Hadoop 3.1.2 Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error

user3719458 :

I'm using hadoop 3.1.2 and jdk-12.0.1 operating on Pseudo-Distributed mode. So far from the command line every thing seems to be working normal I can upload files retrieve from hdfs and local. For some reason when I open the namenode which is actually accede via http://ip:9870 and navigate to utilities/Browse Directory, the browser opens and this is what is highlighted "Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error" I know this question have been asked before Error "Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error" when using hadoop but the answer did not satisfy that's why I have reopen the case.

hdfs-site.xml 
<configuration>
<property>
 <name>dfs.replication</name>
 <value>1</value>
</property>

<property>
  <name>dfs.name.dir</name>
    <value>file:///home/debian/hadoopdata/hdfs/namenode</value>
</property>

<property>
  <name>dfs.data.dir</name>
    <value>file:///home/debian/hadoopdata/hdfs/datanode</value>
</property>
</configuration>

my output of netstat -ntlpincase if something is missing

tcp        0      0 0.0.0.0:9864            0.0.0.0:*               LISTEN      6033/java
tcp        0      0 192.168.0.250:9000      0.0.0.0:*               LISTEN      5935/java
tcp        0      0 0.0.0.0:9866            0.0.0.0:*               LISTEN      6033/java
tcp        0      0 0.0.0.0:9867            0.0.0.0:*               LISTEN      6033/java
tcp        0      0 0.0.0.0:9868            0.0.0.0:*               LISTEN      6196/java
tcp        0      0 0.0.0.0:9870            0.0.0.0:*               LISTEN      5935/java
tcp        0      0 127.0.0.1:46613         0.0.0.0:*               LISTEN      6033/java
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN  

tk421 :

As you have found out Hadoop doesn't support Java 12 (as of 07/02/2019).

The wiki Hadoop Java Versions describes the currently supported Java versions.

To see when Java 11 LTS is supported you can track this JIRA.

• HADOOP-15338 Support Java 11 LTS in Hadoop