Re: pg_basebackup

On Mon, 2023-11-20 at 07:30 +0100, Matthias Apitz wrote:
> We're facing in a customer installation (PostgreSQL 13.1 on Linux) the
> following problem for the first time and not reproducible:

13.1?  Your immediate reaction should be "update to the latest minor release".

> ${BINDIR}/pg_basebackup -U ${DBSUSER} -Ft -z -D ${BACKUPDIR}-${DATE}-${NUM}
>
> The resulting stdout/stderr of the script:
>
> 16.11.2023-20:20:02: pg_basebackup the cluster to /Backup/postgres/sisis-20231116-1 ...
> pg_basebackup: could not receive data from WAL stream: server closed the connection unexpectedly
>         This probably means the server terminated abnormally
>         before or while processing the request.
> pg_basebackup: child process exited with error 1
>
> pg-error.log:
>
> 2023-11-16 20:34:13.538 CET [6250] LOG:  terminating walsender process due to replication timeout
>
> Why the PostgreSQL server says something about "replication", we do
> pg_basebackup?

Because "pg_basebackup" uses a replication connection.

> Some more information:
>
> - wal_sender_timeout has default value (60s)

Increase "wal_sender_timeout", perhaps to 0 (which means "infinite").

Yours,
Laurenz Albe