@Override
            public void onError(Throwable throwable) {
                processor.process();
                Status status = Status.fromThrowable(throwable);
                if (Status.CANCELLED.getCode() == status.getCode()) {
                    if (log.isDebugEnabled()) {
                        log.debug(throwable.getMessage(), throwable);
                    }
                    return;
                }
                log.error(throwable.getMessage(), throwable);
            }
Meter protocol receiver, collect and process the meters.
oap-server/server-receiver-plugin/skywalking-meter-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/meter/provider/handler/MeterServiceHandler.java