@Override
    public final void in(Metrics metrics) {
        try {
            remoteSender.send(remoteReceiverWorkerName, metrics, Selector.HashCode);
        } catch (Throwable e) {
            log.error(e.getMessage(), e);
        }
    }
MetricsRemoteWorker forwards the metrics to the target OAP node.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/worker/MetricsRemoteWorker.java