Re: "invalid record length" after restoring pg_basebackup

On 11/13/20 4:02 PM, Tom Lane wrote:
> Dennis Jacobfeuerborn <dennisml(at)conversis(dot)de> writes:
>> All of this works fine and the logs report that the db reaches a
>> consistent recovery state but as last entry it reports an "invalid
>> record length":
>
> This looks quite normal to me. If you'd pulled the power plug on the
> primary system at the time you made this backup, you would likely see
> the same message at the end of its crash recovery. Some sort of
> corrupt-WAL-entry report is expected at the end of WAL replay anytime
> you didn't have a clean shutdown.

But the system the backup was pulled from kept running fine. Also
wouldn't that make re-attaching the system to the primary impossible
since replication cannot be continued due to the broken WAL record?
What I would expect is that pg_basebackup only transfer healthy WAL
entries so that a restored system can pick up right after that with
streaming replication.

Regards,
Dennis