Re: BUG #19105: Parallel Hash Join crash when work_mem is small

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
Cc: nageshdbaa(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: BUG #19105: Parallel Hash Join crash when work_mem is small
Date: 2025-11-09 23:40:55
Message-ID: 1715740.1762731655@sss.pgh.pa.us
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Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> On Mon, Nov 10, 2025 at 4:23 AM PG Bug reporting form
> <noreply(at)postgresql(dot)org> wrote:
>> ERROR: could not attach to dynamic shared area
>> DETAIL: invalid dsa_handle

> ereport(ERROR,
> (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
> errmsg("could not attach to dynamic shared area")));

> Where do we emit that DETAIL message?

I'd not picked up on that point, but you're right: we don't emit any
such DETAIL anywhere, not in current and not in 16.2 either. Must
be a locally-modified tree, or maybe just a copy-paste error in the
report?

regards, tom lane

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