[pgpool-general: 8035] Re: PgPool-II 4.2.7: several segfaults on CentOS 8
shacky
shacky83 at gmail.com
Wed Mar 2 23:00:05 JST 2022
Thanks!
In the meantime, do you think that upgrading to 4.3 could solve the problem?
Thank you
Il giorno mer 2 mar 2022 alle ore 14:51 Tatsuo Ishii <ishii at sraoss.co.jp>
ha scritto:
> Ok, It seems the segfault occured in watchdog.
>
> Usama,
> Can you please take a look at this?
>
> Best reagards,
> --
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
> Japanese:http://www.sraoss.co.jp
>
> From: shacky <shacky83 at gmail.com>
> Subject: Re: [pgpool-general: 8031] Re: PgPool-II 4.2.7: several segfaults
> on CentOS 8
> Date: Wed, 2 Mar 2022 12:57:50 +0100
> Message-ID: <CAPz3gm=
> wPi_FqSJpnN99gKFBtg0Lg-0x7RiqAPdytfqra8saYQ at mail.gmail.com>
>
> > Here is the complete bt output:
> >
> ===================================================================================================
> > DEV root at proxy2-dev ~# gdb /usr/bin/pgpool
> >
> /root/pgpool-coredumps/core.pgpool.26.e120553488834d47bff3c72a21a9bba1.694540.1646129274000000
> > GNU gdb (GDB) Red Hat Enterprise Linux 8.2-16.el8
> > Copyright (C) 2018 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later <
> http://gnu.org/licenses/gpl.html
> >>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law.
> > Type "show copying" and "show warranty" for details.
> > This GDB was configured as "x86_64-redhat-linux-gnu".
> > Type "show configuration" for configuration details.
> > For bug reporting instructions, please see:
> > <http://www.gnu.org/software/gdb/bugs/>.
> > Find the GDB manual and other documentation resources online at:
> > <http://www.gnu.org/software/gdb/documentation/>.
> >
> > For help, type "help".
> > Type "apropos word" to search for commands related to "word"...
> > Reading symbols from /usr/bin/pgpool...Reading symbols from
> > /usr/lib/debug/usr/bin/pgpool-4.2.5-1pgdg.rhel8.x86_64.debug...done.
> > done.
> >
> > warning: Can't open file (null) during file-backed mapping note
> processing
> > [New LWP 694540]
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library "/lib64/libthread_db.so.1".
> > Core was generated by `pgpool: watchdog '.
> > Program terminated with signal SIGSEGV, Segmentation fault.
> > #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120
> > 120 movdqu (%rax), %xmm4
> > (gdb) bt
> > #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120
> > #1 0x00007fe9b70ac0af in _IO_vfprintf_internal (s=s at entry
> =0x7ffdb575f7c0,
> > format=format at entry=0x55d3177fd2a8 "STATE MACHINE INVOKED WITH EVENT =
> %s
> > Current State = %s",
> > ap=ap at entry=0x7ffdb575f9b0) at vfprintf.c:1638
> > #2 0x00007fe9b7164bfd in ___vsnprintf_chk (s=s at entry=0x55d3177fd6b8
> "STATE
> > MACHINE INVOKED WITH EVENT = it has found us again", maxlen=<optimized
> > out>, maxlen at entry=1024,
> > flags=flags at entry=1, slen=slen at entry=18446744073709551615,
> > format=format at entry=0x55d3177fd2a8 "STATE MACHINE INVOKED WITH EVENT =
> %s
> > Current State = %s",
> > args=args at entry=0x7ffdb575f9b0) at vsnprintf_chk.c:63
> > #3 0x000055d316dc9013 in vsnprintf (__ap=0x7ffdb575f9b0,
> > __fmt=0x55d3177fd2a8 "STATE MACHINE INVOKED WITH EVENT = %s Current
> State =
> > %s", __n=1024,
> > __s=0x55d3177fd6b8 "STATE MACHINE INVOKED WITH EVENT = it has found
> us
