Apache Hadoop HDFS errors

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

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

Nothing to list here.
Package nameClass namePatterns foundSolution coverageSummary coverage
org.apache.hadoop.hdfsDistributedFileSystem68
org.apache.hadoop.hdfsDFSOutputStream$DataStreamer59
org.apache.hadoop.hdfsDFSClient47
org.apache.hadoop.hdfsDFSInputStream14
org.apache.hadoop.hdfsDFSOutputStream12
org.apache.hadoop.hdfsNameNodeProxies7
org.apache.hadoop.hdfsDFSOutputStream$DataStreamer$ResponseProcessor5
org.apache.hadoop.hdfsBlockReaderFactory4
org.apache.hadoop.hdfsRemoteBlockReader23
org.apache.hadoop.hdfsHdfsConfiguration2
org.apache.hadoop.hdfsDistributedFileSystem$172
org.apache.hadoop.hdfsDistributedFileSystem$222
org.apache.hadoop.hdfsHftpFileSystem2
org.apache.hadoop.hdfsDistributedFileSystem$161
org.apache.hadoop.hdfsBlockReader1
org.apache.hadoop.hdfsDistributedFileSystem$251
org.apache.hadoop.hdfsDistributedFileSystem$191
org.apache.hadoop.hdfsDistributedFileSystem$31
Package nameClass nameMethod namePatterns foundSolution coverage
org.apache.hadoop.hdfsDistributedFileSystemgetFileStatus27
org.apache.hadoop.hdfsDistributedFileSystemlistStatus8
org.apache.hadoop.hdfsDistributedFileSysteminitialize7
org.apache.hadoop.hdfsDistributedFileSystemopen6
org.apache.hadoop.hdfsDistributedFileSystemdelete5
org.apache.hadoop.hdfsDistributedFileSystemgetPathName3
org.apache.hadoop.hdfsDistributedFileSystemaccess$0002
org.apache.hadoop.hdfsDistributedFileSystemmkdirs2
org.apache.hadoop.hdfsDistributedFileSystemlistStatusInternal1
org.apache.hadoop.hdfsDistributedFileSystemcheckPath1
org.apache.hadoop.hdfsDistributedFileSystemcreateSymlink1
org.apache.hadoop.hdfsDistributedFileSystemgetFileChecksum1
org.apache.hadoop.hdfsDistributedFileSystemaccess$6001
org.apache.hadoop.hdfsDistributedFileSystemrename1
org.apache.hadoop.hdfsDistributedFileSystem<clinit>1
org.apache.hadoop.hdfsDistributedFileSystemcreate1
Package nameClass nameMethod nameException TypePatterns foundSolution coverage
org.apache.hadoop.hdfsDistributedFileSystemopenFileNotFoundException3
org.apache.hadoop.hdfsDistributedFileSystemopenIOException3