XDCR fails in MDS scenario

I've been trying to use XDCR to replicate data from 4 nodes to a 1 node cluster. Both are on 4.0.0, the target is on 3321, the source is on 3359.

On the source I have 4 nodes in the following setup:

• 192.168.56.101: Data, Index, Query
• 192.168.56.102 Data
• 192.168.56.103 Index, Query
• 192.168.56.104 Index, Query

One bucket "ods" is configured which I want to replicate. As soon as I start the replication, I get those errors in the UI:

2015-07-31 10:13:12 192.168.56.104:Invalid configuration. No source nozzle can be constructed since the source kv nodes are not the master for any vbuckets.

2015-07-31 10:13:12 192.168.56.103:Invalid configuration. No source nozzle can be constructed since the source kv nodes are not the master for any vbuckets.

and they don't stop. Cluster is stable, no rebalance going on. Only 103 and 104 affected, which looks to me that XDCR is trying to include data nodes which actually don't have the service enabled.

I'll attach a cbcollectinfo and will then try to take them out and see if it works (basically only having data nodes)