Re: [HACKERS] Postgres process invoking exit resulting in sh-QUIT core

Hi Craig,

Here is bt after installing all the missing debuginfo packages.

(gdb) bt
#0 0x000000fff7682f18 in do_lookup_x (undef_name=undef_name(at)entry=0xfff75cece5 "_Jv_RegisterClasses", new_hash=new_hash(at)entry=2681263574,
old_hash=old_hash(at)entry=0xffffa159b8, ref=0xfff75ceac8, result=result(at)entry=0xffffa159a0, scope=<optimized out>, i=1, version=version(at)entry=0x0,
flags=flags(at)entry=1, skip=skip(at)entry=0x0, type_class=type_class(at)entry=0, undef_map=undef_map(at)entry=0xfff76a9478) at dl-lookup.c:444
#1 0x000000fff76839a0 in _dl_lookup_symbol_x (undef_name=0xfff75cece5 "_Jv_RegisterClasses", undef_map=0xfff76a9478, ref=0xffffa15a90,
symbol_scope=0xfff76a9980, version=0x0, type_class=<optimized out>, flags=<optimized out>, skip_map=0x0) at dl-lookup.c:833
#2 0x000000fff7685730 in elf_machine_got_rel (lazy=1, map=0xfff76a9478) at ../sysdeps/mips/dl-machine.h:870
#3 elf_machine_runtime_setup (profile=<optimized out>, lazy=1, l=0xfff76a9478) at ../sysdeps/mips/dl-machine.h:916
#4 _dl_relocate_object (scope=0xfff76a9980, reloc_mode=<optimized out>, consider_profiling=0) at dl-reloc.c:259
#5 0x000000fff767ba10 in dl_main (phdr=<optimized out>, phdr(at)entry=0x120000040, phnum=<optimized out>, phnum(at)entry=8,
user_entry=user_entry(at)entry=0xffffa15cf0, auxv=<optimized out>) at rtld.c:2070
#6 0x000000fff7692e3c in _dl_sysdep_start (start_argptr=<optimized out>, dl_main=0xfff7679a98 <dl_main>) at ../elf/dl-sysdep.c:249
#7 0x000000fff767d0d8 in _dl_start_final (arg=arg(at)entry=0xffffa16410, info=info(at)entry=0xffffa15d80) at rtld.c:307
#8 0x000000fff767d3d8 in _dl_start (arg=0xffffa16410) at rtld.c:415
#9 0x000000fff7679380 in __start () from /lib64/ld.so.1

Please see if this could help in analysing the issue.

Regards,
Sandhya

From: Craig Ringer [mailto:craig(at)2ndquadrant(dot)com]
Sent: Friday, July 07, 2017 1:53 PM
To: K S, Sandhya (Nokia - IN/Bangalore) <sandhya(dot)k_s(at)nokia(dot)com>
Cc: pgsql-bugs <pgsql-bugs(at)postgresql(dot)org>; PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>; T, Rasna (Nokia - IN/Bangalore) <rasna(dot)t(at)nokia(dot)com>; Itnal, Prakash (Nokia - IN/Bangalore) <prakash(dot)itnal(at)nokia(dot)com>
Subject: Re: [HACKERS] Postgres process invoking exit resulting in sh-QUIT core

On 7 July 2017 at 15:41, K S, Sandhya (Nokia - IN/Bangalore) <sandhya(dot)k_s(at)nokia(dot)com<mailto:sandhya(dot)k_s(at)nokia(dot)com>> wrote:
Hi Craig,

The scenario is lock and unlock of the system for 30 times. During this scenario 5 sh-QUIT core is generated. GDB of 5 core is pointing to different locations.
I have attached output for 2 such instance.

You seem to be missing debug symbols. Install appropriate debuginfo packages.

--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services