Your message dated Fri, 17 Aug 2018 17:06:03 +0000 with message-id <[email protected]> and subject line Bug#906007: fixed in xapian-core 1.4.3-2+deb9u2 has caused the Debian Bug report #906007, regarding libxapian30: Cursor handling bug in glass backend to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 906007: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906007 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: libxapian30 Version: 1.4.3-2+deb9u1 Severity: important Tags: patch upstream Control: fixed -1 1.4.7-1 The glass backend (the default disk-based backend in Xapian 1.4.x) has a bug with long-lived cursors on a table in a WritableDatabase which can get into an invalid state, typically leading to a DatabaseCorruptError being thrown with the message: Db block overwritten - are there multiple writers? But in fact the on-disk database is not corrupted - it's just that the cursor in memory has got into an inconsistent state. It looks like we'll always detect the inconsistency before it can cause on-disk corruption but it's hard to be completely certain. The bug is in code to rebuild the cursor when the underlying table changes in ways which require that, which is a fairly rare occurrence to start with, and only triggers when a block in the cursor has been released, reallocated, and we tried to load it in the cursor at the same level - the cursor wrongly assumes it has the current version of the block. The usage patterns of notmuch can trigger this bug (at least two different notmuch users have hit it, and both reported 1.4.7 fixed their problems). It's also been encountered by at least one other person in their own code (they provided a cut-down reproducer that helped pin it down). This bug was fixed in upstream 1.4.7 which was released and packaged for Debian 3.5 weeks ago - no issues have been reported with the fix. https://git.xapian.org/?p=xapian;a=commitdiff;h=70266397a517e213977f49c5b7c2c91389c88879 I'm intending to propose fixing this in stretch. Cheers, Olly
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--- Begin Message ---Source: xapian-core Source-Version: 1.4.3-2+deb9u2 We believe that the bug you reported is fixed in the latest version of xapian-core, which is due to be installed in the Debian FTP archive. A summary of the changes between this version and the previous one is attached. Thank you for reporting the bug, which will now be closed. If you have further comments please address them to [email protected], and the maintainer will reopen the bug report if appropriate. Debian distribution maintenance software pp. Olly Betts <[email protected]> (supplier of updated xapian-core package) (This message was generated automatically at their request; if you believe that there is a problem with it please contact the archive administrators by mailing [email protected]) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Format: 1.8 Date: Mon, 13 Aug 2018 18:19:13 +1200 Source: xapian-core Binary: libxapian30 libxapian30-dbg libxapian-dev xapian-tools xapian-doc xapian-examples Architecture: source amd64 all Version: 1.4.3-2+deb9u2 Distribution: stretch Urgency: medium Maintainer: Olly Betts <[email protected]> Changed-By: Olly Betts <[email protected]> Description: libxapian-dev - Development files for Xapian search engine library libxapian30 - Search engine library libxapian30-dbg - Debugging symbols for the Xapian Search engine library xapian-doc - Core Xapian documentation xapian-examples - Xapian simple example programs xapian-tools - Basic tools for Xapian search engine library Closes: 906007 Changes: xapian-core (1.4.3-2+deb9u2) stretch; urgency=medium . * fix-glass-cursor-bug.patch: Fix glass backend bug with long-lived cursors on a table in a WritableDatabase which could incorrectly lead to DatabaseCorruptError being thrown when the database was actually OK. 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