[postgis-users] Super weird problem: Cannot insert more than ~300 rows (or ~100 kb) into a table
Paul Ramsey
pramsey at opengeo.org
Tue Jul 10 13:46:23 PDT 2012
On Tue, Jul 10, 2012 at 12:24 PM, Sandro Santilli <strk at keybit.net> wrote:
> Better cut a 1.5.5 soon.
> Did the NEWS file contain a note about this already ?
No, it was a teeny change that had no ticket :) I know, I'm bad. Has one now.
P.
>
> --strk;
>
> On Tue, Jul 10, 2012 at 09:53:56AM -0700, Paul Ramsey wrote:
>> Indeed, there has been a small change since 1.5.4 that moves some
>> testing for unknowns *below* the null test (where they should be)
>> avoiding the null pointer reference that is causing the crash.
>>
>> Index: postgis/geography_gist.c
>> ===================================================================
>> --- postgis/geography_gist.c (revision 9721)
>> +++ postgis/geography_gist.c (revision 10037)
>> @@ -267,17 +267,15 @@
>> return 0.0;
>> }
>>
>> - if ( gidx_is_unknown(a) && gidx_is_unknown(b) )
>> - {
>> - return 0.0;
>> - }
>> -
>> if ( a == NULL || gidx_is_unknown(a) )
>> return gidx_volume(b);
>>
>> if ( b == NULL || gidx_is_unknown(b) )
>> return gidx_volume(a);
>>
>> + if ( gidx_is_unknown(a) && gidx_is_unknown(b) )
>> + return 0.0;
>> +
>> /* Ensure 'a' has the most dimensions. */
>> gidx_dimensionality_check(&a, &b);
>>
>>
>> On Tue, Jul 10, 2012 at 9:50 AM, Paul Ramsey <pramsey at opengeo.org> wrote:
>> > Since others get crashes on 1.5.4, I tested *exactly* that version and
>> > lo, it does in fact crash. The current 1.5 stable branch does not
>> > crash, so finding the different might not be hard... (also points to
>> > needing a 1.5.5)
>> > P.
>> >
>> > On Tue, Jul 10, 2012 at 1:00 AM, René Fournier <m5 at renefournier.com> wrote:
>> >> Ticket submitted:
>> >>
>> >> http://trac.osgeo.org/postgis/ticket/1903
>> >>
>> >> But the crash problem seems not to happen for everyone. At least, the attached SQL file will crash my PostgreSQL 1.5.4 on Mac OS X 10.7.4 every time. But not for Paul. Would some of you be able to test it on your setup, to see if we can spot a pattern or connection? Thanks.
>> >>
>> >> On 2012-07-04, at 11:46 PM, Paul Ramsey wrote:
>> >>
>> >>> This is all well and good, but we need to know which 300 rows to load.
>> >>> If you have a load file, just strip out the first 301 (or whatever)
>> >>> rows, confirm that the file makes things go "boom" and then create a
>> >>> ticket on the tracker with the dump file attached.
>> >>>
>> >>> http://trac.osgeo.org/
>> >>>
>> >>> Thanks!
>> >>>
>> >>> P.
>> >>>
>> >>> On Wed, Jul 4, 2012 at 2:01 AM, René Fournier <m5 at renefournier.com> wrote:
>> >>>> I've narrowed the point at which a crash will always happen: If I simply
>> >>>> create the table *without* the index...
>> >>>>
>> >>>> CREATE INDEX address_location ON addresses USING GIST (location);
>> >>>>
>> >>>> ...it won't crash. (Inserts thousands of rows without a problem.) With that
>> >>>> index in place, it will always crash after ~300 rows. And here's the log
>> >>>> when it does crash:
>> >>>>
>> >>>>
>> >>>> LOG: server process (PID 98414) was terminated by signal 11: Segmentation
>> >>>> fault
>> >>>> LOG: terminating any other active server processes
>> >>>> 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.
>> >>>> LOG: all server processes terminated; reinitializing
>> >>>> LOG: database system was interrupted; last known up at 2012-07-04 10:44:15
>> >>>> CEST
>> >>>> LOG: database system was not properly shut down; automatic recovery in
>> >>>> progress
>> >>>> LOG: redo starts at 0/78E4A50
>> >>>> LOG: record with zero length at 0/7B52580
>> >>>> LOG: redo done at 0/7B52540
>> >>>> LOG: last completed transaction was at log time 2012-07-04
>> >>>> 10:44:40.712517+02
>> >>>> LOG: database system is ready to accept connections
>> >>>>
>> >>>>
>> >>>> On 2012-07-03, at 6:31 PM, Mark Cave-Ayland wrote:
>> >>>>
>> >>>> On 03/07/12 13:20, René Fournier wrote:
>> >>>>
>> >>>> So, it seems that the table gets full and corrupted to some extent.
