it looks like https://github.com/GoogleCloudPlatform/google-cloud-java/commit/e3a99c2f9314f938bafd9fd5d19a98a43335bd98 changed BigQueryRpc.getQueryResults to return null on 404 without adjusting BigQueryImpl to handle that.
it looks like e3a99c2 changed BigQueryRpc.getQueryResults to return null on 404 without adjusting BigQueryImpl to handle that.