[Zope-DB] mayday: zope does not start with ERROR ZODB.Connection Couldn't load state for 0x01 error

[robert rottermann]

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sorry for crossposting.
after stoping and restarting zope  one of the zeo/zope instances does
not start anymore, and stop with an error.

what could be the reason. how can we fix it.
fstest.py does not report any error.

thanks very much
robert



2007-02-06 18:43:44 ERROR ZODB.Connection Couldn't load state for 0x01
Traceback (most recent call last):
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
735, in setstate
    self._setstate(obj)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
789, in _setstate
    self._reader.setGhostState(obj, p)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
604, in setGhostState
    state = self.getState(pickle)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
597, in getState
    return unpickler.load()
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
479, in _persistent_load
    return self.loaders[reference_type](self, *args)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
540, in load_multi_oid
    conn = self._conn.get_connection(database_name)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
308, in get_connection
    new_con = self._db.databases[database_name].open(
KeyError: 'root'
Traceback (most recent call last):
  File "/webserver/zope/Zope-2.9.3/lib/python/Zope2/Startup/run.py",
line 56, in ?
    run()
  File "/webserver/zope/Zope-2.9.3/lib/python/Zope2/Startup/run.py",
line 21, in run
    starter.prepare()
  File
"/webserver/zope/Zope-2.9.3/lib/python/Zope2/Startup/__init__.py", line
98, in prepare
    self.startZope()
  File
"/webserver/zope/Zope-2.9.3/lib/python/Zope2/Startup/__init__.py", line
257, in startZope
    Zope2.startup()
  File "/webserver/zope/Zope-2.9.3/lib/python/Zope2/__init__.py", line
47, in startup
    _startup()
  File "/webserver/zope/Zope-2.9.3/lib/python/Zope2/App/startup.py",
line 103, in startup
    OFS.Application.initialize(application)
  File "/webserver/zope/Zope-2.9.3/lib/python/OFS/Application.py", line
304, in initialize
    initializer.initialize()
  File "/webserver/zope/Zope-2.9.3/lib/python/OFS/Application.py", line
325, in initialize
    self.install_cp_and_products()
  File "/webserver/zope/Zope-2.9.3/lib/python/OFS/Application.py", line
345, in install_cp_and_products
    app._setObject('Control_Panel', cpl)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
735, in setstate
    self._setstate(obj)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
789, in _setstate
    self._reader.setGhostState(obj, p)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
604, in setGhostState
    state = self.getState(pickle)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
597, in getState
    return unpickler.load()
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
479, in _persistent_load
    return self.loaders[reference_type](self, *args)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/serialize.py", line
540, in load_multi_oid
    conn = self._conn.get_connection(database_name)
  File "/webserver/zope/Zope-2.9.3/lib/python/ZODB/Connection.py", line
308, in get_connection
    new_con = self._db.databases[database_name].open(
KeyError: 'root'
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