[ZODB-Dev] More exciting ZODB errors ;-)

[Chris Withers]

Hi All,

We recently upgraded to Zope 2.8.4 and have been seeing some different 
and special errors every so often (why does this always and only ever 
happen to me? ;-) Nothing noticeably bad appears to result from these, 
but, as always, I loose hair over them and would like ot know what's 
going on :-S

Any clues?

Chris

08:55 - Traceback (most recent call last):
"lib/python/transaction/_transaction.py",
line 422, in _commitResources
     rm.tpc_begin(self)
   File "lib/python/ZODB/Connection.py", line
446, in tpc_begin
     self._normal_storage.tpc_begin(transaction)
   File "lib/python/ZEO/ClientStorage.py",
line 914, in tpc_begin
     txn._extension, tid, status)
   File "lib/python/ZEO/ServerStub.py", line
232, in tpc_begin
     return self.rpc.call('tpc_begin', id, user, descr, ext, tid, status)
   File "lib/python/ZEO/zrpc/connection.py",
line 536, in call
     raise inst # error raised by server
StorageTransactionError: Multiple simultaneous tpc_begin requests from one
client.

10:05 - Couldn't load state for 0x013872b7:
Traceback (most recent call last):
   File "lib/python/ZODB/Connection.py", line
704, in setstate
     self._setstate(obj)
   File "lib/python/ZODB/Connection.py", line
757, in _setstate
     self._load_before_or_conflict(obj)
   File "lib/python/ZODB/Connection.py", line
765, in _load_before_or_conflict
     if not (self._mvcc and self._setstate_noncurrent(obj)):
   File "lib/python/ZODB/Connection.py", line
788, in _setstate_noncurrent
     assert end is not None
AssertionError

10:05 - Error viewing a method on an object:
   File "lib/python/Products/PluginIndexes/DateIndex/DateIndex.py", line 
135, in index_object
     oldConvertedDate = self._unindex.get( documentId, _marker )
   File "lib/python/ZODB/Connection.py", line
704, in setstate
     self._setstate(obj)
   File "lib/python/ZODB/Connection.py", line
757, in _setstate
     self._load_before_or_conflict(obj)
   File "lib/python/ZODB/Connection.py", line
765, in _load_before_or_conflict
     if not (self._mvcc and self._setstate_noncurrent(obj)):
   File "lib/python/ZODB/Connection.py", line
788, in _setstate_noncurrent
     assert end is not None
AssertionError