public long getSize(Path path) {
        return curator.getStat(path).map(stat -> (long)stat.getDataLength())
                .orElseThrow(() -> new IllegalArgumentException(
                        "Could not get size from '" + path + "' in zookeeper"));
    }
Retrieves a node relative to the node of the active application

@param path a path relative to the currently active application
@return a Reader that can be used to get the data
configserver/src/main/java/com/yahoo/vespa/config/server/zookeeper/ZKApplication.java