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From: Olly Betts <olly@survex.com>
To: Felipe Contreras <felipe.contreras@gmail.com>
Cc: Xapian Discussion <xapian-discuss@lists.xapian.org>,
	"notmuch@notmuchmail.org" <notmuch@notmuchmail.org>
Subject: Re: How to recover from this permanent fatal error?
Date: Sun, 6 Jun 2021 11:08:51 +0100	[thread overview]
Message-ID: <20210606100851.GA18586@survex.com> (raw)
In-Reply-To: <CAMP44s0rGUsvD3LhFB199Y52WNATda7MfmKha_OHAPrfDWiPtw@mail.gmail.com>

On Sat, Jun 05, 2021 at 11:40:58PM -0500, Felipe Contreras wrote:
> % xapian-core/bin/xapian-check ~/mail/.notmuch/xapian/termlist.glass
> termlist:
> xapian-core/bin/.libs/lt-xapian-check: DatabaseCorruptError: Db block
> overwritten - are there multiple writers?

Ah - this tool currently requires the termlist table to be undamaged
enough to at least scan through.

You could try commenting out the body of GlassTable::set_overwritten()
in xapian-core/backends/glass/glass_table.cc so it keeps going instead
of throwing this exception, which might allow it to usefully recover
some or all tags.  If you (or anyone) try that and it works let me know
and I can patch the branch to emit a warning message and continue there.

If the postlist table is readable it'd be possible to rescue the tag
data from there instead, but that's more complicated to do because
the tags would need collating for each message.

Cheers,
    Olly

  reply	other threads:[~2021-06-06 10:09 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-05  0:44 How to recover from this permanent fatal error? Felipe Contreras
2021-06-05  1:37 ` David Bremner
2021-06-05  1:40   ` Felipe Contreras
2021-06-05  2:43     ` Olly Betts
2021-06-05 14:39       ` Felipe Contreras
2021-06-06  1:45         ` Olly Betts
2021-06-06  4:40           ` Felipe Contreras
2021-06-06 10:08             ` Olly Betts [this message]
2021-06-06 12:48               ` Felipe Contreras
2021-06-07  3:45                 ` Olly Betts
2021-06-07  7:07                   ` Felipe Contreras

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