ZODB 3.9.5 - Invalidations out of order

[Andreas Jung]

Zope 2.12.11 + ZODB 3.9.5:

I am receiving the following error pretty often right now while importing documents ("Document" instances only)
through a ZEO client (bin/instance run migrationscript.py:...).

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "migration/migrate.py", line 260, in <module>
    url = import_plone(app, import_dir, options.verbose, options.migration_profile)
  File "migration/migrate.py", line 233, in import_plone
    transaction.commit()
  File "/home/ajung/.buildout/eggs/transaction-1.0.0-py2.6.egg/transaction/_manager.py", line 93, in commit
    return self.get().commit()
  File "/home/ajung/.buildout/eggs/transaction-1.0.0-py2.6.egg/transaction/_transaction.py", line 322, in commit
    self._commitResources()
  File "/home/ajung/.buildout/eggs/transaction-1.0.0-py2.6.egg/transaction/_transaction.py", line 416, in _commitResources
    rm.commit(self)
  File "/home/ajung/.buildout/eggs/ZODB3-3.9.5-py2.6-linux-x86_64.egg/ZODB/Connection.py", line 553, in commit
    self._commit_savepoint(transaction)
  File "/home/ajung/.buildout/eggs/ZODB3-3.9.5-py2.6-linux-x86_64.egg/ZODB/Connection.py", line 1178, in _commit_savepoint
    self.invalidate(s, {oid:True})
  File "/home/ajung/.buildout/eggs/ZODB3-3.9.5-py2.6-linux-x86_64.egg/ZODB/Connection.py", line 346, in invalidate
    % (tid, self._txn_time))
AssertionError: invalidations out of order, None < '\x03\x89\xc3\x8a\xad\xb8\r\xaa'

[Andreas Jung (ajung)]

Related to

https://bugs.launchpad.net/zodb/+bug/509801

?

[Andreas Jung (ajung)]

I can reliably trigger this error by removing an existing older Plone site through a second ZEO client while running my import through the other ZEO client.

[Jim Fulton (jim-zope)]

Were there blobs involved?

Did you try with 3.9.7?

[Andreas Jung (ajung)]

Switched to ZODB 3.9.7 and will keep an eye on it.