Please check that both nodes have the same rsync version. It might be that wsrep_sst_rsync script returns return value 12 of rsync process, which means 'Error in rsync protocol data stream'. As far as I remember this could be caused by incompatible rsync versions.
Please check that both nodes have the same rsync version. It might be that wsrep_sst_rsync script returns return value 12 of rsync process, which means 'Error in rsync protocol data stream'. As far as I remember this could be caused by incompatible rsync versions.