Re: [HACKERS] PANIC in GIN code

[Jeff Janes]

On Mon, Jun 29, 2015 at 2:08 PM, Heikki Linnakangas <hlinn...@iki.fi> wrote:


>
> Now kill -9 postmaster, and restart. Voila, the page headers are all zeros:
>
> postgres=# select * from page_header(get_raw_page('i_foo', 0));
>     lsn    | checksum | flags | lower | upper | special | pagesize |
> version |
> prune_xid
>
> -----------+----------+-------+-------+-------+---------+----------+---------+-
> ----------
>  0/1891270 |        0 |     0 |     0 |     0 |       0 |        0 |     0
> |
>         0
> (1 row)
>
> postgres=# select * from gin_metapage_info(get_raw_page('i_foo',
> 0));ERROR:  input page is not a GIN metapage
> DETAIL:  Flags 0189, expected 0008
>
> I just pushed a fix for this, but unfortunately it didn't make it
> 9.5alpha1.


Thanks.  I think that that fixed it.  It survived for over an hour this
time.  Then it hit a different problem (apparent deadlock in the LWLock
code, but that is probably a topic for another thread, I'm working on
reproducing it.)

Cheers,

Jeff