private void logWarning(String message) {
        long currentTimeMillis = System.currentTimeMillis();
        if (currentTimeMillis - lastTimestampOfWarningOutput > 1000 * 60) {
            lastTimestampOfWarningOutput = currentTimeMillis;
            log.warn(message);
        }
    }
gRPCWatermarkInterceptor is a gRPC interceptor that checks if the watermark is exceeded before processing the request.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/watermark/WatermarkGRPCInterceptor.java