Re: How to troubleshoot: ERROR: cache lookup failed for type?

On 10/4/24 05:09, Marcin Barczyński wrote:
> Hello!
>
> When reindexing a table, PostgreSQL returns the following errors for
> two of its indexes:
>
> Index foo_idx1 on foo failed with error: failed to find parent tuple
> for heap-only tuple at (1162372,1) in table "foo"
> Index foo_idx2 on foo failed with error: failed to find parent tuple
> for heap-only tuple at (1162372,1) in table "foo"
>
> When trying to show the tuple, there is another error message:
>
> SET enable_indexscan = OFF;
> SET enable_tidscan = OFF;
> SELECT ctid, xmin, xmax, * FROM sf.dir_current_part_8 WHERE ctid =
> '(1162372,1)';
>
> ERROR: cache lookup failed for type 1769235301
>
> Searching for oid=1769235301 in pg_class, pg_type, pg_namespace and
> pg_proc returned no results.
>
> It appears to be data corruption.
> It's PostgreSQL 13 and unfortunately, data_checksums are turned off.

What is the complete version number e.g. 13.x?

What prompted the reindex of the table?

Have there been any recent hardware/software issues on the machine?

Does the Postgres log have any relevant information?

Can you pg_dump -t sf.dir_current_part_8?

What is the schema definition for sf.dir_current_part_8?

>
> I would appreciate any suggestions for troubleshooting this issue.
>
> --
> Marcin Barczyński
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com