We also encountered this issue with 2.4.7-1ubuntu4.17
I can reproduce it from times to times with a light parralel load (50-200
requests in //)
Here is some details:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f811d7fa700 (LWP 26536)]
process_socket (my_thread_num=8, my_child_num=<optimized out>,
cs=0x7f81241962b8, sock=<optimized out>, p=<optimized out>, thd=<optimized
out>) at event.c:1064
1064 event.c: No such file or directory.
(gdb) bt
#0 process_socket (my_thread_num=8, my_child_num=<optimized out>,
cs=0x7f81241962b8, sock=<optimized out>, p=<optimized out>, thd=<optimized
out>) at event.c:1064
#1 worker_thread (thd=<optimized out>, dummy=<optimized out>) at event.c:1815
#2 0x00007f8129ec6184 in start_thread (arg=0x7f811d7fa700) at
pthread_create.c:312
#3 0x00007f8129bf2ffd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
(gdb) bt full
#0 process_socket (my_thread_num=8, my_child_num=<optimized out>,
cs=0x7f81241962b8, sock=<optimized out>, p=<optimized out>, thd=<optimized
out>) at event.c:1064
c = 0x7f8124196330
sbh = 0x7f8124196908
conn_id = <optimized out>
rc = <optimized out>
#1 worker_thread (thd=<optimized out>, dummy=<optimized out>) at event.c:1815
ti = <optimized out>
process_slot = <optimized out>
thread_slot = 8
csd = 0x7f81241960b0
cs = 0x7f81241962b8
ptrans = 0x7f8124196028
rv = <optimized out>
is_idle = 0
te = 0x0
#2 0x00007f8129ec6184 in start_thread (arg=0x7f811d7fa700) at
pthread_create.c:312
__res = <optimized out>
pd = 0x7f811d7fa700
now = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140192522413824,
-4554003917395454359, 0, 0, 140192522414528, 140192522413824,
4597849143617525353, 4597821488042743401}, mask_was_saved = 0}}, priv = {pad =
{0x0, 0x0, 0x0, 0x0},
data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
not_first_call = <optimized out>
pagesize_m1 = <optimized out>
sp = <optimized out>
freesize = <optimized out>
__PRETTY_FUNCTION__ = "start_thread"
#3 0x00007f8129bf2ffd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
(gdb) p c
$1 = (conn_rec *) 0x7f8124196330
(gdb) p *c
Cannot access memory at address 0x7f8124196330
(gdb) p cs
$2 = (event_conn_state_t *) 0x7f81241962b8
(gdb) p *cs
Cannot access memory at address 0x7f81241962b8
And the corresponding core. If you need more information, please ask
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https://bugs.launchpad.net/bugs/1630413
Title:
segfault in server/mpm/event/event.c:process_socket
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