> > again") at /usr/include/bits/stdio2.h:80
> > #4 pvsnprintf (buf=0x55d3177fd6b8 "STATE MACHINE INVOKED WITH EVENT = it
> > has found us again", len=len at entry=1024,
> > fmt=fmt at entry=0x55d3177fd2a8 "STATE MACHINE INVOKED WITH EVENT = %s
> > Current State = %s", args=args at entry=0x7ffdb575f9b0) at
> utils/psprintf.c:126
> > #5 0x000055d316e11eab in appendStringInfoVA (str=str at entry
> =0x7ffdb575f990,
> > fmt=fmt at entry=0x55d3177fd2a8 "STATE MACHINE INVOKED WITH EVENT = %s
> Current
> > State = %s",
> > args=args at entry=0x7ffdb575f9b0) at stringinfo.c:138
> > #6 0x000055d316ddeabf in errmsg (fmt=fmt at entry=0x55d316f577d0 "STATE
> > MACHINE INVOKED WITH EVENT = %s Current State = %s") at
> > ../../src/utils/error/elog.c:665
> > #7 0x000055d316e30c4b in watchdog_state_machine
> > (event=event at entry=WD_EVENT_I_AM_APPEARING_FOUND,
> > wdNode=wdNode at entry=0x55d3177fbcf8, pkt=pkt at entry=0x0,
> > clusterCommand=clusterCommand at entry=0x0) at watchdog.c:5394
> > #8 0x000055d316e34a7b in cluster_service_message_processor
> > (pkt=0x55d317804898, wdNode=0x55d3177fbcf8) at watchdog.c:4030
> > #9 standard_packet_processor (wdNode=wdNode at entry=0x55d3177fbcf8,
> > pkt=pkt at entry=0x55d317804898) at watchdog.c:4202
> > #10 0x000055d316e312cd in watchdog_state_machine_nw_isolation
> > (clusterCommand=<optimized out>, pkt=<optimized out>, wdNode=<optimized
> > out>, event=<optimized out>)
> > at watchdog.c:6458
> > #11 watchdog_state_machine (event=event at entry=WD_EVENT_PACKET_RCV,
> > wdNode=wdNode at entry=0x55d3177fbcf8, pkt=pkt at entry=0x55d317804898,
> > clusterCommand=clusterCommand at entry=0x0)
> > at watchdog.c:5561
> > #12 0x000055d316e38514 in read_sockets (rmask=rmask at entry
> =0x7ffdb57604e0,
> > pending_fds_count=pending_fds_count at entry=1) at watchdog.c:8207
> > #13 0x000055d316e3b04f in watchdog_main () at watchdog.c:3500
> > #14 0x000055d316e3bb81 in fork_watchdog_child () at watchdog.c:1127
> > #15 initialize_watchdog () at watchdog.c:625
> > #16 0x000055d316d73088 in reaper () at main/pgpool_main.c:2428
> > #17 0x000055d316d79e28 in PgpoolMain (discard_status=<optimized out>,
> > clear_memcache_oidmaps=<optimized out>) at main/pgpool_main.c:473
> > #18 0x000055d316d7053c in main (argc=<optimized out>,
> argv=0x7ffdb576d1b8)
> > at main/main.c:365
> >
> ===================================================================================================
> >
> > Thank you!
> >
> > Il giorno mer 2 mar 2022 alle ore 05:05 Tatsuo Ishii <ishii at sraoss.co.jp
> >
> > ha scritto:
> >
> >> Can you please share the result of gdb command "bt"? Otherwise we
> >> cannot figure out which place of pgpool is related to the problem.
> >> --
> >> Tatsuo Ishii
> >> SRA OSS, Inc. Japan
> >> English: http://www.sraoss.co.jp/index_en.php
> >> Japanese:http://www.sraoss.co.jp
> >>
> >> > This is the coredump of the segmentation fault happened on proxy2-dev:
> >> >
> >> >
> >>
> ===================================================================================================
> >> > DEV root at proxy2-dev /v/l/s/coredump# gdb /usr/bin/pgpool
> >> >
> >>
> /root/pgpool-coredumps/core.pgpool.26.e120553488834d47bff3c72a21a9bba1.694540.1646129274000000
> >> > GNU gdb (GDB) Red Hat Enterprise Linux 8.2-16.el8
> >> > Copyright (C) 2018 Free Software Foundation, Inc.
