RE: Logical replication type- WAL recovery fails and changes the size of wal segment in archivedir

Hi Laurenz,

Thanks a lot! 

Regards,
Meera

-----Original Message-----
From: Laurenz Albe <laurenz.albe@cybertec.at> 
Sent: Wednesday, June 5, 2024 3:56 PM
To: Meera Nair <mnair@commvault.com>; pgsql-general@lists.postgresql.org
Cc: Punit Pranesh Koujalgi <pkoujalgi@commvault.com>; B Ganesh Kishan <bkishan@commvault.com>
Subject: Re: Logical replication type- WAL recovery fails and changes the size of wal segment in archivedir

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On Wed, 2024-06-05 at 06:36 +0000, Meera Nair wrote:
> 2024-06-05 11:41:32.369 IST [54369] LOG:  restored log file 
> "00000005000000010000006A" from archive
> 2024-06-05 11:41:33.112 IST [54369] LOG:  restored log file 
> "00000005000000010000006B" from archive
> cp: cannot stat ‘/home/pgsql/wmaster/00000005000000010000006C’: No 
> such file or directory
> 2024-06-05 11:41:33.167 IST [54369] LOG:  redo done at 1/6B000100
> 2024-06-05 11:41:33.172 IST [54369] FATAL:  archive file 
> "00000005000000010000006B" has wrong size: 0 instead of 16777216
> 2024-06-05 11:41:33.173 IST [54367] LOG:  startup process (PID 54369) 
> exited with exit code 1
> 2024-06-05 11:41:33.173 IST [54367] LOG:  terminating any other active 
> server processes
> 2024-06-05 11:41:33.174 IST [54375] FATAL:  archive command was 
> terminated by signal 3: Quit
> 2024-06-05 11:41:33.174 IST [54375] DETAIL:  The failed archive 
> command was: cp pg_wal/00000005000000010000006B 
> /home/pgsql/wmaster/00000005000000010000006B
> 2024-06-05 11:41:33.175 IST [54367] LOG:  archiver process (PID 54375) 
> exited with exit code 1
> 2024-06-05 11:41:33.177 IST [54367] LOG:  database system is shut down
>
> Here ‘/home/pgsql/wmaster’ is my archivedir (the folder where WAL 
> segments are restored from)
>
> Before attempting start, size of
> 00000005000000010000006B file was 16 MB.
> After failing to detect 00000005000000010000006C, there is a FATAL 
> error saying wrong size for 00000005000000010000006B Now the size of 00000005000000010000006B is observed as 2 MB.
Sizeof all other WAL segments remain 16 MB.
 
>
> -rw------- 1 postgres postgres  2359296 Jun  5 11:34 
> 00000005000000010000006B

That looks like you have "archive_mode = always", and "archive_command" writes back to the archive.  Don't do that.

Yours,
Laurenz Albe