> Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
> Loaded symbols for /lib64/libm.so.6
> Reading symbols from /usr/lib64/libXpm.so.4...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXpm.so.4
> Reading symbols from /usr/lib64/libxml2.so.2...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libxml2.so.2
> Reading symbols from /usr/lib64/libpixman-1.so.0...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libpixman-1.so.0
> Reading symbols from /usr/lib64/libpng12.so.0...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libpng12.so.0
> Reading symbols from /usr/lib64/libjpeg.so.62...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libjpeg.so.62
> Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
> Loaded symbols for /lib64/libc.so.6
> Reading symbols from /lib64/libpthread.so.0...(no debugging symbols
> found)...done.
> [Thread debugging using libthread_db enabled]
> Loaded symbols for /lib64/libpthread.so.0
> Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libstdc++.so.6
> Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /lib64/libgcc_s.so.1
> Reading symbols from /usr/lib64/libXdamage.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXdamage.so.1
> Reading symbols from /usr/lib64/libXrandr.so.2...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXrandr.so.2
> Reading symbols from /usr/lib64/libXtst.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXtst.so.6
> Reading symbols from /usr/lib64/libfreetype.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libfreetype.so.6
> Reading symbols from /usr/lib64/libfontenc.so.1...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libfontenc.so.1
> Reading symbols from /lib64/libdl.so.2...(no debugging symbols
> found)...done.
> Loaded symbols for /lib64/libdl.so.2
> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
> found)...done.
> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> Reading symbols from /usr/lib64/libXi.so.6...(no debugging symbols
> found)...done.
> Loaded symbols for /usr/lib64/libXi.so.6
> Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols
> found)...done.
> Loaded symbols for /lib64/libnss_files.so.2
> Core was generated by `x2goagent -nolisten tcp -extension BIG-REQUESTS
> -nolisten tcp -dpi 96 -D -auth'.
> Program terminated with signal 6, Aborted.
> #0  0x00000038cfc32495 in raise () from /lib64/libc.so.6
> Missing separate debuginfos, use: debuginfo-install
> nxagent-3.5.99.16-0.0build1.1.git20180719.2988.main.el6.x86_64

Did you forget the "bt" call?

I don't see a debuginfo rpm for nxagent in
http://packages.x2go.org/epel/6/main/x86_64/rpms/nx-libs/ but can you
try to install http://packages.x2go.org/epel/6/main/x86_64/rpms/nx-libs/nx-libs-debuginfo-3.5.99.16-0.0build1.1.git20180719.2988.main.el6.x86_64.rpm,
restart gdb and issue the bt command, please?

Uli

>
>
> Thanks!
>
> On Fri, Aug 24, 2018 at 5:46 AM Ulrich Sibiller <uli42 at gmx.de> wrote:
>>
>> On Fri, Aug 24, 2018 at 2:24 PM, Brian Lam <blam314159 at gmail.com> wrote:
>> >
>> > With the new errors about failed connection and x2gocheckport (see
>> > screenshot in previous email), I can no longer generate core dump.
>> > However, if I look at one of the older cored dumps, I get this -
>>
>> Did you have  a look at the abrt-cli command? It stroes coredumps in
>> some crash directory. So you might find some more.
>>
>> > [root at pleth01 cchu]# gdb core.15672
>> > GNU gdb (GDB) Red Hat Enterprise Linux (7.2-92.el6)
>> > Copyright (C) 2010 Free Software Foundation, Inc.
>> > License GPLv3+: GNU GPL version 3 or later
>> > <http://gnu.org/licenses/gpl.html>
>> > This is free software: you are free to change and redistribute it.
>> > There is NO WARRANTY, to the extent permitted by law.  Type "show
>> > copying"
>> > and "show warranty" for details.
>> > This GDB was configured as "x86_64-redhat-linux-gnu".
>> > For bug reporting instructions, please see:
>> > <http://www.gnu.org/software/gdb/bugs/>...
>> > Missing separate debuginfo for the main executable file
>> > Try: yum --enablerepo='*-debug*' install
>> > /usr/lib/debug/.build-id/6e/4396cb4f9e63dd00414f4fc7d932db3dc5099d
>> > [New Thread 15672]
>> > Core was generated by `x2goagent -nolisten tcp -extension BIG-REQUESTS
>> > -nolisten tcp -dpi 96 -D -auth'.
>> > Program terminated with signal 6, Aborted.
>> > #0  0x00000038cfc32495 in ?? ()
>> > "/home/cchu/core.15672" is a core file.
>> > Please specify an executable to debug.
>>
>>
>> Can you please retry and call "gdb /usr/bin/nxagent core.15672"?
>>
>> Uli


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