Multiple gnocchi-metricd with Redis show "ObjectNotFound"

I have four separate gnocchi-metricd instances (branch master, pulled from git on Jan 21) with a single redis-server for coordination, the log files show many of the following errors:

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2016-01-25 13:09:11.839 22257 DEBUG gnocchi.storage [-] Processing new and to delete measures process_background_tasks /usr/local/lib/python2.7/dist-packages/gnocchi/storage/__init__.py:182
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage [-] Unexpected error during measures processing
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage Traceback (most recent call last):
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/__init__.py", line 184, in process_background_tasks
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage self.process_measures(index, sync)
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/_carbonara.py", line 170, in process_measures
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage self._delete_unprocessed_measures_for_metric_id(metric_id)
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/ceph.py", line 106, in _delete_unprocessed_measures_for_metric_id
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage ctx.remove_object(n)
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage File "/usr/lib/python2.7/dist-packages/rados.py", line 1561, in remove_object
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage raise make_ex(ret, "Failed to remove '%s'" % key)
2016-01-25 13:33:22.405 22257 ERROR gnocchi.storage ObjectNotFound: Failed to remove 'measure_0dccfff7-30ff-4f63-8e86-ae9ee5f17b68_0018f4fa-90c8-478c-b64a-1aa681829caa_20162912_21:29:54'

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2016-01-25 11:26:10.444 22257 DEBUG gnocchi.storage._carbonara [-] Processing measures for 0d6be6f7-f49b-4611-add5-19fd74f52d67 process_measures /usr/local/lib/python2.7/dist-packages/gnocchi/storage/_carbonara.py:184
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara [-] Error processing new measures
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara Traceback (most recent call last):
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/_carbonara.py", line 185, in process_measures
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara with self._process_measure_for_metric(metric) as measures:
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara return self.gen.next()
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/ceph.py", line 117, in _process_measure_for_metric
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara data = self._get_object_content(ctx, n)
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara File "/usr/local/lib/python2.7/dist-packages/gnocchi/storage/ceph.py", line 215, in _get_object_content
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara data = ioctx.read(name, offset=offset)
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara File "/usr/lib/python2.7/dist-packages/rados.py", line 1489, in read
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara raise make_ex(ret, "Ioctx.read(%s): failed to read %s" % (self.name, key))
2016-01-25 11:46:24.291 22257 ERROR gnocchi.storage._carbonara ObjectNotFound: Ioctx.read(gnocchi): failed to read measure_0d6be6f7-f49b-4611-add5-19fd74f52d67_003ddbac-44f2-4e7b-9bbe-97cad254ce2b_20160015_08:00:46

I'm using tooz installed from git (version stable/kilo, pulled on Jan 20).

Please advice. Thanks, regards.