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Package org.apache.hadoop.util

Added Classes and Interfaces
AsyncDiskService  
ChecksumUtil  
LinuxMemoryCalculatorPlugin Plugin to calculate virtual and physical memories on Linux systems.
MRAsyncDiskService This class is a container of multiple thread pools each for a volume so that we can schedule async disk operations easily.
MemoryCalculatorPlugin Plugin to calculate virtual and physical memories on the system.
PluginDispatcher Provides convenience functions for dispatching calls through to plugins registered with a class.
ProcessTree Process tree related operations
PureJavaCrc32 A pure-java implementation of the CRC32 checksum that uses the same polynomial as the built-in native CRC32.
ServicePlugin Service plug-in interface.
SingleArgumentRunnable Simple interface for a Runnable that takes a single argument.
 

Changed Classes
CyclicIteration Provide an cyclic Iterator for a NavigableMap The Iterator navigates the entries of the map according to the map's ordering.
DiskChecker Class that provides utility functions for checking disk problem
GenericOptionsParser GenericOptionsParser is a utility to parse command line arguments generic to the Hadoop framework.
GenericsUtil Contains utility methods for dealing with Java Generics.
HostsFileReader  
MergeSort An implementation of the core algorithm of MergeSort.
PriorityQueue A PriorityQueue maintains a partial ordering of its elements such that the least element can always be found in constant time.
ProcfsBasedProcessTree A Proc file-system based ProcessTree.
ReflectionUtils General reflection utils
RunJar Run a Hadoop job jar.
Shell A base class for running a Unix command.
Shell.ShellCommandExecutor A simple shell command executor.
StringUtils General string utils
StringUtils.TraditionalBinaryPrefix The traditional binary prefixes kilo mega ...
VersionInfo This class finds the package info for Hadoop and the HadoopVersionAnnotation information.