hadoop's start-dfs not creating datanode on the slave - hadoop

Question

I am trying to set a Hadoop cluster over two nodes. start-dfs.sh on my master node is opening a window and shortly after the window closes, and when i execute start-dfs it logs namenode is correctly launched, but datanode is not and logs the following :
Problem binding to [slave-VM1:9005] java.net.BindException: Cannot assign requested address: bind; For more details see: http://wiki.apache.org/hadoop/BindException
I have set
ssh-keygen -t rsa -P ''
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
(and also set adminstrators_authorized_keys file with the right public key) (also ssh user#remotemachine is working and gives access to the slave)
Here's my full Hadoop configuration set on both master and slave machines (Windows):
hdfs-site.xml :
<configuration>
<property>
<name>dfs.name.dir</name>
<value>/C:/Hadoop/hadoop-3.2.2/data/namenode</value>
</property>
<property>
<name>dfs.datanode.https.address</name>
<value>slaveVM1:50475</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/C:/Hadoop/hadoop-3.2.2/data/datanode</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
core-site.xml :
<configuration>
<property>
<name>dfs.datanode.http.address</name>
<value>slaveVM1:9005</value>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://masterVM2:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/C:/Hadoop/hadoop-3.2.2/hadoopTmp</value>
</property>
<property>
<name>fs.defaultFS</name>
<value>hdfs://masterVM2:8020</value>
</property>
</configuration>
mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>masterVM2:9001</value>
</property>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.application.classpath</name>
<value>%HADOOP_HOME%/share/hadoop/mapreduce/*,%HADOOP_HOME%/share/hadoop/mapreduce/lib/*,%HADOOP_HOME%/share/hadoop/common/*,%HADOOP_HOME%/share/hadoop/common/lib/*,%HADOOP_HOME%/share/hadoop/yarn/*,%HADOOP_HOME%/share/hadoop/yarn/lib/*,%HADOOP_HOME%/share/hadoop/hdfs/*,%HADOOP_HOME%/share/hadoop/hdfs/lib/*</value>
</property>
</configuration>
yarn-site.xml
<configuration>
<property>
<name>yarn.acl.enable</name>
<value>0</value>
</property>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>master</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
PS : i am adminstrator on both machines, and i set HADOOP_CONF_DIR C:\Hadoop\hadoop-3.2.2\etc\hadoop
I also set the slave IP in hadoop_conf_dir slaves file.
PS : if i remove the code :
<property>
<name>dfs.datanode.https.address</name>
<value>slave:50475</value>
</property>
from hdfs-site.xml
Then both datanote and namenode launch on the master node.
hosts :
*.*.*.* slaveVM1
*.*.*.* masterVM2
... are the IPs of the respective machines, all other entries are commented out

Answer 1

This usually happens
BindException: Cannot assign requested address: bind;
when the port in use. Meaning maybe it's the application was already started, or was started previously and didn't shut down properly or another applicaiton is using that port. Try rebooting, (as a heavy handed but reasonably effective way of clearing ports).