Apache Hadoop HDFS errors

https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html

The Hadoop Distributed File System (HDFS) is a distributed file system designed to run on commodity hardware

Documented:

Nothing to list here.
Package nameClass namePatterns foundSolution coverageDescription coverage
org.apache.hadoop.hdfs.server.datanodeDataNode32
org.apache.hadoop.hdfs.server.datanodeDataXceiver10
org.apache.hadoop.hdfs.server.datanodeBlockSender8
org.apache.hadoop.hdfs.server.datanodeDataStorage4
org.apache.hadoop.hdfs.server.datanodeBPServiceActor3
org.apache.hadoop.hdfs.server.datanodeBlockReceiver2
org.apache.hadoop.hdfs.server.datanodeDirectoryScanner2
org.apache.hadoop.hdfs.server.datanodeBlockPoolSliceStorage1
org.apache.hadoop.hdfs.server.datanodeBPOfferService1
Nothing to list here.
Nothing to list here.