update-apt-xapian-index crashed with DatabaseLockError in __init__(): Unable to get write lock on /var/cache/apt-xapian-index/index.1: already locked

[JOHN]

using ubuntu install on ubs stick and installed Universal USB Installer with 3GB persistence area.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: apt-xapian-index 0.41ubuntu6
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sat Sep 3 02:36:35 2011
ExecutablePath: /usr/sbin/update-apt-xapian-index
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/sbin/update-apt-xapian-index --batch-mode --force
ProcEnviron:

PythonArgs: ['/usr/sbin/update-apt-xapian-index', '--batch-mode', '--force']
SourcePackage: apt-xapian-index
Title: update-apt-xapian-index crashed with DatabaseLockError in __init__(): Unable to get write lock on /var/cache/apt-xapian-index/index.1: already locked
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #764701, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.