YARN-8214. Change default RegistryDNS port.

            Contributed by Billie Rinaldi

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/client/api/RegistryConstants.java

@@ -95,7 +95,7 @@ public interface RegistryConstants {
   /**
    * Default DNS port number.
    */
-  int DEFAULT_DNS_PORT = 5353;
+  int DEFAULT_DNS_PORT = 5335;
 
   /**
    * DNSSEC Enabled?

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/yarn-service/RegistryDNS.md

@@ -58,7 +58,7 @@ primary DNS server can be configured to forward a zone to the registry DNS
 server.
 2. The DNS Server exposes a port that can receive both TCP and UDP requests per
 DNS standards. The default port for DNS protocols is not in the restricted
-range (5353). However, existing DNS assets may only allow zone forwarding to
+range (5335). However, existing DNS assets may only allow zone forwarding to
 non-custom ports. To support this, the registry DNS server can be started in
 privileged mode.
 
@@ -136,7 +136,7 @@ standard DNS requests from users or other DNS servers (for example, DNS servers
 RegistryDNS service configured as a forwarder).
 
 ## Start the DNS Server
-By default, the DNS server runs on non-privileged port `5353`. Start the server
+By default, the DNS server runs on non-privileged port `5335`. Start the server
 with:
 ```
 yarn --daemon start registrydns
@@ -157,7 +157,7 @@ The Registry DNS server reads its configuration properties from the yarn-site.xm
 | hadoop.registry.dns.enabled | The DNS functionality is enabled for the cluster. Default is false. |
 | hadoop.registry.dns.domain-name  | The domain name for Hadoop cluster associated records.  |
 | hadoop.registry.dns.bind-address | Address associated with the network interface to which the DNS listener should bind.  |
-| hadoop.registry.dns.bind-port | The port number for the DNS listener. The default port is 5353.  |
+| hadoop.registry.dns.bind-port | The port number for the DNS listener. The default port is 5335.  |
 | hadoop.registry.dns.dnssec.enabled | Indicates whether the DNSSEC support is enabled. Default is false.  |
 | hadoop.registry.dns.public-key  | The base64 representation of the server’s public key. Leveraged for creating the DNSKEY Record provided for DNSSEC client requests.  |
 | hadoop.registry.dns.private-key-file  | The path to the standard DNSSEC private key file. Must only be readable by the DNS launching identity. See [dnssec-keygen](https://ftp.isc.org/isc/bind/cur/9.9/doc/arm/man.dnssec-keygen.html) documentation.  |
@@ -174,10 +174,10 @@ The Registry DNS server reads its configuration properties from the yarn-site.xm
   </property>
 
   <property>
-    <description>The port number for the DNS listener. The default port is 5353.
+    <description>The port number for the DNS listener. The default port is 5335.
     If the standard privileged port 53 is used, make sure start the DNS with jsvc support.</description>
     <name>hadoop.registry.dns.bind-port</name>
-    <value>5353</value>
+    <value>5335</value>
   </property>
 
   <property>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/yarn-service/ServiceDiscovery.md

@@ -94,10 +94,10 @@ section of [Registry DNS](RegistryDNS.html).
   </property>
 
   <property>
-    <description>The port number for the DNS listener. The default port is 5353.
+    <description>The port number for the DNS listener. The default port is 5335.
     If the standard privileged port 53 is used, make sure start the DNS with jsvc support.</description>
     <name>hadoop.registry.dns.bind-port</name>
-    <value>5353</value>
+    <value>5335</value>
   </property>
 
   <property>
@@ -135,7 +135,7 @@ To configure Registry DNS to serve reverse lookup for `172.17.0.0/24`
   </property>
 ```
 ## Start Registry DNS Server
-By default, the DNS server runs on non-privileged port `5353`. Start the server
+By default, the DNS server runs on non-privileged port `5335`. Start the server
 with:
 ```
 yarn --daemon start registrydns