>> >>>>
>> >>>> After my import script inserts ~290 rows, and then postgres crashes...
>> >>>>
>> >>>>
>> >>>> mydb=# select count(*) from addresses;INSERT INTO addresses (
>> >>>>
>> >>>> account_id, territory_id, location ) VALUES ( 1, 75,
>> >>>>
>> >>>> ST_GeomFromText('POINT(-114.267388 51.089941)') );
>> >>>>
>> >>>> count
>> >>>>
>> >>>> -------
>> >>>>
>> >>>> 284
>> >>>>
>> >>>> (1 row)
>> >>>>
>> >>>>
>> >>>> The connection to the server was lost. Attempting reset: Failed.
>> >>>>
>> >>>>
>> >>>> So, can't insert any more rows...
>> >>>>
>> >>>>
>> >>>>
>> >>>> !> delete from addresses where id > 50;
>> >>>>
>> >>>> You are currently not connected to a database.
>> >>>>
>> >>>>
>> >>>>
>> >>>> Postgres client/connection is crashed.
>> >>>>
>> >>>>
>> >>>> !> \q
>> >>>>
>> >>>> Tue Jul 03 14:15:28 -- rene /opt/local/var/db:: psql -U postgres
>> >>>>
>> >>>> mydb psql (9.1.4)
>> >>>>
>> >>>> Type "help" for help.
>> >>>>
>> >>>>
>> >>>> mydb=# delete from addresses where id > 50;
>> >>>>
>> >>>> DELETE 234
>> >>>>
>> >>>>
>> >>>> Deleting rows works...
>> >>>>
>> >>>>
>> >>>>
>> >>>> mydb=# select count(*) from addresses;INSERT INTO addresses (
>> >>>>
>> >>>> account_id, territory_id, location ) VALUES ( 1, 75,
>> >>>>
>> >>>> ST_GeomFromText('POINT(-114.267388 51.089941)') );
>> >>>>
>> >>>> count
>> >>>>
>> >>>> -------
>> >>>>
>> >>>> 50
>> >>>>
>> >>>> (1 row)
>> >>>>
>> >>>>
>> >>>> The connection to the server was lost. Attempting reset: Failed.
>> >>>>
>> >>>>
>> >>>>
>> >>>> SELECT and DELETE work, but I can't insert any new rows, until...
>> >>>>
>> >>>>
>> >>>>
>> >>>> !> \q
>> >>>>
>> >>>> Tue Jul 03 14:15:39 -- rene /opt/local/var/db:: psql -U postgres
>> >>>>
>> >>>> mydb psql (9.1.4)
>> >>>>
>> >>>> Type "help" for help.
>> >>>>
>> >>>>
>> >>>> mydb=# vacuum;vacuum full;vacuum full analyze;
>> >>>>
>> >>>> VACUUM
>> >>>>
>> >>>> VACUUM
>> >>>>
>> >>>> NOTICE: no notnull values, invalid stats
>> >>>>
>> >>>> VACUUM
>> >>>>
>> >>>> mydb=# select count(*) from addresses;INSERT INTO addresses (
>> >>>>
>> >>>> account_id, territory_id, location ) VALUES ( 1, 75,
>> >>>>
>> >>>> ST_GeomFromText('POINT(-114.267388 51.089941)') );
>> >>>>
>> >>>> count
>> >>>>
>> >>>> -------
>> >>>>
>> >>>> 50
>> >>>>
>> >>>> (1 row)
>> >>>>
>> >>>>
>> >>>> INSERT 0 1
>> >>>>
>> >>>> mydb=#
>> >>>>
>> >>>>
>> >>>> So, it appears there's some weird corruption going on... Still, not sure
>> >>>>
>> >>>> what to try next. My PostGIS is via Macports, not sure how to enable the
>> >>>>
>> >>>> debug mode...
>> >>>>
>> >>>>
>> >>>> Hi René,
>> >>>>
>> >>>> I think that you need to create a new bug on the PostGIS bug tracker and
>> >>>> upload a file that causes the crash on your system, i.e. it can be run using
>> >>>> "psql -d postgis_db -f crash.sql" so that we can try and reproduce what you
>> >>>> are seeing.
>> >>>>
>> >>>> Also as a matter of interest, do you see anything interesting in the
>> >>>> PostgreSQL log file at the time of the crash?
>> >>>>
>> >>>>
>> >>>> ATB,
>> >>>>
>> >>>> Mark.
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