xapian-check sorted order error

[Matthew Somerville]

On Wed, 21 Oct 2020 at 23:48, Olly Betts <olly at survex.com> wrote:
> You may be able to fix it using "xapian-compact" as that walks all the
> leaf items items in each table and writes them to new tables in a new
> database - that will put the items back in the right order in the new
> database, so if that's the only problem then that should fix it.

Thanks for your reply. Sadly, xapian-compact gave the following output:
    postlist: Reduced by 29% 2026096K (6760968K -> 4734872K)
    record: Reduced by 2% 11968K (482040K -> 470072K)
    termlist: Reduced by 14% 1214720K (8408144K -> 7193424K)
    position ...terminate called after throwing an instance of
'std::length_error'
      what():  basic_string::_M_replace
    Aborted

Guess to be on the safe side we'll look at scheduling in a full
reindex, and add xapian-check to our backup script so it warns us if
something like this happens again in future.

ATB,
Matthew