Horton

Re: Assertion failure with barriers in parallel hash join

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Melanie Plageman <melanieplageman@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>, Postgres hackers <pgsql-hackers@lists.postgresql.org>
Date: 2021-03-17T05:58:02Z
Lists: pgsql-hackers 
On Wed, Mar 17, 2021 at 6:17 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> On Sat, Mar 6, 2021 at 9:56 AM Thomas Munro <thomas.munro@gmail.com> wrote:
> > While working on Melanie's Parallel Hash Full Join patch I remembered
> > that this (apparently extremely rare) race still needs fixing.  Here
> > is a slightly tidied version, which I'm adding to the next CF for CI
> > coverage.
>
> Pushed and back-patched.

According to BF animal elver there is something wrong with this
commit.  Looking into it.

Commits

  1. Fix race in parallel hash join batch cleanup, take II.

  2. Revert "Fix race in Parallel Hash Join batch cleanup."

  3. Fix race in Parallel Hash Join batch cleanup.

  4. Mop-up for wait event naming issues.