Uses of Package
org.apache.hadoop.util

Packages that use org.apache.hadoop.util

Package	Description
org.apache.hadoop.crypto.key	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.fs	An abstract file system API.
org.apache.hadoop.fs.ftp
org.apache.hadoop.fs.impl	This package contains implementation classes for use inside filesystems.
org.apache.hadoop.fs.local	Filesystem implementations that allow Hadoop to read directly from the local file system.
org.apache.hadoop.fs.sftp	SFTP FileSystem package.
org.apache.hadoop.fs.statistics	This package contains support for statistic collection and reporting.
org.apache.hadoop.fs.statistics.impl	Implementation support for statistics.
org.apache.hadoop.fs.viewfs	ViewFileSystem and ViewFileSystemOverloadScheme classes.
org.apache.hadoop.ha
org.apache.hadoop.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.ipc	Tools to help define network clients and servers.
org.apache.hadoop.metrics2.source
org.apache.hadoop.security	Classes for hadoop security.
org.apache.hadoop.security.alias	Provides the hadoop credential provider API.
org.apache.hadoop.security.authorize	Support for service-level authorization.
org.apache.hadoop.security.token	Support for delegation tokens.
org.apache.hadoop.service	Support for services.
org.apache.hadoop.service.launcher	This package contains classes, interfaces and exceptions to launch YARN services from the command line.
org.apache.hadoop.tools
org.apache.hadoop.util	Common utilities.
org.apache.hadoop.util.curator	This package provides utilities to interact with Curator ZooKeeper.

Classes in org.apache.hadoop.util used by org.apache.hadoop.crypto.key

Class	Description
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs

Class	Description
DataChecksum	This class provides interface and utilities for processing checksums for DFS data transfers.
DataChecksum.Type	The checksum types
DiskValidator	A interface for disk validators.
Progressable	A facility for reporting progress.
Shell	A base class for running a Shell command.
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.ftp

Class	Description
DataChecksum.Type	The checksum types
Progressable	A facility for reporting progress.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.impl

Class	Description
WeakReferenceMap	A map of keys type K to objects of type V which uses weak references, so does lot leak memory through long-lived references at the expense of losing references when GC takes place..

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.local

Class	Description
DataChecksum.Type	The checksum types

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.sftp

Class	Description
Progressable	A facility for reporting progress.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.statistics

Class	Description
JsonSerialization	Support for marshalling objects to and from JSON.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.statistics.impl

Class	Description
OperationDuration	Little duration counter.

Classes in org.apache.hadoop.util used by org.apache.hadoop.fs.viewfs

Class	Description
Progressable	A facility for reporting progress.

Classes in org.apache.hadoop.util used by org.apache.hadoop.ha

Class	Description
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.io

Class	Description
Progress	Utility to assist with generation of progress reports.
Progressable	A facility for reporting progress.

Classes in org.apache.hadoop.util used by org.apache.hadoop.ipc

Class	Description
LightWeightCache.Entry	Entries of LightWeightCache.
LightWeightGSet	A low memory footprint GSet implementation, which uses an array for storing the elements and linked lists for collision resolution.
LightWeightGSet.LinkedElement	Elements of LightWeightGSet.

Classes in org.apache.hadoop.util used by org.apache.hadoop.metrics2.source

Class	Description
GcTimeMonitor	This class monitors the percentage of time the JVM is paused in GC within the specified observation window, say 1 minute.
JvmPauseMonitor	Class which sets up a simple thread which runs in a loop sleeping for a short interval of time.

Classes in org.apache.hadoop.util used by org.apache.hadoop.security

Class	Description
ExitCodeProvider	Get the exit code of an exception.
ExitUtil.ExitException	An exception raised when a call to ExitUtil.terminate(int) was called and system exits were blocked.
Shell.ShellCommandExecutor	A simple shell command executor.
Timer	Utility methods for getting the time and computing intervals.
Tool	A tool interface that supports handling of generic command-line options.
ZKUtil.ZKAuthInfo	An authentication token passed to ZooKeeper.addAuthInfo

Classes in org.apache.hadoop.util used by org.apache.hadoop.security.alias

Class	Description
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.security.authorize

Class	Description
MachineList	Container class which holds a list of ip/host addresses and answers membership queries.

Classes in org.apache.hadoop.util used by org.apache.hadoop.security.token

Class	Description
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.service

Class	Description
ExitCodeProvider	Get the exit code of an exception.

