Re: WIP/PoC for parallel backup

On Mon, Mar 16, 2020 at 11:52 AM Asif Rehman <asifr(dot)rehman(at)gmail(dot)com> wrote:

>
>
> On Mon, Mar 16, 2020 at 11:08 AM Rajkumar Raghuwanshi <
> rajkumar(dot)raghuwanshi(at)enterprisedb(dot)com> wrote:
>
>> Thanks for the patches.
>>
>> I have verified reported issues with new patches, issues are fixed now.
>>
>> I got another observation where If a new slot name given without -C
>> option, it leads to server crash error.
>>
>> [edb(at)localhost bin]$ ./pg_basebackup -p 5432 -j 4 -D /tmp/bkp --slot
>> test_bkp_slot
>> pg_basebackup: error: could not send replication command
>> "START_REPLICATION": ERROR: replication slot "test_bkp_slot" does not exist
>> pg_basebackup: error: could not list backup files: server closed the
>> connection unexpectedly
>> This probably means the server terminated abnormally
>> before or while processing the request.
>> pg_basebackup: removing data directory "/tmp/bkp"
>>
>
> It seems to be an expected behavior. The START_BACKUP command has been
> executed, and
> pg_basebackup tries to start a WAL streaming process with a non-existent
> slot, which results in
> an error. So the backup is aborted while terminating all other processes.
>
I think error message can be improved. current error message looks like
database server is crashed.

on PG same is existing with exit 1.
[edb(at)localhost bin]$ ./pg_basebackup -p 5432 -D /tmp/bkp --slot
test_bkp_slot
pg_basebackup: error: could not send replication command
"START_REPLICATION": ERROR: replication slot "test_bkp_slot" does not exist
pg_basebackup: error: child process exited with exit code 1
pg_basebackup: removing data directory "/tmp/bkp"

>
>
> --
> Asif Rehman
> Highgo Software (Canada/China/Pakistan)
> URL : www.highgo.ca
>
>