[pgpool-general: 5968] Re: wrong arguments for online recovery script

Benjamin Firl bf at wisit.com
Fri Mar 2 17:33:35 JST 2018


We have seen problems with online recovery in pgpool-II version 3.6.7
(subaruboshi). But we updated to 3.7.2 before we ware able to reproduce
and analyze it. So I suspect the same thing happened in 3.6.7, but I am
not 100% sure.
Adding a new lowest node id is a relatively rare case in our setup.


Kind regards
Benjamin Firl



On 03/02/2018 12:16 AM, Tatsuo Ishii wrote:
> I suspect it's a bug with 3.7.2. Have you seen similar issue with
> other Pgpool-II versions?
>
> Best regards,
> --
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
> Japanese:http://www.sraoss.co.jp
>
>> our script for online recovery stage1 seems to get wrong arguments
>> sometimes and thus is failing.
>>
>> We log the arguments, so on a successful run it prints something like
>> that on the master node:
>>
>> recovery_1st_stage.sh
>> all args: /var/lib/postgresql/9.5/main 10.0.1.25
>> /var/lib/postgresql/9.5/main 5432
>> data: /var/lib/postgresql/9.5/main
>> recovery target: 10.0.1.25
>> recovery data: /var/lib/postgresql/9.5/main
>>
>>
>> If recovery fails, we get this:
>>
>> recovery_1st_stage.sh
>> all args: /var/lib/postgresql/9.5/main localhost 5432
>> data: /var/lib/postgresql/9.5/main
>> recovery target: localhost
>> recovery data: 5432
>> unable to recover myself....exiting
>> 2018-03-01 14:31:59 CET [10517-1] postgres at template1 ERROR: 
>> pgpool_recovery failed
>> 2018-03-01 14:31:59 CET [10517-2] postgres at template1 STATEMENT:  SELECT
>> pgpool_recovery('recovery_1st_stage.sh', 'localhost', '', '5432')
>>
>>
>> This seems to happen, if the new node has a lower id than the master
>> node. But normally adding a new node with lower id should not be a
>> problem, am I correct? 
>> We are using PostgreSQL 9.5.10 and pgpool-II version 3.7.2 (amefuriboshi).
>> Thanks for your help.
>>
>>
>> Kind regards
>> Benjamin Firl
>>
>>
>>
>>
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