BUG #17586: Look like there are an another bug in REINDEX INDEX CONCURRENTLY of pg_toast indexes

The following bug has been logged on the website:

Bug reference:      17586
Logged by:          Maxim Boguk
Email address:      maxim.boguk@gmail.com
PostgreSQL version: 14.4
Operating system:   Ubuntu Linux
Description:

Details about the data structure
pg_toast.pg_toast_2502234687_index is index toast of exports_new_2022_32w
partition of exports_new table (Partition key: RANGE (epoch))

During the reindex job there were quite a lot new inserts into
exports_new_2022_32w table via partition head.


2022-08-11 02:46:16.972 UTC 1175180 ***_push@***_exports from [local]
[vxid:12/63545267 txid:354388805] [INSERT] LOG:  duration: 2711.995 ms
 statement: INSERT INTO exports_new(field_board_id, field_id_mod_256, epoch,
field_ids)
                (SELECT field_board_id, (field_id % 256)::int
field_id_mod_256, epoch, ARRAY_AGG(field_id) AS field_ids FROM (SELECT
field_board_id, epoch, unnest(field_ids) AS field_id FROM temp_export_ids)
t
                GROUP BY 1,2,3)


2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.1.sharedfileset/2.0", size 8192
2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index
2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.1.sharedfileset/1.0", size 8192
2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index
2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.1.sharedfileset/0.0", size 8192
2022-08-11 02:47:28.927 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index
2022-08-11 02:47:28.965 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.0.sharedfileset/2.0", size 252370944
2022-08-11 02:47:28.965 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index
2022-08-11 02:47:29.003 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.0.sharedfileset/1.0", size 253599744
2022-08-11 02:47:29.003 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index
2022-08-11 02:47:29.041 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] LOG:  temporary file: path
"base/pgsql_tmp/pgsql_tmp1187482.0.sharedfileset/0.0", size 251535360
2022-08-11 02:47:29.041 UTC 1187482 postgres@***_exports from [local]
[vxid:14/66875173 txid:0] [REINDEX] STATEMENT:  REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index


2022-08-11 02:47:30.023 UTC 1175180 ***_push@***_exports from [local]
[vxid:12/63545272 txid:354389107] [INSERT] LOG:  duration: 1991.666 ms
 statement: INSERT INTO exports_new(field_board_id, field_id_mod_256, epoch,
field_ids)
                (SELECT field_board_id, (field_id % 256)::int
field_id_mod_256, epoch, ARRAY_AGG(field_id) AS field_ids FROM (SELECT
field_board_id, epoch, unnest(field_ids) AS field_id FROM temp_export_ids)
t
                GROUP BY 1,2,3)
2022-08-11 02:47:55.962 UTC 1175180 ***_push@***_exports from [local]
[vxid:12/63545274 txid:354389164] [INSERT] LOG:  duration: 4027.248 ms
 statement: INSERT INTO exports_new(field_board_id, field_id_mod_256, epoch,
field_ids)
                (SELECT field_board_id, (field_id % 256)::int
field_id_mod_256, epoch, ARRAY_AGG(field_id) AS field_ids FROM (SELECT
field_board_id, epoch, unnest(field_ids) AS field_id FROM temp_export_ids)
t
                GROUP BY 1,2,3)
2022-08-11 02:48:02.883 UTC 1175180 ***_push@***_exports from [local]
[vxid:12/63545275 txid:354389277] [INSERT] LOG:  duration: 1055.236 ms
 statement: INSERT INTO exports_new(field_board_id, field_id_mod_256, epoch,
field_ids)
                (SELECT field_board_id, (field_id % 256)::int
field_id_mod_256, epoch, ARRAY_AGG(field_id) AS field_ids FROM (SELECT
field_board_id, epoch, unnest(field_ids) AS field_id FROM temp_export_ids)
t
                GROUP BY 1,2,3)
2022-08-11 02:48:24.914 UTC 1175180 ***_push@***_exports from [local]
[vxid:12/63545278 txid:354389390] [INSERT] LOG:  duration: 2020.759 ms
 statement: INSERT INTO exports_new(field_board_id, field_id_mod_256, epoch,
field_ids)
                (SELECT field_board_id, (field_id % 256)::int
field_id_mod_256, epoch, ARRAY_AGG(field_id) AS field_ids FROM (SELECT
field_board_id, epoch, unnest(field_ids) AS field_id FROM temp_export_ids)
t
                GROUP BY 1,2,3)

2022-08-11 02:48:49.512 UTC 1184504 ***_field_sync@***_exports from [local]
[vxid:10/63478386 txid:0] [SELECT] ERROR:  missing chunk number 0 for toast
value 2546878653 in pg_toast_2502234687
2022-08-11 02:48:49.512 UTC 1184504 ***_field_sync@***_exports from [local]
[vxid:10/63478386 txid:0] [SELECT] STATEMENT:  SELECT field_ids FROM
exports_new WHERE field_board_id = $1 AND field_id_mod_256 = $2 AND epoch =
$3

2022-08-11 02:48:49.651 UTC 1187482 postgres@***_exports from [local]
[vxid:14/0 txid:0] [REINDEX] LOG:  duration: 187669.153 ms  statement:
REINDEX INDEX CONCURRENTLY pg_toast.pg_toast_2502234687_index

2022-08-11 02:48:50.048 UTC 1184504 ***_field_sync@***_exports from [local]
[vxid:10/63478398 txid:0] [SELECT] ERROR:  missing chunk number 0 for toast
value 2546878502 in pg_toast_2502234687
2022-08-11 02:48:50.048 UTC 1184504 ***_field_sync@***_exports from [local]
[vxid:10/63478398 txid:0] [SELECT] STATEMENT:  SELECT field_ids FROM
exports_new WHERE field_board_id = $1 AND field_id_mod_256 = $2 AND epoch =
$3

and so on...

A follow-up secondary manual REINDEX INDEX CONCURRENTLY
pg_toast.pg_toast_2502234687_index resolved the problem with damaged
toast.

Problems do not always happen (rarely) and I cannot build a quick reproducer
so far.

Kind Regards,
Maxim