> >> > License GPLv3+: GNU GPL version 3 or later <
> >> http://gnu.org/licenses/gpl.html
> >> >>
> >> > This is free software: you are free to change and redistribute it.
> >> > There is NO WARRANTY, to the extent permitted by law.
> >> > Type "show copying" and "show warranty" for details.
> >> > This GDB was configured as "x86_64-redhat-linux-gnu".
> >> > Type "show configuration" for configuration details.
> >> > For bug reporting instructions, please see:
> >> > <http://www.gnu.org/software/gdb/bugs/>.
> >> > Find the GDB manual and other documentation resources online at:
> >> > <http://www.gnu.org/software/gdb/documentation/>.
> >> >
> >> > For help, type "help".
> >> > Type "apropos word" to search for commands related to "word"...
> >> > Reading symbols from /usr/bin/pgpool...Reading symbols from
> >> > /usr/lib/debug/usr/bin/pgpool-4.2.5-1pgdg.rhel8.x86_64.debug...done.
> >> > done.
> >> >
> >> > warning: Can't open file (null) during file-backed mapping note
> >> processing
> >> > [New LWP 694540]
> >> > [Thread debugging using libthread_db enabled]
> >> > Using host libthread_db library "/lib64/libthread_db.so.1".
> >> > Core was generated by `pgpool: watchdog
> '.
> >> > Program terminated with signal SIGSEGV, Segmentation fault.
> >> > #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120
> >> > 120 movdqu (%rax), %xmm4
> >> >
> >>
> ===================================================================================================
> >> >
> >> > Thanks.
> >> >
> >> > Il giorno mar 1 mar 2022 alle ore 17:39 shacky <shacky83 at gmail.com>
> ha
> >> > scritto:
> >> >
> >> >> Hi,
> >> >> I am experiencing many segfaults on PgPool-II 4.2.7 installed on two
> >> >> different environments (production and test).
> >> >>
> >> >> Each environment is composed by three different PgPool-II nodes
> >> configured
> >> >> in a PgPool-II watchdog cluster, and I am experiencing segfaults on
> >> every 6
> >> >> PgPool-II nodes.
> >> >>
> >> >> The 6 PgPool-II nodes are distributed on 4 different physical
> servers,
> >> so
> >> >> it's very unlikely that it's due to some hardware problems.
> >> >>
> >> >> These are the snippets of the segfaults notifications:
> >> >>
> >> >>
> >>
> ===================================================================================================
> >> >> DEV root at proxy1-dev ~# dmesg|grep pgpool
> >> >> [ 15.970081] pgpool[834]: segfault at 8 ip 00007fb6069f5d8a sp
> >> >> 00007fff848e7448 error 4 in libc-2.28.so[7fb60695c000+1bc000]
> >> >> [ 17.672642] pgpool[1336]: segfault at 8 ip 00007fb6069f5d8a sp
> >> >> 00007fff848e73e8 error 4 in libc-2.28.so[7fb60695c000+1bc000]
> >> >>
> >> >> DEV root at proxy2-dev ~# dmesg|grep pgpool
> >> >> [ 2109.530239] pgpool[848]: segfault at 8 ip 00007f372d024d8a sp
> >> >> 00007ffe5126c7d8 error 4 in libc-2.28.so[7f372cf8b000+1bc000]
> >> >> [ 4752.698303] pgpool[22406]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f298 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >> [ 4761.219745] pgpool[22450]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f238 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >> [7089616.463274] pgpool[22568]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f208 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >> [7090394.285732] pgpool[661708]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f208 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >> [7090504.438435] pgpool[661929]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f208 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >> [7090528.565248] pgpool[661991]: segfault at 8 ip 00007fe9b70f3d8a sp
