Re: SegFault on 9.6.14

Thomas Munro <thomas.munro@gmail.com>

From: Thomas Munro <thomas.munro@gmail.com>

To: Jerry Sievers <gsievers19@comcast.net>

Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2019-07-16T23:11:41Z

Lists: pgsql-hackers

On Wed, Jul 17, 2019 at 11:06 AM Jerry Sievers <gsievers19@comcast.net> wrote:
> (gdb) p *scan->rs_parallel
> Cannot access memory at address 0x7fa673a54108

So I guess one question is: was it a valid address that's been
unexpectedly unmapped, or is the pointer corrupted?  Any chance you
can strace the backend and pull out the map, unmap calls?

-- 
Thomas Munro
https://enterprisedb.com

Commits

Don't shut down Gather[Merge] early under Limit.
- 1ad0df67c790 9.6.17 landed
- f7ae68aacd9d 10.12 landed
- d0ccfa9d6a3d 11.7 landed
- 1cc3a90c7551 12.2 landed
- 080313f8296f 13.0 landed
Prohibit shutting down resources if there is a possibility of back up.
- 2cd0acfdade8 12.0 cited
Fix buffer usage stats for parallel nodes.
- 19df1702f5c5 9.6.10 cited
- 85c9d3475e4f 12.0 cited
Fix crashes on plans with multiple Gather (Merge) nodes.
- fd7c0fa732d9 11.0 cited
Separate reinitialization of shared parallel-scan state from ExecReScan.
- 41b0dd987d44 11.0 cited