Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 102, in <module>
    indexer.incrementalUpdate()
  File "/usr/lib/pymodules/python2.6/axi/indexer.py", line 642, in incrementalUpdate
    self.updateIndex(dbpath)
  File "/usr/lib/pymodules/python2.6/axi/indexer.py", line 601, in updateIndex
    db = xapian.WritableDatabase(pathname, xapian.DB_CREATE_OR_OPEN)
  File "/usr/lib/python2.6/dist-packages/xapian.py", line 3195, in __init__
    _xapian.WritableDatabase_swiginit(self,_xapian.new_WritableDatabase(*args))
DatabaseLockError: Unable to acquire database write lock on /var/cache/apt-xapian-index/index.1: already locked