Comment 0 for bug 420738

Loggerhead produced the following error:
INF [20090828-20:16:31.044] [1158543696] loggerhead: Starting to process http://bazaar.launchpad.net/%7Eubuntu-mythtv/mythtv/mythtv-trunk-022/annotate/head%3A/debian/libmyth-0.22-0.files
INF [20090828-20:16:31.164] [1158543696] lp-loggerhead: Using branch: ~ubuntu-mythtv/mythtv/mythtv-trunk-022
INF [20090828-20:16:31.164] [1158543696] lp-loggerhead: branch_url: http://bazaar.launchpad.net/00/00/38/da
ERR [20090828-20:16:31.179] [1158543696] root: Traceback (most recent call last):
ERR [20090828-20:16:31.180] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/httpserver.py", line 1062, in process_request_in_thread
ERR [20090828-20:16:31.180] [1158543696] root: self.finish_request(request, client_address)
ERR [20090828-20:16:31.180] [1158543696] root: File "/usr/lib/python2.4/SocketServer.py", line 254, in finish_request
ERR [20090828-20:16:31.180] [1158543696] root: self.RequestHandlerClass(request, client_address, self)
ERR [20090828-20:16:31.180] [1158543696] root: File "/usr/lib/python2.4/SocketServer.py", line 521, in __init__
ERR [20090828-20:16:31.180] [1158543696] root: self.handle()
ERR [20090828-20:16:31.180] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/httpserver.py", line 436, in handle
ERR [20090828-20:16:31.181] [1158543696] root: BaseHTTPRequestHandler.handle(self)
ERR [20090828-20:16:31.181] [1158543696] root: File "/usr/lib/python2.4/BaseHTTPServer.py", line 316, in handle
ERR [20090828-20:16:31.181] [1158543696] root: self.handle_one_request()
ERR [20090828-20:16:31.181] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/httpserver.py", line 431, in handle_one_request
ERR [20090828-20:16:31.181] [1158543696] root: self.wsgi_execute()
ERR [20090828-20:16:31.181] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/httpserver.py", line 287, in wsgi_execute
ERR [20090828-20:16:31.181] [1158543696] root: self.wsgi_start_response)
ERR [20090828-20:16:31.181] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/sourcecode/launchpad-loggerhead/launchpad_loggerhead/debug.py", line 106, in wrapped_application
ERR [20090828-20:16:31.181] [1158543696] root: result = application(environ, response_hook)
ERR [20090828-20:16:31.181] [1158543696] root: File "sourcecode/launchpad-loggerhead/start-loggerhead.py", line 150, in wrapped
ERR [20090828-20:16:31.181] [1158543696] root: return app(environ, start_response)
ERR [20090828-20:16:31.181] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/sourcecode/launchpad-loggerhead/launchpad_loggerhead/debug.py", line 45, in wrapped
ERR [20090828-20:16:31.182] [1158543696] root: return app(environ, start_response)
ERR [20090828-20:16:31.182] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/translogger.py", line 68, in __call__
ERR [20090828-20:16:31.182] [1158543696] root: return self.application(environ, replacement_start_response)
ERR [20090828-20:16:31.182] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/config.py", line 285, in __call__
ERR [20090828-20:16:31.182] [1158543696] root: return self.app(environ, start_response)
ERR [20090828-20:16:31.182] [1158543696] root: File "sourcecode/launchpad-loggerhead/start-loggerhead.py", line 134, in wrapped
ERR [20090828-20:16:31.182] [1158543696] root: return app(environ, start_response)
ERR [20090828-20:16:31.182] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/sourcecode/launchpad-loggerhead/launchpad_loggerhead/session.py", line 53, in __call__
ERR [20090828-20:16:31.182] [1158543696] root: return self.cookie_handler(environ, start_response)
ERR [20090828-20:16:31.182] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/auth/cookie.py", line 305, in __call__
ERR [20090828-20:16:31.182] [1158543696] root: return self.application(environ, response_hook)
ERR [20090828-20:16:31.182] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/sourcecode/launchpad-loggerhead/launchpad_loggerhead/session.py", line 73, in _process
ERR [20090828-20:16:31.183] [1158543696] root: return self.application(environ, response_hook)
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/Paste-1.7.2-py2.4.egg/paste/httpexceptions.py", line 636, in __call__
ERR [20090828-20:16:31.183] [1158543696] root: return self.application(environ, start_response)
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/sourcecode/launchpad-loggerhead/launchpad_loggerhead/app.py", line 230, in __call__
ERR [20090828-20:16:31.183] [1158543696] root: return view.app(environ, start_response)
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/apps/branch.py", line 165, in app
ERR [20090828-20:16:31.183] [1158543696] root: return c(environ, start_response)
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/controllers/__init__.py", line 93, in __call__
ERR [20090828-20:16:31.183] [1158543696] root: vals.update(self.get_values(path, kwargs, headers))
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/controllers/annotate_ui.py", line 101, in get_values
ERR [20090828-20:16:31.183] [1158543696] root: history = self._history
ERR [20090828-20:16:31.183] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/controllers/__init__.py", line 65, in _history
ERR [20090828-20:16:31.184] [1158543696] root: self.__history = self._history_callable()
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/apps/branch.py", line 81, in get_history
ERR [20090828-20:16:31.184] [1158543696] root: revinfo_disk_cache=revinfo_disk_cache, cache_key=self.friendly_name)
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/history.py", line 271, in __init__
ERR [20090828-20:16:31.184] [1158543696] root: self._load_whole_history_data(caches, cache_key)
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/history.py", line 232, in _load_whole_history_data
ERR [20090828-20:16:31.184] [1158543696] root: update_missed_caches()
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/history.py", line 227, in update_missed_caches
ERR [20090828-20:16:31.184] [1158543696] root: cache.set(cache_key, self.last_revid, self._rev_info)
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/lib/loggerhead/history.py", line 187, in set
ERR [20090828-20:16:31.184] [1158543696] root: self._cache[key] = (revid, data)
ERR [20090828-20:16:31.184] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/bzr-1.17-py2.4-linux-x86_64.egg/bzrlib/lru_cache.py", line 217, in __setitem__
ERR [20090828-20:16:31.185] [1158543696] root: self.add(key, value, cleanup=None)
ERR [20090828-20:16:31.185] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/bzr-1.17-py2.4-linux-x86_64.egg/bzrlib/lru_cache.py", line 177, in add
ERR [20090828-20:16:31.185] [1158543696] root: self.cleanup()
ERR [20090828-20:16:31.185] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/bzr-1.17-py2.4-linux-x86_64.egg/bzrlib/lru_cache.py", line 213, in cleanup
ERR [20090828-20:16:31.185] [1158543696] root: self._remove_lru()
ERR [20090828-20:16:31.185] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/bzr-1.17-py2.4-linux-x86_64.egg/bzrlib/lru_cache.py", line 272, in _remove_lru
ERR [20090828-20:16:31.185] [1158543696] root: self._remove_node(self._least_recently_used)
ERR [20090828-20:16:31.185] [1158543696] root: File "/srv/codebrowse.launchpad.net/production/launchpad-rev-8312/eggs/bzr-1.17-py2.4-linux-x86_64.egg/bzrlib/lru_cache.py", line 260, in _remove_node
ERR [20090828-20:16:31.185] [1158543696] root: node_next = self._cache[node.next_key]
ERR [20090828-20:16:31.185] [1158543696] root: KeyError: '~jtv/launchpad/bug-416434'

This might be an instance of #396838, but it occurs with bzr 1.17, and the bug was fixed in that release.