Re: Parallel Full Hash Join

From: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
To: Justin Pryzby <pryzby(at)telsasoft(dot)com>
Cc: Melanie Plageman <melanieplageman(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Parallel Full Hash Join
Date: 2021-11-26 20:11:21
Message-ID: CA+hUKG+2Dno7rO-6XZ959CVMOSJbGAihR-vAbc26fcRzbz3Ctw@mail.gmail.com
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On Sun, Nov 21, 2021 at 4:48 PM Justin Pryzby <pryzby(at)telsasoft(dot)com> wrote:
> On Wed, Nov 17, 2021 at 01:45:06PM -0500, Melanie Plageman wrote:
> > Yes, this looks like that issue.
> >
> > I've attached a v8 set with the fix I suggested in [1] included.
> > (I added it to 0001).
>
> This is still crashing :(
> https://cirrus-ci.com/task/6738329224871936
> https://cirrus-ci.com/task/4895130286030848

I added a core file backtrace to cfbot's CI recipe a few days ago, so
now we have:

https://cirrus-ci.com/task/5676480098205696

#3 0x00000000009cf57e in ExceptionalCondition (conditionName=0x29cae8
"BarrierParticipants(&accessor->shared->batch_barrier) == 1",
errorType=<optimized out>, fileName=0x2ae561 "nodeHash.c",
lineNumber=lineNumber(at)entry=2224) at assert.c:69
No locals.
#4 0x000000000071575e in ExecParallelScanHashTableForUnmatched
(hjstate=hjstate(at)entry=0x80a60a3c8,
econtext=econtext(at)entry=0x80a60ae98) at nodeHash.c:2224

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