Question: Configure environment not working with images: 2.0.0-hadoop3.2.1-java8

[nguacon90]

I've set env variable in hadoop.env but not override value in /etc/hadoop/hdfs-site.xml
HDFS_CONF_dfs_datanode_use_datanode_hostname=false

I find that in /etc/hadoop/hdfs-site.xml properties append to the top of file many times when I restart container:

<!-- Put site-specific property overrides in this file. -->

<configuration>

<property><name>dfs.namenode.datanode.registration.ip-hostname-check</name><value>false</value></property>
<property><name>dfs.webhdfs.enabled</name><value>true</value></property>
<property><name>dfs.namenode.servicerpc-bind-host</name><value>192.168.20.108</value></property>
<property><name>dfs.replication</name><value>1</value></property>
<property><name>dfs.namenode.rpc-bind-host</name><value>192.168.20.108</value></property>
<property><name>dfs.permissions.enabled</name><value>false</value></property>
<property><name>dfs.namenode.name.dir</name><value>file:///hadoop/dfs/name</value></property>
<property><name>dfs.datanode.use.datanode.hostname</name><value>false</value></property>
<property><name>dfs.namenode.rpc-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.servicerpc-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.http-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.https-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.datanode.registration.ip-hostname-check</name><value>false</value></property>
<property><name>dfs.webhdfs.enabled</name><value>true</value></property>
<property><name>dfs.namenode.servicerpc-bind-host</name><value>192.168.20.108</value></property>
<property><name>dfs.replication</name><value>1</value></property>
<property><name>dfs.namenode.rpc-bind-host</name><value>192.168.20.108</value></property>
<property><name>dfs.permissions.enabled</name><value>false</value></property>
<property><name>dfs.namenode.name.dir</name><value>file:///hadoop/dfs/name</value></property>
<property><name>dfs.datanode.use.datanode.hostname</name><value>false</value></property>
<property><name>dfs.namenode.rpc-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.servicerpc-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.http-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.namenode.https-bind-host</name><value>0.0.0.0</value></property>
<property><name>dfs.client.use.datanode.hostname</name><value>true</value></property>
<property><name>dfs.datanode.use.datanode.hostname</name><value>true</value></property>
</configuration>

Anyone can help to resolve the issue?
Many thanks!