Re: [BUG] non archived WAL removed during production crash recovery

Hello.

At Wed, 1 Apr 2020 18:17:35 +0200, Jehan-Guillaume de Rorthais <jgdr@dalibo.com> wrote in 
> Please, find in attachment a patch implementing this.

The patch partially reintroduces the issue the patch have
fixed. Specifically a standby running a crash recovery wrongly marks a
WAL file as ".ready" if it is extant in pg_wal without accompanied by
.ready file.

Perhaps checking '.ready' before the checking for archive-mode would
be sufficient.

> Plus, I added a second commit to add one test in regard with this bug.
> 
> > Another is to make the startup process remove .ready file if necessary.
> 
> I'm not sure to understand this one.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center