Preconditions.checkArgument(refNameToInstance != null, "No serviceInstances mapped to " + serviceName + " , "
+ serviceNameToRefNameToInstance.keySet());
- ServiceInstance serviceInstance = ServiceInstance.fromString(refNameToInstance.get(refName));
+ String instanceId = refNameToInstance.get(refName);
+ Preconditions.checkArgument(instanceId != null, "No serviceInstances mapped to " + serviceName + ":"
+ + refName + ", " + serviceNameToRefNameToInstance.keySet());
+
+ ServiceInstance serviceInstance = ServiceInstance.fromString(instanceId);
Preconditions.checkArgument(serviceInstance != null, "No serviceInstance mapped to " + refName
+ " under service name " + serviceName + " , " + refNameToInstance.keySet());
return serviceInstance;