[pgpool-general: 4222] Re: pgpool segfault

Tatsuo Ishii ishii at postgresql.org
Wed Nov 18 12:40:05 JST 2015


Please type "bt" when gdb shows "(gdb)", and send the output. That's
the stack trace.

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp
> Hi,
> 
> Here is the info
> 
> # gdb /usr/bin/pgpool core-pgpool-11-0-0-8096-1447690344
> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-83.el6)
> Copyright (C) 2010 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".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /usr/bin/pgpool...(no debugging symbols found)...done.
> [New Thread 8096]
> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> Core was generated by `pgpool: md'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x000000000048e352 in appendStringInfoChar ()
> Missing separate debuginfos, use: debuginfo-install pgpool-II-pg93-3.4.3-1pgdg.rhel6.x86_64
> (gdb)
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Tatsuo Ishii [mailto:ishii at postgresql.org] 
> Sent: November-17-15 8:13 AM
> To: Ziyun Audrey Wang
> Cc: ishii at postgresql.org; pgpool-general at pgpool.net; Nabil Khoury
> Subject: Re: [pgpool-general: 4187] pgpool segfault
> 
> Thanks but the core is not very usefull for me because to take an accurate stack trace, I have to have identical environment as you. Can you please take a stack trace on the machine where the core dump files were generated. i.e.
> 
> gdb /usr/bin/pgpool core-pgpool-11-0-0-8096-1447690344
> 
>> bt (from gdb prompt)
> 
> Best regards,
> --
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
> Japanese:http://www.sraoss.co.jp
> 
>> 2nd core dump file
>> 
>> -----Original Message-----
>> From: Ziyun Audrey Wang
>> Sent: November-17-15 8:01 AM
>> To: 'Tatsuo Ishii'
>> Cc: pgpool-general at pgpool.net; Nabil Khoury
>> Subject: RE: [pgpool-general: 4187] pgpool segfault
>> 
>> Hello
>> 
>> We have been able to reproduce the problem and get the core dumps. Since there are many core dump files, I am sending two of them, one is from the starting time, one is the finish time and please let me know if you need more.
>> 
>> The step to reproduce is to trigger the failover.
>> 
>> Thanks!
>> 
>> Best Regards
>> Audrey
>> 
>> 
>> -----Original Message-----
>> From: Tatsuo Ishii [mailto:ishii at postgresql.org]
>> Sent: November-11-15 6:50 PM
>> To: Ziyun Audrey Wang
>> Cc: pgpool-general at pgpool.net
>> Subject: Re: [pgpool-general: 4187] pgpool segfault
>> 
>> Please send info either:
>> 
>> 1) stack trace info using gdb
>> 
>> or
>> 
>> 2) step to reproduce the problem
>> 
>> Best regards,
>> --
>> Tatsuo Ishii
>> SRA OSS, Inc. Japan
>> English: http://www.sraoss.co.jp/index_en.php
>> Japanese:http://www.sraoss.co.jp
>> 
>>> Hello,
>>> 
>>> We have
>>> # pgpool -version
>>> pgpool-II version 3.4.2 (tataraboshi)
>>> 
>>> in the system message log,
>>> 
>>> we found lots of segfault, like the following:
>>> 
>>> pgpool-00 kernel: pgpool[15458]: segfault at 0 ip 000000000042cb69 sp 
>>> 00007ffdb08d5fd0 error 4 in pgpool[400000+12d000]
>>> 
>>> pgpool-00 kernel: pgpool[27931]: segfault at 10 ip 0000000000430933 
>>> sp 00007ffc814d1370 error 4 in pgpool[400000+12d000]
>>> 
>>> what's the cause of this?
>>> 
>>> Thanks very much!
>>> 
>>> Best Regards
>>> Ziyun Audrey Wang
>>> 
>>> 
>>> 
>>> 


More information about the pgpool-general mailing list