[dancer-users] advent.perldancer.org seems to be down

[David Precious]

Yeah, something weird is going on - I upgraded the box it's on to the
latest Debian, and now that particular site seems to keep freezing
periodically.

When it does, an strace on the starman worker processes shows no
syscalls being made at all - no selects etc, even if I connect to the
port (and I can get a TCP connection and send to it, but get no
response)

a backtrace on the master process via gdb looked like:
#0  0x004dea79 in Perl_sv_free2 ()
#1  0x00507383 in Perl_free_tmps ()
#2  0x004d0995 in Perl_pp_nextstate ()
#3  0x004d0683 in Perl_runops_standard ()
#4  0x0045bf04 in perl_run ()
#5  0x00434bc6 in main ()


The worker processes are all in "running" state, using signiciant
amounts of CPU, and stracing then shows no syscalls.  I whipped up a
shell script to gdb backtrace each running worker process to see what
it's doing, and saw no consistent "sticking point", e.g.:


[davidp at shakermaker:~]$ ./starman-backtraces 
grep: grep: warning: GREP_OPTIONS is deprecated; please use an alias or
script
warning: GREP_OPTIONS is deprecated; please use an alias or script
PID: 3862
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0x00507e1d in Perl_save_clearsv ()
#0  0x00507e1d in Perl_save_clearsv ()
#1  0x004d9d0d in Perl_pp_padsv ()
#2  0x004d0683 in Perl_runops_standard ()
#3  0x0045bf04 in perl_run ()
#4  0x00434bc6 in main ()
***********************************************************
PID: 4870
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0x004d0d10 in Perl_pp_sassign ()
#0  0x004d0d10 in Perl_pp_sassign ()
#1  0x004d0683 in Perl_runops_standard ()
#2  0x0045bf04 in perl_run ()
#3  0x00434bc6 in main ()
***********************************************************
PID: 5663
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0x004b3a10 in Perl_safesysmalloc ()
#0  0x004b3a10 in Perl_safesysmalloc ()
#1  0x004e5ed6 in Perl_sv_grow ()
#2  0x004e4e0b in Perl_sv_setsv_flags ()
#3  0x004d882a in Perl_leave_adjust_stacks ()
#4  0x005184bc in Perl_pp_return ()
#5  0x004d0683 in Perl_runops_standard ()
#6  0x0045bf04 in perl_run ()
#7  0x00434bc6 in main ()
***********************************************************
PID: 5977
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0x00552307 in PerlIOBase_error ()
#0  0x00552307 in PerlIOBase_error ()
#1  0x0051df2a in Perl_pp_sysread ()
#2  0x004d0683 in Perl_runops_standard ()
#3  0x0045bf04 in perl_run ()
#4  0x00434bc6 in main ()
***********************************************************
PID: 13541
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0x004d3a6e in Perl_pp_aassign ()
#0  0x004d3a6e in Perl_pp_aassign ()
#1  0x004d0683 in Perl_runops_standard ()
#2  0x0045bf04 in perl_run ()
#3  0x00434bc6 in main ()
***********************************************************


At the moment I'm somewhat at a loss as to what's going on, but haven't
had much time to investigate properly :|






On Sun, 8 Oct 2017 09:22:42 -0600 Scott H <scott.harpster at gmail.com>
wrote:

> its down for me as well.
> 
> On Oct 8, 2017 12:40 AM, "Gabor Szabo" <szabgab at gmail.com> wrote:
> 
> > Hi,
> >
> > http://advent.perldancer.org/ seems it is down both for me and for
> > another one:
> > http://downforeveryoneorjustme.com/advent.perldancer.org
> >
> > Gabor
> > _______________________________________________
> > dancer-users mailing list
> > dancer-users at dancer.pm
> > http://lists.preshweb.co.uk/mailman/listinfo/dancer-users
> >