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.namenodeFSNamesystem91
org.apache.hadoop.hdfs.server.namenodeNameNode62
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServer20
org.apache.hadoop.hdfs.server.namenodeFSPermissionChecker20
org.apache.hadoop.hdfs.server.namenodeFSDirectory10
org.apache.hadoop.hdfs.server.namenodeFSImage10
org.apache.hadoop.hdfs.server.namenodeSecondaryNameNode9
org.apache.hadoop.hdfs.server.namenodeINodeFile6
org.apache.hadoop.hdfs.server.namenodeFSEditLog4
org.apache.hadoop.hdfs.server.namenodeTransferFsImage1
org.apache.hadoop.hdfs.server.namenodeEditLogOutputStream1
org.apache.hadoop.hdfs.server.namenodeRedundantEditLogInputStream1
org.apache.hadoop.hdfs.server.namenodeSecondaryNameNode$21
org.apache.hadoop.hdfs.server.namenodeNamenodeJspHelper1
org.apache.hadoop.hdfs.server.namenodeNNStorage1
org.apache.hadoop.hdfs.server.namenodeFSDirAttrOp1
org.apache.hadoop.hdfs.server.namenodenn_005fbrowsedfscontent_jsp1
org.apache.hadoop.hdfs.server.namenodeJournalSet$JournalAndStream1
org.apache.hadoop.hdfs.server.namenodeFileJournalManager1
Package nameClass nameMethod namePatterns foundSolution coverage
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlock8
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServergetBlockLocations5
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServermkdirs2
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServerrollEditLog1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServercheckNNStartup1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServerregisterDatanode1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServer<init>1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServercreate1
Package nameClass nameMethod nameException TypePatterns foundSolution coverage
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlockDFSClient3
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlockIOException2
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlockTaskSetManager1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlockRemoteException1
org.apache.hadoop.hdfs.server.namenodeNameNodeRpcServeraddBlockDataStreamer1