On Tue, 1 Feb 2005, Robin Chauhan wrote:

> I tried asking on postgis-users@postgis.refractions.net, and Mark
> Cave-Ayland suggested
> I ask you folks.
>
> I installed PostGIS, which appeared to work just fine. The I
> installed contrib/btree_gist, and since then I've had issues.

Robin, could you create simple test suite which illustrates your
problem. Try to isolate possible reason, for example, including
only btree_gist. This would helps us reproduce your problem.
Also, if you have a chance try newer version of postgresql.


>
> Some background: My postgres setup is on Red Hat linux, installed
> from RPMs. It is a shared hosting environment, and postgres source
> was not installed. So to build PostGIS , I checked the version
> number, and downloaded the corresponding source.
>
> cp_test=# select version();
> version
> ---------------------------------------------------------------------
> PostgreSQL 7.3.2 on i686-pc-linux-gnu, compiled by GCC egcs-2.91.66
> (1 row)
>
> I installed PostGIS 0.91:
>
> cp_test=# select postgis_version();
> postgis_version
> ---------------------------------------
> 0.9 USE_GEOS=0 USE_PROJ=0 USE_STATS=1
>
> I ran postgis.sql without a problem. I also installed
> contrib/btree_gist but I get a crash when creating a gist index:
>
> cp_test=# create index trp_pool_index2 on trips using gist (
> trp_matchpool, trp_org_geom gist_geometry_ops );
> server closed the connection unexpectedly
> This probably means the server terminated abnormally
> before or while processing the request.
> The connection to the server was lost. Attempting reset: Failed.
>
>
> Also, there is now another way to crash it: the first update query
> works, the second causes a crash:
>
> cp_test=# Update trips set trp_org_geom=GeomFromText( 'POINT ('
> ||trp_org_lat||' '||trp_org_long ||')'::text , -1 ) where
> tripid=355038;
> UPDATE 1
>
> cp_test=# Update trips set trp_org_geom=GeomFromText( 'POINT ('
> ||trp_org_lat||' '||trp_org_long ||')'::text , -1 ) where
> tripid=355034;
> server closed the connection unexpectedly
> This probably means the server terminated abnormally
> before or while processing the request.
> The connection to the server was lost. Attempting reset: Failed.
> !#
>
> Note the record that causes the crash has currently an empty
> trp_org_geom, the other does not:
>
> cp_test=# select
> tripid,trp_matchpool,trp_org_lat,trp_org_long,trp_ org_geom,trp_dest_geom
> from trips where tripid in (355038,355034);
> tripid | trp_matchpool | trp_org_lat | trp_org_long |
> trp_org_geom | trp_dest_geom
> --------+---------------+-------------+--------------+------------------------------------+-------------------------------------
> 355038 | -1 | 43.55059 | -80.232725 |
> SRID=-1;POINT(43.55059 -80.232725) | SRID=-1;POINT(43.769255
> -79.409203)
> 355034 | -104 | 46.977101 | -70.552437 |
> |
> (2 rows)
>
>
> My trips table is as follows:
>
> Table "public.trips"
> Column | Type | Modifiers
> ------------------+-----------------------------+----------------------------------------------------
> tripid | integer | not null default
> nextval('trips_tripid_seq'::text)
> ...
> trp_matchpool | integer | not null default '-1'
> ...
> trp_org_lat | double precision | not null default '0'
> trp_org_long | double precision | not null default '0'
> trp_dest_lat | double precision | not null default '0'
> trp_dest_long | double precision | not null default '0'
> ...
> trp_org_geom | geometry |
> trp_dest_geom | geometry |
> ...
> Indexes: trips_pkey primary key btree (tripid),
> personid_trips_index btree (personid),
> trp_loc_index gist (trp_org_geom, trp_dest_geom),
> trp_org_index gist (trp_org_geom)
> Check constraints: "enforce_srid_trp_org_geom" (srid(trp_org_geom) = -1)
> "enforce_geotype_trp_org_geom"
> ((geometrytype(trp_org_geom) = 'POINT'::text) OR (trp_org_geom IS
> NULL))
> "enforce_srid_trp_dest_geom" (srid(trp_dest_geom) = -1)
> "enforce_geotype_trp_dest_geom"
> ((geometrytype(trp_dest_geom) = 'POINT'::text) OR (trp_dest_geom IS
> NULL))
>
>
> Here is the bt from gdb:
>
>
> (gdb) symbol-file /usr/bin/postgres
> Reading symbols from /usr/bin/postgres...done.
>
> (gdb) attach 13220
> Attaching to Pid 13220
> 0x2ac26b22 in ?? ()
>
> (gdb) cont
> Continuing.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x8082f0f in rt_box_union ()
> (gdb) bt
> #0 0x8082f0f in rt_box_union ()
> #1 0x815fe3f in DirectFunctionCall2 ()
> #2 0x2ae553af in ?? ()
> #3 0x81604b5 in FunctionCall3 ()
> #4 0x8071b7c in gistpenalty ()
> #5 0x807112f in gistchoose ()
> #6 0x806e574 in gistlayerinsert ()
> #7 0x806e4c6 in gistdoinsert ()
> #8 0x806e3d6 in gistinsert ()
> #9 0x8160d7c in OidFunctionCall6 ()
> #10 0x807b4d1 in index_insert ()
> #11 0x80cfe5d in ExecInsertIndexTuples ()
> #12 0x80cc6fc in ExecUpdate ()
> #13 0x80cc2c3 in ExecutePlan ()
> #14 0x80cb82d in ExecutorRun ()
> #15 0x81175b2 in ProcessQuery ()
> #16 0x8115c67 in pg_exec_query_string ()
> #17 0x8116c09 in PostgresMain ()
> #18 0x80ff013 in DoBackend ()
> #19 0x80fe8b3 in BackendStartup ()
> #20 0x80fdb7d in ServerLoop ()
> #21 0x80fd750 in PostmasterMain ()
> #22 0x80dd93e in main ()
> #23 0x2ab8c9cb in ?? ()
> (gdb)
>
> Would you have any advice for me?
>
> Many thanks,
> -Robin Chauhan
>
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Regards,
Oleg
__________________________________________________ ___________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83

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