Error “Failed to retrieve data from /webhdfs/v1/?op=LISTSTATUS: Server Error” when using hadoop

Question

I opened up localhost:9870 and try to upload a txt file to the hdfs.

I see the error message below

Failed to retrieve data from /webhdfs/v1/?op=LISTS         


        

Answer 1

I had the same issue with JDK 9. The fix for me was to add this line in hadoop-env.sh

export HADOOP_OPTS="--add-modules java.activation"

Thats because java.activation package is deprecated in Java 9.