Hadoop: resourcemanager doesn't run on localhost - hadoop

Question

So I can't manage to access http://localhost:8088/ on hadoop 3.1.1
Here is what I did:
bin/hdfs namenode -format
sbin/start-dfs.sh
bin/hdfs dfs -mkdir /user
bin/hdfs dfs -mkdir /user/username
The web interface for the NameNode works but it doesn't for the Resource Manager.
core-site.xml:
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
hdfs-site.xml:
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
mapred-site.xml:
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
<configuration>
<property>
<name>mapreduce.application.classpath</name>
<value>$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/*:$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/lib/*</value>
</property>
</configuration>
yarn-site.xml:
<configuration>
<property>
<name>yarn.resourcemanager.address</name>
<value>127.0.0.1:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>127.0.0.1:8030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>127.0.0.1:8031</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.env-whitelist</name>
<value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOME</value>
</property>
</configuration>
.bash_profile
export PATH="/usr/local/sbin:$PATH"
export SCALA_HOME=/usr/local/scala
export JAVA_HOME=/Library/Java/JavaVirtualMachines/openjdk-11.0.1.jdk/Contents/Home
export SPARK_HOME=/usr/local/spark
export HADOOP_HOME=/usr/local/Cellar/hadoop/3.1.1/libexec/
export HADOOP_CONF_DIR=/usr/local/Cellar/hadoop/3.1.1/libexec/etc/hadoop
export PATH=$PATH:/usr/local/hadoop/bin
export PATH=$PATH:/usr/local/spark/bin
export PATH=$PATH:/usr/local/scala/bin
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS=-Djava.library.path=$HADOOP_HOME/lib
export PATH=$HADOOP_HOME/bin:$PATH
export PATH=$HADOOP_HOME/sbin:$PATH
The problem is when I run: sbin/start-yarn.sh here is the result
Starting resourcemanagers on []
Starting nodemanagers
shouldn't it say: Starting resourcemanagers on [localhost] ?

Answer 1

By default value for hostname from documentation is 0.0.0.0 and not localhost, if you want to configure it explicitly below are the properties and here its default values provided, you can override same.
yarn.resourcemanager.hostname 0.0.0.0 The hostname of the RM.
yarn.resourcemanager.address ${yarn.resourcemanager.hostname}:8032 The
address of the applications manager interface in the RM.