[ZODB-Dev] DisconnectedError

[José Pedro Ferreira]

Hello.
I am experiencing a problem with ZODB-3.6.0 / Python 2.5, under Linux.
Each time I initialize a database, i get a DisconnectedError exception 
in the client, with the following traceback:

<quote>

  File "/home/pferreir/workspace/indico/code/code/MaKaC/common/db.py", 
line 50, in __init__
    self._db=MaKaCDB(self._storage)

  File "/usr/local/lib/python2.5/site-packages/ZODB/DB.py", line 238, in 
__init__
    storage.load(z64,'')

  File "/usr/local/lib/python2.5/site-packages/ZEO/ClientStorage.py", 
line 746, in load
    return self.loadEx(oid, version)[:2]

  File "/usr/local/lib/python2.5/site-packages/ZEO/ClientStorage.py", 
line 769, in loadEx
    data, tid, ver = self._server.loadEx(oid, version)

  File "/usr/local/lib/python2.5/site-packages/ZEO/ServerStub.py", line 
192, in loadEx
    return self.rpc.call("loadEx", oid, version)

  File "/usr/local/lib/python2.5/site-packages/ZEO/zrpc/connection.py", 
line 531, in call
    r_flags, r_args = self.wait(msgid)

  File "/usr/local/lib/python2.5/site-packages/ZEO/zrpc/connection.py", 
line 621, in wait
    raise DisconnectedError()

DisconnectedError

</quote>

In the server side, I get:

<quote>

2007-05-04T16:20:36 (11926) new connection ('127.0.0.1', 38126): 
<ManagedServerConnection ('127.0.0.1', 38126)>
2007-05-04T16:20:36 (127.0.0.1:38126) received handshake 'Z303'
2007-05-04T16:20:36 (127.0.0.1:38126) loadEx() raised exception: 0x00
Traceback (most recent call last):
  File "/usr/local/lib/python2.5/site-packages/ZEO/zrpc/connection.py", 
line 421, in handle_request
    ret = meth(*args)
  File "/usr/local/lib/python2.5/site-packages/ZEO/StorageServer.py", 
line 248, in loadEx
    return self.storage.loadEx(oid, version)
  File 
"/usr/local/lib/python2.5/site-packages/ZODB/FileStorage/FileStorage.py", 
line 523, in loadEx
    pos = self._lookup_pos(oid)
  File 
"/usr/local/lib/python2.5/site-packages/ZODB/FileStorage/FileStorage.py", 
line 514, in _lookup_pos
    raise POSKeyError(oid)
POSKeyError: 0x00
2007-05-04T16:20:36 (11926/127.0.0.1:38126) disconnected
2007-05-04T16:20:36 (11926) new connection ('127.0.0.1', 38127): 
<ManagedServerConnection ('127.0.0.1', 38127)>
2007-05-04T16:20:36 (127.0.0.1:38127) received handshake 'Z303'

</quote>

What confuses me is that I though that a root object for the database 
would be created by the client, and a DisconnectedError is raised before 
that happens. What can be happening?

Thanks in advance,

Pedro