Open Stack

Mike,

Did you at some stage remove a node from your system and decommission it?  We've seen similar (but not identical) backtraces in the replicator when someone powers up an old node.

It's a good idea to wipe the rings off nodes that you are removing from the system (after rebalance has finished of course).

Donagh

From: Mike Preston [mailto:mike.preston at synety.com]
Sent: 23 September 2013 10:35
To: openstack at lists.openstack.org
Subject: [Openstack] Replication error

Hi,

We are seeing a replication error on swift. The error only is seen on a single node, the other nodes appear to be working fine.
Installed version is debian wheezy with swift 1.4.8-2+deb7u1
Sep 23 10:33:03 storage-node-01 object-replicator Starting object replication pass.
Sep 23 10:33:03 storage-node-01 object-replicator Exception in top-level replication loop: #012Traceback (most recent call last):#012  File "/usr/lib/python2.7/dist-packages/swift/obj/replicator.py", line 564, in replicate#012    jobs = self.collect_jobs()#012  File "/usr/lib/python2.7/dist-packages/swift/obj/replicator.py", line 536, in collect_jobs#012    self.object_ring.get_part_nodes(int(partition))#012  File "/usr/lib/python2.7/dist-packages/swift/common/ring/ring.py", line 103, in get_part_nodes#012    return [self.devs[r[part]] for r in self._replica2part2dev_id]#012IndexError: array index out of range
Sep 23 10:33:03 storage-node-01 object-replicator Nothing replicated for 0.728466033936 seconds.
Sep 23 10:33:03 storage-node-01 object-replicator Object replication complete. (0.01 minutes)
Can anyone shed any light on this or next steps in debugging it or fixing it?



Mike Preston
Infrastructure Team  |  SYNETY
www.synety.com<http://www.synety.com>

direct: 0116 424 4016
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