follow up for #3291 (#3378)

Author: beiwei30

dubbo-registry/dubbo-registry-redis/src/main/java/org/apache/dubbo/registry/redis/RedisRegistry.java

@@ -25,7 +25,6 @@
 import org.apache.dubbo.common.utils.NamedThreadFactory;
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.common.utils.UrlUtils;
-import org.apache.dubbo.common.utils.CollectionUtils;
 import org.apache.dubbo.common.utils.ArrayUtils;
 import org.apache.dubbo.registry.NotifyListener;
 import org.apache.dubbo.registry.support.FailbackRegistry;
@@ -408,7 +407,7 @@ private void doNotify(Jedis jedis, Collection<String> keys, URL url, Collection<
             }
             List<URL> urls = new ArrayList<>();
             Map<String, String> values = jedis.hgetAll(key);
-            if (!CollectionUtils.isEmptyMap(values)) {
+            if (CollectionUtils.isNotEmptyMap(values)) {
                 for (Map.Entry<String, String> entry : values.entrySet()) {
                     URL u = URL.valueOf(entry.getKey());
                     if (!u.getParameter(Constants.DYNAMIC_KEY, true)