Re: subscriptionCheck failures on nightjar

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: subscriptionCheck failures on nightjar
Date: 2019-09-18 00:58:15
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On Tue, Sep 17, 2019 at 09:45:10PM +0200, Tomas Vondra wrote:
> FWIW I agree with Andres that there probably is an actual bug. The file
> should not just disappear like this, it's clearly unexpected so the
> PANIC does not seem entirely inappropriate.


> I've tried reproducing the issue on my local systems, with the extra
> sleeps between fsyncs and so on, but I haven't managed to trigger it so
> far :-(

On my side, I have let this thing run for a couple of hours with a
patched version to include a sleep between the rename and the sync but
I could not reproduce it either:
while true; do
echo "Attempt $attempt"
cd $HOME/postgres/src/test/recovery/
PROVE_TESTS=t/ make check > /dev/null 2>&1
if [ $ERRNUM != 0 ]; then
echo "Failed at attempt $attempt"
exit $ERRNUM
> Yes, it should be moved to the older section - it's clearly a v11 bug.

And agreed.

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