Re: BUG #17928: Standby fails to decode WAL on termination of primary

On Tue, Sep 19, 2023 at 9:53 PM Michael Paquier <michael@paquier.xyz> wrote:

On Tue, Sep 19, 2023 at 09:25:34PM +1200, Thomas Munro wrote:

The problem was that the Perl functions advance_XXX() would sometimes
see an "unflushed" insert position caused by hint records and other
incidental stuff, and then we'd write our contrived header at a
disconnected location after a bunch of (unwritten) zeroes.  The
solution in this version is to start each test with
emit_message($node, 0), which flushes a small record.

Thanks for the fixes!

I've tested this patch version on Debian 9 and it works fine now.
But as to wal_log_hints, I see that v7 patches work for REL_12_STABLE and
REL_13_STABLE, but not for other branches, though v6 patches definitely
failed on REL_12_STABLE and REL_13_STABLE too. So the behavior improved,
but not for all versions, for some reason (I haven't looked deeper yet).
Also I've noticed a few minor discrepancies in the patches.
A commit message in patch.15 contains the sentence "We should fix ...",
not "We could fix ...", as in commit messages for other versions.
Also, patch.12 contains a duplicated "Reviewed-by" string.
And may be "xlp_prev" is a typo?

Best regards,
Alexander