> >> >> 00007ffdb575f238 error 4 in libc-2.28.so[7fe9b705a000+1bc000]
> >> >>
> >> >> DEV root at proxy3-dev ~# dmesg|grep pgpool
> >> >> [ 2085.795853] pgpool[879]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6678 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7088526.747095] pgpool[20105]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d65e8 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7088528.639860] pgpool[946407]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089324.627060] pgpool[946415]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089384.787587] pgpool[946506]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089580.047313] pgpool[946521]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089591.340077] pgpool[946547]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089597.788270] pgpool[946556]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7089614.064323] pgpool[946565]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7090492.104936] pgpool[946574]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d65e8 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >> [7090575.965820] pgpool[946743]: segfault at 8 ip 00007f9f45e57d8a sp
> >> >> 00007ffc605d6618 error 4 in libc-2.28.so[7f9f45dbe000+1bc000]
> >> >>
> >> >> PROD root at proxy1-prod ~# dmesg|grep pgpool
> >> >> [ 6.631205] pgpool[814]: segfault at 8 ip 00007fe9729dbd8a sp
> >> >> 00007ffe7174ae88 error 4 in libc-2.28.so[7fe972942000+1bc000]
> >> >> [ 17.054962] pgpool[1288]: segfault at 8 ip 00007fe9729dbd8a sp
> >> >> 00007ffe7174ae28 error 4 in libc-2.28.so[7fe972942000+1bc000]
> >> >> [868124.710835] pgpool[1415]: segfault at 8 ip 00007fe9729dbd8a sp
> >> >> 00007ffe7174ae28 error 4 in libc-2.28.so[7fe972942000+1bc000]
> >> >> [868127.082112] pgpool[1632535]: segfault at 8 ip 00007fe9729dbd8a sp
> >> >> 00007ffe7174ae28 error 4 in libc-2.28.so[7fe972942000+1bc000]
> >> >>
> >> >> PROD root at proxy2-prod ~# dmesg|grep pgpool
> >> >> [ 16.783629] pgpool[835]: segfault at 8 ip 00007f5f87877d8a sp
> >> >> 00007ffe3d47eb08 error 4 in libc-2.28.so[7f5f877de000+1bc000]
> >> >> [ 21.012660] pgpool[1381]: segfault at 8 ip 00007f5f87877d8a sp
> >> >> 00007ffe3d47eaa8 error 4 in libc-2.28.so[7f5f877de000+1bc000]
> >> >> [ 1978.102123] pgpool[1400]: segfault at 8 ip 00007f5f87877d8a sp
> >> >> 00007ffe3d47eaa8 error 4 in libc-2.28.so[7f5f877de000+1bc000]
> >> >>
> >> >> PROD root at proxy3-prod ~# dmesg|grep pgpool
> >> >> [ 13.567572] pgpool[826]: segfault at 8 ip 00007f4359c84d8a sp
> >> >> 00007fff04ddf008 error 4 in libc-2.28.so[7f4359beb000+1bc000]
> >> >> [ 15.559884] pgpool[1384]: segfault at 8 ip 00007f4359c84d8a sp
> >> >> 00007fff04ddefa8 error 4 in libc-2.28.so[7f4359beb000+1bc000]
> >> >> [1094174.197742] pgpool[1398]: segfault at 8 ip 00007f4359c84d8a sp
> >> >> 00007fff04ddef78 error 4 in libc-2.28.so[7f4359beb000+1bc000]
> >> >>
> >> >>
> >>
> ===================================================================================================
> >> >>
> >> >> The operating system is CentOS 8 (fully updated) with these PgPool-II
> >> >> packages installed:
> >> >>
> >> >>
> >>
> ===================================================================================================
> >> >> PROD root at proxy3 ~# rpm -qa|grep -i pgpool
> >> >> pgpool-II-pg12-4.2.7-1pgdg.rhel8.x86_64
> >> >> pgpool-II-release-4.2-1.noarch
> >> >>
> >> >>
> >>
> ===================================================================================================
> >> >>
> >> >> Could you help me to understand what's going on, please?
> >> >>
> >> >> Thank you very much!
> >> >> Bye
> >> >>
> >>
>
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