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| <div class="block">Common utilities.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/CleanerUtil.BufferCleaner.html" title="interface in org.apache.hadoop.util">CleanerUtil.BufferCleaner</a></td> |
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| <div class="block">Pass in an implementation of this interface to cleanup ByteBuffers.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ExitCodeProvider.html" title="interface in org.apache.hadoop.util">ExitCodeProvider</a></td> |
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| <div class="block">Get the exit code of an exception.</div> |
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| <div class="block">The user can provide an instance of a class implementing this interface |
| when initializing a GcTimeMonitor to receive alerts when GC time |
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| <div class="block">A facility for reporting progress.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a></td> |
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| <div class="block">A tool interface that supports handling of generic command-line options.</div> |
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| <div class="block">A <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true" title="class or interface in java.net"><code>URLClassLoader</code></a> for application isolation.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/AutoCloseableLock.html" title="class in org.apache.hadoop.util">AutoCloseableLock</a></td> |
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| <div class="block">This is a wrap class of a ReentrantLock.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/BasicDiskValidator.html" title="class in org.apache.hadoop.util">BasicDiskValidator</a></td> |
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| <div class="block">BasicDiskValidator is a wrapper around <code>DiskChecker</code>.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/CacheableIPList.html" title="class in org.apache.hadoop.util">CacheableIPList</a></td> |
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| <div class="block">CacheableIPList loads a list of subnets from a file.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/CloseableReferenceCount.html" title="class in org.apache.hadoop.util">CloseableReferenceCount</a></td> |
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| <div class="block">A closeable object that maintains a reference count.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/CombinedIPList.html" title="class in org.apache.hadoop.util">CombinedIPList</a></td> |
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| <div class="block">Util class to stores ips/hosts/subnets.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ComparableVersion.html" title="class in org.apache.hadoop.util">ComparableVersion</a></td> |
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| <div class="block">Generic implementation of version comparison.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/DurationInfo.html" title="class in org.apache.hadoop.util">DurationInfo</a></td> |
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| <div class="block">A duration with logging of final state at info or debug |
| in the <code>close()</code> call.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/FastNumberFormat.html" title="class in org.apache.hadoop.util">FastNumberFormat</a></td> |
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| <div class="block">Fast thread-safe version of NumberFormat</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/FileBasedIPList.html" title="class in org.apache.hadoop.util">FileBasedIPList</a></td> |
| <td class="colLast"> |
| <div class="block">FileBasedIPList loads a list of subnets in CIDR format and ip addresses from |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/FindClass.html" title="class in org.apache.hadoop.util">FindClass</a></td> |
| <td class="colLast"> |
| <div class="block">This entry point exists for diagnosing classloader problems: |
| is a class or resource present -and if so, where?</div> |
| </td> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/GcTimeMonitor.html" title="class in org.apache.hadoop.util">GcTimeMonitor</a></td> |
| <td class="colLast"> |
| <div class="block">This class monitors the percentage of time the JVM is paused in GC within |
| the specified observation window, say 1 minute.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/GcTimeMonitor.Builder.html" title="class in org.apache.hadoop.util">GcTimeMonitor.Builder</a></td> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/GcTimeMonitor.GcData.html" title="class in org.apache.hadoop.util">GcTimeMonitor.GcData</a></td> |
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| <div class="block">Encapsulates data about GC pauses measured at the specific timestamp.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/HostsFileReader.HostDetails.html" title="class in org.apache.hadoop.util">HostsFileReader.HostDetails</a></td> |
| <td class="colLast"> |
| <div class="block">An atomic view of the included and excluded hosts</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/InstrumentedLock.SuppressedSnapshot.html" title="class in org.apache.hadoop.util">InstrumentedLock.SuppressedSnapshot</a></td> |
| <td class="colLast"> |
| <div class="block">Immutable class to capture a snapshot of suppressed log message stats.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/LimitInputStream.html" title="class in org.apache.hadoop.util">LimitInputStream</a></td> |
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| <div class="block">Copied from guava source code v15 (LimitedInputStream) |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/MachineList.html" title="class in org.apache.hadoop.util">MachineList</a></td> |
| <td class="colLast"> |
| <div class="block">Container class which holds a list of ip/host addresses and |
| answers membership queries.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/MachineList.InetAddressFactory.html" title="class in org.apache.hadoop.util">MachineList.InetAddressFactory</a></td> |
| <td class="colLast"> |
| <div class="block">InetAddressFactory is used to obtain InetAddress from host.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/OperationDuration.html" title="class in org.apache.hadoop.util">OperationDuration</a></td> |
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| <div class="block">Little duration counter.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Options.html" title="class in org.apache.hadoop.util">Options</a></td> |
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| <div class="block">This class allows generic access to variable length type-safe parameter |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Options.BooleanOption.html" title="class in org.apache.hadoop.util">Options.BooleanOption</a></td> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/PureJavaCrc32.html" title="class in org.apache.hadoop.util">PureJavaCrc32</a></td> |
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| <div class="block">A pure-java implementation of the CRC32 checksum that uses |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/PureJavaCrc32C.html" title="class in org.apache.hadoop.util">PureJavaCrc32C</a></td> |
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| <div class="block">A pure-java implementation of the CRC32 checksum that uses |
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| <div class="block">ReadWriteDiskValidator is the class to check a directory by to create a file, |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ReflectionUtils.html" title="class in org.apache.hadoop.util">ReflectionUtils</a></td> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Shell.html" title="class in org.apache.hadoop.util">Shell</a></td> |
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| <div class="block">A base class for running a Shell command.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Shell.ShellCommandExecutor.html" title="class in org.apache.hadoop.util">Shell.ShellCommandExecutor</a></td> |
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| <div class="block">A simple shell command executor.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ShutdownHookManager.html" title="class in org.apache.hadoop.util">ShutdownHookManager</a></td> |
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| <div class="block">The <code>ShutdownHookManager</code> enables running shutdownHook |
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| <div class="block">Helper class to shutdown <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang"><code>Thread</code></a>s and <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><code>ExecutorService</code></a>s.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/StopWatch.html" title="class in org.apache.hadoop.util">StopWatch</a></td> |
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| <div class="block">A simplified StopWatch implementation which can measure times in nanoseconds.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/StringInterner.html" title="class in org.apache.hadoop.util">StringInterner</a></td> |
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| <div class="block">Provides string interning utility methods.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/SysInfo.html" title="class in org.apache.hadoop.util">SysInfo</a></td> |
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| <div class="block">Plugin to calculate resource information on the system.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ThreadUtil.html" title="class in org.apache.hadoop.util">ThreadUtil</a></td> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/ToolRunner.html" title="class in org.apache.hadoop.util">ToolRunner</a></td> |
| <td class="colLast"> |
| <div class="block">A utility to help run <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util"><code>Tool</code></a>s.</div> |
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| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/VersionInfo.html" title="class in org.apache.hadoop.util">VersionInfo</a></td> |
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| <div class="block">This class returns build information about Hadoop components.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Waitable.html" title="class in org.apache.hadoop.util">Waitable</a><T></td> |
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| <div class="block">Represents an object that you can wait for.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/DataChecksum.Type.html" title="enum in org.apache.hadoop.util">DataChecksum.Type</a></td> |
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| <div class="block">The checksum types</div> |
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| <td class="colFirst"><a href="../../../../org/apache/hadoop/util/Shell.OSType.html" title="enum in org.apache.hadoop.util">Shell.OSType</a></td> |
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| <div class="block">The traditional binary prefixes, kilo, mega, ..., exa, |
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