We use NGINX as forward proxy and I am working on upgrading nginx from 1.11.2.2 to nginx-1.13.6.
Post upgrade, started noticing a core dump. Below is the stack trace.
Any help to root cause this is appreciated.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `nginx: worker process'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 __memcmp_sse4_1 () at ../sysdeps/x86_64/multiarch/memcmp-sse4.S:794
794 ../sysdeps/x86_64/multiarch/memcmp-sse4.S: No such file or directory.
(gdb) bt
#0 __memcmp_sse4_1 () at ../sysdeps/x86_64/multiarch/memcmp-sse4.S:794
#1 0x000000000043b009 in ngx_memn2cmp (s1=s1@entry=0x73ae4ec "\002", s2=<optimized out>, n1=16, n2=114016248) at src/core/ngx_string.c:836
#2 0x00000000004823c0 in ngx_http_upstream_keepalive_check (r=r@entry=0x737bab8, u=u@entry=0x737c790, peers=0x737c790, rrp=0x737d020) at src/http/ngx_http_upstream.c:1603
#3 0x00000000004825a7 in ngx_http_upstream_connect (r=0x737bab8, u=0x737c790) at src/http/ngx_http_upstream.c:1789
#4 0x000000000048039b in ngx_http_upstream_handler (ev=<optimized out>) at src/http/ngx_http_upstream.c:1272
#5 0x0000000000454512 in ngx_event_expire_timers () at src/event/ngx_event_timer.c:97
#6 0x0000000000454137 in ngx_process_events_and_timers (cycle=cycle@entry=0x6c84dd0) at src/event/ngx_event.c:266
#7 0x000000000045a642 in ngx_worker_process_cycle (cycle=cycle@entry=0x6c84dd0, data=data@entry=0x2) at src/os/unix/ngx_process_cycle.c:820
#8 0x0000000000459095 in ngx_spawn_process (cycle=cycle@entry=0x6c84dd0, proc=proc@entry=0x45a5d0 <ngx_worker_process_cycle>, data=data@entry=0x2, name=name@entry=0x601428 "worker process", respawn=respawn@entry=-3) at src/os/unix/ngx_process.c:198
#9 0x000000000045aa94 in ngx_start_worker_processes (cycle=0x6c84dd0, n=4, type=-3) at src/os/unix/ngx_process_cycle.c:396
#10 0x000000000045b381 in ngx_master_process_cycle (cycle=0x6c84dd0) at src/os/unix/ngx_process_cycle.c:135
#11 0x0000000000434b2c in main (argc=<optimized out>, argv=<optimized out>) at src/core/nginx.c:384