Classes in org.apache.hadoop.util used by org.apache.hadoop.service.launcher

Class	Description
ExitCodeProvider	Get the exit code of an exception.
ExitUtil.ExitException	An exception raised when a call to ExitUtil.terminate(int) was called and system exits were blocked.
GenericOptionsParser	GenericOptionsParser is a utility to parse command line arguments generic to the Hadoop framework.
SignalUtil.Handler
SignalUtil.Signal

Classes in org.apache.hadoop.util used by org.apache.hadoop.tools

Class	Description
Tool	A tool interface that supports handling of generic command-line options.

Classes in org.apache.hadoop.util used by org.apache.hadoop.util

Class	Description
AutoCloseableLock	This is a wrap class of a ReentrantLock.
BlockingThreadPoolExecutorService	This ExecutorService blocks the submission of new tasks when its queue is already full by using a semaphore.
CleanerUtil.BufferCleaner	Pass in an implementation of this interface to cleanup ByteBuffers.
ComparableVersion	Generic implementation of version comparison.
CrcComposer	Encapsulates logic for composing multiple CRCs into one or more combined CRCs corresponding to concatenated underlying data ranges.
Daemon	A thread that has called Thread.setDaemon(boolean) with true.
DataChecksum	This class provides interface and utilities for processing checksums for DFS data transfers.
DataChecksum.Type	The checksum types
DiskChecker.DiskErrorException
DiskValidator	A interface for disk validators.
ExitCodeProvider	Get the exit code of an exception.
ExitUtil.ExitException	An exception raised when a call to ExitUtil.terminate(int) was called and system exits were blocked.
ExitUtil.HaltException	An exception raised when a call to ExitUtil.terminate(int) was called and system halts were blocked.
FileBasedIPList	FileBasedIPList loads a list of subnets in CIDR format and ip addresses from a file.
GcTimeMonitor	This class monitors the percentage of time the JVM is paused in GC within the specified observation window, say 1 minute.
GcTimeMonitor.Builder
GcTimeMonitor.GcData	Encapsulates data about GC pauses measured at the specific timestamp.
GcTimeMonitor.GcTimeAlertHandler	The user can provide an instance of a class implementing this interface when initializing a GcTimeMonitor to receive alerts when GC time percentage exceeds the specified threshold.
GSet	A GSet is set, which supports the GSet.get(Object) operation.
HostsFileReader.HostDetails	An atomic view of the included and excluded hosts
IdentityHashStore.Visitor
IdGenerator	Generic ID generator used for generating various types of number sequences.
IndexedSortable	Interface for collections capable of being sorted by IndexedSorter algorithms.
IndexedSorter	Interface for sort algorithms accepting IndexedSortable items.
InstrumentedLock	This is a debugging class that can be used by callers to track whether a specific lock is being held for too long and periodically log a warning and stack trace, if so.
IntrusiveCollection	Implements an intrusive doubly-linked list.
IntrusiveCollection.Element	An element contained in this list.
InvalidChecksumSizeException	Thrown when bytesPerChecksun field in the meta file is less than or equal to 0 or type is invalid.
IPList
LightWeightGSet	A low memory footprint GSet implementation, which uses an array for storing the elements and linked lists for collision resolution.
LightWeightGSet.LinkedElement	Elements of LightWeightGSet.
MachineList.InetAddressFactory	InetAddressFactory is used to obtain InetAddress from host.
OperationDuration	Little duration counter.
Progress	Utility to assist with generation of progress reports.
Progressable	A facility for reporting progress.
RateLimiting	Minimal subset of google rate limiter class.
ReadWriteDiskValidatorMetrics	The metrics for a directory generated by ReadWriteDiskValidator.
SemaphoredDelegatingExecutor	This ExecutorService blocks the submission of new tasks when its queue is already full by using a semaphore.
Shell	A base class for running a Shell command.
Shell.CommandExecutor
Shell.OSType
ShutdownHookManager	The ShutdownHookManager enables running shutdownHook in a deterministic order, higher priority first.
SignalLogger	This class logs a message whenever we're about to exit on a UNIX signal.
SignalUtil.Handler
SignalUtil.Signal
StopWatch	A simplified StopWatch implementation which can measure times in nanoseconds.
StringUtils.TraditionalBinaryPrefix	The traditional binary prefixes, kilo, mega, ..., exa, which can be represented by a 64-bit integer.
SysInfo	Plugin to calculate resource information on the system.
Timer	Utility methods for getting the time and computing intervals.
Tool	A tool interface that supports handling of generic command-line options.
ZKUtil.BadAclFormatException
ZKUtil.BadAuthFormatException
ZKUtil.ZKAuthInfo	An authentication token passed to ZooKeeper.addAuthInfo

Classes in org.apache.hadoop.util used by org.apache.hadoop.util.curator

Class	Description
ZKUtil.ZKAuthInfo	An authentication token passed to ZooKeeper.addAuthInfo