Horton

Re: BUG #16104: Invalid DSA Memory Alloc Request in Parallel Hash

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, Andres Freund <andres@anarazel.de>, James Coleman <jtc331@gmail.com>, PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Date: 2019-12-14T04:01:05Z
Lists: pgsql-bugs 
On Wed, Dec 11, 2019 at 6:32 AM Tomas Vondra
<tomas.vondra@2ndquadrant.com> wrote:
> The annoying thing is that it's the workers that crash, and the leader
> failed to notice that, so it was waiting in WaitForParallelWorkersToExit
> forever. Not sure what the issue is.

That's bad.  Some edge case in
WaitForBackgroundWorkerShutdown()/GetBackgroundWorkerPid() that is
b0rked perhaps?  Can you reproduce it, and tell us what the stack
looks like, maybe on a new thread?

Commits

  1. Rotate instead of shifting hash join batch number.