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Message-ID: <20100331122642.GA13983@openwall.com>
Date: Wed, 31 Mar 2010 16:26:42 +0400
From: Solar Designer <solar@...nwall.com>
To: owl-users@...ts.openwall.com
Subject: Re: RPM Issue
We have included a workaround for this Owl upgrade issue into our latest
build of RPM (4.2-owl22). When a pre-NPTL Owl system is upgraded, the
/var/lib/rpm/__db.00? files will get removed automatically, thereby
preventing the problem. This automatic removal only happens once, when
going from a pre-NPTL to a with-NPTL build of RPM (e.g., when upgrading
Owl 2.0-stable to Owl-current - or to our upcoming release).
Simon - thank you for testing Owl-current and for reporting the issue!
On Sun, Mar 28, 2010 at 01:01:41AM +0300, Solar Designer wrote:
> ... I researched the issue some further. It appears to be quite normal
> that the expected file format of /var/lib/rpm/__db.001 changes when RPM
> built against NPTL is installed on a system that was previously using
> RPM built against LinuxThreads. That file is memory-mapped and it
> contains mutexes. Unfortunately, RPM does not distinguish this file
> format change from it having accessed the file in an inconsistent state,
> so it treats this as a temporary error and keeps retrying with the
> confusing message that you saw.
>
> The workaround is to ensure that there's no rpm process running and to
> "rm /var/lib/rpm/__db.00?". There's no need to run "rpm --rebuilddb"
> after that, even though this is commonly suggested (cure for a different
> disease). Once the old __db.00? files are removed, RPM works again (it
> silently re-creates the files) and the issue does not re-occur.
>
> I still have no idea why the workaround didn't appear to work for Simon.
> It could have something to do with the order in which packages were
> being rebuilt/upgraded on Simon's system.
>
> This same error message may appear in many other cases. The above
> description pertains to the specific known issue with upgrading an Owl
> system to our latest packages (built on March 23).
>
> Alexander
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