org.apache.hadoop.util
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## Package `org.apache.hadoop.util`

Added Classes and Interfaces
`AsyncDiskService` |
`ChecksumUtil` |
`MRAsyncDiskService` | This class is a container of multiple thread pools each for a volume so that we can schedule async disk operations easily.
`PluginDispatcher` | Provides convenience functions for dispatching calls through to plugins registered with a class.
`ProcessTree` | Process tree related operations
`ProcessTree.Signal` | The constants for the signals.
`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
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.
HostsFileReader |
ProcfsBasedProcessTree | A Proc file-system based ProcessTree.
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
VersionInfo | This class finds the package info for Hadoop and the HadoopVersionAnnotation information.

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