On Tue, Nov 17, 2020 at 11:59:10AM -0500, Jeremy Wilson wrote:
> pg_restore: WARNING:  terminating connection because of crash of another 
> server process
> DETAIL:  The postmaster has commanded this server process to roll back the 
> current transaction and exit, because another server process exited 
> abnormally and possibly corrupted shared memory.
> HINT:  In a moment you should be able to reconnect to the database and repeat 
> your command.
> pg_restore: creating COMMENT "public.FUNCTION "st_isempty"("rast" 
> "public"."raster")"
> pg_restore: while PROCESSING TOC:
> pg_restore: from TOC entry 5338; 0 0 COMMENT FUNCTION "st_isempty"("rast" 
> "public"."raster") postgres
> pg_restore: error: could not execute query: server closed the connection 
> unexpectedly
>         This probably means the server terminated abnormally
>         before or while processing the request.
> Command was: COMMENT ON FUNCTION "public"."st_isempty"("rast" 
> "public"."raster") IS 'args: rast - Returns true if the raster is empty 
> (width = 0 and height = 0). Otherwise, returns false.’;

My guess is that this is a crash in the PostGIS shared library.  I would
ask the PostGIS team if they know of any crash cases, and if not, I
think you need to do a pg_dump of the database and test-load it into a
new database to see what query makes it fail, and then load debug
symbols and do a backtrace of the stack at the point of the crash. 
Yeah, not fun.

-- 
  Bruce Momjian  <br...@momjian.us>        https://momjian.us
  EnterpriseDB                             https://enterprisedb.com

  The usefulness of a cup is in its emptiness, Bruce Lee



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