HDFS-14673. The console log is noisy when using DNSDomainNameResolver to resolve NameNode.

Author: pingsutw

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.java

@@ -234,7 +234,7 @@ Collection<InetSocketAddress> getResolvedHostsIfNecessary(
           conf, nameNodeUri, HdfsClientConfigKeys.Failover.RESOLVE_SERVICE_KEY);
     // If the address needs to be resolved, get all of the IP addresses
     // from this address and pass them into the proxy
-    LOG.info("Namenode domain name will be resolved with {}",
+    LOG.debug("Namenode domain name will be resolved with {}",
         dnr.getClass().getName());
     for (InetSocketAddress address : addressesOfNns) {
       String[] resolvedHostNames = dnr.getAllResolvedHostnameByDomainName(