presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/storage/organization/ShardOrganizationManager.java/ShardOrganizationManager/start
class ShardOrganizationManager:    @PostConstruct
    public void start()
    {
        if (!enabled || started.getAndSet(true)) {
            return;
        }

        startDiscovery();
    }