[pgpool-general: 4218] Re: pgpool segfault
Ziyun Audrey Wang
ziyun.wang at ericsson.com
Tue Nov 17 22:18:29 JST 2015
Here is the info
# gdb /usr/bin/pgpool core-pgpool-11-0-0-8096-1447690344
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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
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)
SRA OSS, Inc. Japan
> 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
> 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.
> Best Regards
> -----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
> 2) step to reproduce the problem
> Best regards,
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
>> 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: segfault at 0 ip 000000000042cb69 sp
>> 00007ffdb08d5fd0 error 4 in pgpool[400000+12d000]
>> pgpool-00 kernel: pgpool: 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
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