RpcManager rpcManager = TestingUtil.extractComponent(c1, RpcManager.class);
Collection<Address> addresses = cm1.getMembers();
CommandsFactory cf = TestingUtil.extractCommandsFactory(c1);
PutKeyValueCommand cmd = cf.buildPutKeyValueCommand("k", "v2", -1, -1, null);
Map<Address,Response> responseMap = rpcManager.invokeRemotely(addresses, cmd, rpcManager.getDefaultRpcOptions(true, false));
assert responseMap.size() == 2;
TestingUtil.killCacheManagers(cm2);