// update config node to something that will be interrupted.
LOG.info("setting to invalid dfo host");
master.getSpecMan().setConfig(lnode, "flow", "asciisynth(0)",
"agentDFOSink(\"localhost\", 12345)");
master.getSpecMan().addLogicalNode(NetUtils.localhost(), lnode);
liveMan.heartbeatChecks();
LogicalNode n = node.getLogicalNodeManager().get(lnode);
Driver d = n.getDriver();
assertTrue("Attempting to start driver timed out",
d.waitForAtLeastState(DriverState.ACTIVE, 10000));