Today I was not able to start my application as I got segmentation
faults constantly.
I've attached gdb and that is the result:
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1212216416 (LWP 29850)]
PyErr_Occurred () at Python/errors.c:80
80 Python/errors.c: No such file or directory.
in Python/errors.c
(gdb) bt
#0 PyErr_Occurred () at Python/errors.c:80
#1 0x002ce167 in _PyObject_GC_Malloc (basicsize=40) at Modules/
gcmodule.c:1326
#2 0x002ce21c in _PyObject_GC_NewVar (tp=0x3083c0, nitems=7) at
Modules/gcmodule.c:1352
#3 0x00267c33 in PyTuple_New (size=7) at Objects/tupleobject.c:68
#4 0x0041cdc0 in ?? ()
#5 0x00000007 in ?? ()
#6 0x0000001c in ?? ()
#7 0xb7beab18 in ?? ()
#8 0x0041cd4e in ?? ()
#9 0xb7be9af8 in ?? ()
#10 0xb758b22c in ?? ()
#11 0xb7be9b80 in ?? ()
#12 0x0042fed4 in ?? ()
#13 0x0042fed4 in ?? ()
#14 0xb7be9acc in ?? ()
#15 0xb7be9a2c in ?? ()
#16 0xfbad8001 in ?? ()
#17 0xb7be9ca0 in ?? ()
#18 0xb7be9ca0 in ?? ()
#19 0xb7be9ca0 in ?? ()
#20 0xb7be9ca0 in ?? ()
#21 0x0042fed4 in ?? ()
#22 0x08098608 in apr_bucket_type_eos ()
#23 0x09ba7920 in ?? ()
#24 0x0000002c in ?? ()
#25 0xffffffff in ?? ()
#26 0x00000413 in ?? ()
#27 0x00000000 in ?? ()
(gdb) thread apply all bt
Thread 4 (Thread -1211159648 (LWP 29848)):
#0 0x00ad57a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x00bb33b1 in ___newselect_nocancel () from /lib/tls/libc.so.6
#2 0x0097826b in apr_sleep (t=299000053) at time/unix/time.c:246
#3 0x00a76110 in wsgi_monitor_thread (thd=0x9a93420, data=0x9a92dd0)
at mod_wsgi.c:8367
#4 0x0097783c in dummy_worker (opaque=0xfffffdfe) at threadproc/unix/
thread.c:142
#5 0x00c723cc in start_thread () from /lib/tls/libpthread.so.0
#6 0x00bba96e in clone () from /lib/tls/libc.so.6
Thread 3 (Thread -1211688032 (LWP 29849)):
#0 0x00ad57a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x00bb33b1 in ___newselect_nocancel () from /lib/tls/libc.so.6
#2 0x0097826b in apr_sleep (t=1000000) at time/unix/time.c:246
#3 0x00a75f6a in wsgi_deadlock_thread (thd=0x9a93440, data=0x9a92dd0)
at mod_wsgi.c:8279
#4 0x0097783c in dummy_worker (opaque=0xfffffdfe) at threadproc/unix/
thread.c:142
#5 0x00c723cc in start_thread () from /lib/tls/libpthread.so.0
#6 0x00bba96e in clone () from /lib/tls/libc.so.6
Thread 2 (Thread -1212216416 (LWP 29850)):
#0 PyErr_Occurred () at Python/errors.c:80
#1 0x002ce167 in _PyObject_GC_Malloc (basicsize=40) at Modules/
gcmodule.c:1326
#2 0x002ce21c in _PyObject_GC_NewVar (tp=0x3083c0, nitems=7) at
Modules/gcmodule.c:1352
#3 0x00267c33 in PyTuple_New (size=7) at Objects/tupleobject.c:68
#4 0x0041cdc0 in ?? ()
#5 0x00000007 in ?? ()
#6 0x0000001c in ?? ()
#7 0xb7beab18 in ?? ()
#8 0x0041cd4e in ?? ()
#9 0xb7be9af8 in ?? ()
#10 0xb758b22c in ?? ()
#11 0xb7be9b80 in ?? ()
#12 0x0042fed4 in ?? ()
#13 0x0042fed4 in ?? ()
#14 0xb7be9acc in ?? ()
#15 0xb7be9a2c in ?? ()
#16 0xfbad8001 in ?? ()
#17 0xb7be9ca0 in ?? ()
#18 0xb7be9ca0 in ?? ()
#19 0xb7be9ca0 in ?? ()
#20 0xb7be9ca0 in ?? ()
#21 0x0042fed4 in ?? ()
#22 0x08098608 in apr_bucket_type_eos ()
#23 0x09ba7920 in ?? ()
#24 0x0000002c in ?? ()
#25 0xffffffff in ?? ()
#26 0x00000413 in ?? ()
#27 0x00000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
Thread 1 (Thread -1208453440 (LWP 29847)):
#0 0x00ad57a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x00c787c7 in do_sigwait () from /lib/tls/libpthread.so.0
#2 0x00c7888f in sigwait () from /lib/tls/libpthread.so.0
#3 0x009775ea in apr_signal_thread (signal_handler=0xa75e30
<wsgi_check_signal>) at threadproc/unix/signals.c:383
#4 0x00a76b61 in wsgi_start_process (p=0x9a0d0a8, daemon=0x9a92dd0)
at mod_wsgi.c:8483
#5 0x00a7707a in wsgi_manage_process (reason=0, data=0x9a92dd0,
status=11) at mod_wsgi.c:7708
#6 0x009703c8 in apr_proc_other_child_alert (proc=0xbfea8f80,
reason=0, status=11) at misc/unix/otherchild.c:115
#7 0x080817ad in ap_mpm_run (_pconf=0x9a0d0a8, plog=0x9a3b160,
s=0x9a0ef48) at worker.c:1611
#8 0x08061d9c in main (argc=3, argv=0xbfea90e4) at main.c:730
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
PyErr_Occurred () at Python/errors.c:80
80 in Python/errors.c
(gdb) cont
Continuing.
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb) quit
After switching to WSGIApplicationGroup %{GLOBAL} my application
started, but I have few more applications on this apache instance so I
can't use this kind of setup.
Is there anything interesting in the above gdb log? Any other commands
that I can use next time?
--
Maciej Wisniowski
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