On 03/04/2018 04:11 AM, Thomas Munro wrote: > On Sun, Mar 4, 2018 at 4:07 PM, Tomas Vondra > <tomas.von...@2ndquadrant.com> wrote: >> I've started "make check" with parallel_schedule tweaked to contain many >> select_parallel runs, and so far I've seen a couple of failures like >> this (about 10 failures out of 1500 runs): >> >> select count(*) from tenk1, tenk2 where tenk1.hundred > 1 and >> tenk2.thousand=0; >> ! ERROR: lost connection to parallel worker >> >> I have no idea why the worker fails (no segfaults in dmesg, nothing in >> posgres log), or if it's related to the issue discussed here at all. > > That sounds like the new defences from > 2badb5afb89cd569500ef7c3b23c7a9d11718f2f. >
Yeah. But I wonder why the worker fails at all, or how to find that. -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services