h2o_hosts wants to use h2o.build_cloud() not the base h2o_bc.build_cloud() to make sure the legacy h2o.nodes[] is created multi-machine tests that use legacy h2o.nodes[0].store_view() patterns to cause h2o requests. (had wrong import in h2o_hosts.py). Just noticed this in testdir_hosts* job on mr-0xd4. Probably will have some ec2 hosts fails this evening because of this, but this should fix things. (will see 'list index out of range' with a prior h2o.nodes[0] style reference)