MAPREDUCE-7377. Remove unused imports in MapReduce project (#4299)

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapred/YarnChild.java

@@ -59,7 +59,7 @@ import org.apache.hadoop.yarn.api.ApplicationConstants;
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
-import org.apache.hadoop.yarn.util.ConverterUtils;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/launcher/ContainerLauncher.java

@@ -19,7 +19,6 @@
 package org.apache.hadoop.mapreduce.v2.app.launcher;
 
 
-import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.yarn.event.EventHandler;
 
 public interface ContainerLauncher 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/AttemptsPage.java

@@ -28,7 +28,6 @@ import java.util.Map;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
-import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptState;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
 import org.apache.hadoop.mapreduce.v2.app.job.Task;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestFail.java

@@ -46,9 +46,7 @@ import org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherEvent;
 import org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl;
 import org.apache.hadoop.mapreduce.v2.app.rm.preemption.AMPreemptionPolicy;
 import org.apache.hadoop.net.NetUtils;
-import org.apache.hadoop.yarn.api.ContainerManagementProtocol;
 import org.apache.hadoop.yarn.api.records.ContainerId;
-import org.apache.hadoop.yarn.api.records.Token;
 import org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy.ContainerManagementProtocolProxyData;
 import org.junit.Test;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestMRAppMaster.java

@@ -83,7 +83,7 @@ import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.event.EventHandler;
 import org.apache.hadoop.yarn.security.AMRMTokenIdentifier;
-import org.apache.hadoop.yarn.util.ConverterUtils;
+
 import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.BeforeClass;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapred/LocalDistributedCacheManager.java

@@ -51,7 +51,6 @@ import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.util.concurrent.HadoopExecutors;
 import org.apache.hadoop.yarn.api.records.LocalResource;
 import org.apache.hadoop.yarn.api.records.LocalResourceType;
-import org.apache.hadoop.yarn.util.ConverterUtils;
 import org.apache.hadoop.yarn.util.FSDownload;
 
 import org.apache.hadoop.thirdparty.com.google.common.collect.Maps;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/jobhistory/JHAdminConfig.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.mapreduce.v2.jobhistory;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
 import org.apache.hadoop.http.HttpConfig;
 
 /**

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/test/java/org/apache/hadoop/mapred/TestLocalModeWithNewApis.java

@@ -21,7 +21,6 @@ import static org.junit.Assert.*;
 
 import java.io.BufferedReader;
 import java.io.DataOutputStream;
-import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.Random;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/test/java/org/apache/hadoop/mapreduce/v2/util/TestMRApps.java

@@ -40,7 +40,6 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FilterFileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.mapred.InvalidJobConfException;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.JobID;
 import org.apache.hadoop.mapreduce.MRConfig;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/JobACLsManager.java

@@ -24,7 +24,6 @@ import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.JobACL;
 import org.apache.hadoop.mapreduce.MRConfig;
-import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.authorize.AccessControlList;
 import org.slf4j.Logger;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/JobClient.java

@@ -48,7 +48,6 @@ import org.apache.hadoop.mapreduce.util.ConfigUtil;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.SecretManager.InvalidToken;
 import org.apache.hadoop.security.token.Token;
-import org.apache.hadoop.security.token.TokenRenewer;
 import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/TaskUmbilicalProtocol.java

@@ -24,8 +24,6 @@ import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.ipc.VersionedProtocol;
 import org.apache.hadoop.mapred.JvmTask;
-import org.apache.hadoop.mapreduce.checkpoint.CheckpointID;
-import org.apache.hadoop.mapreduce.checkpoint.FSCheckpointID;
 import org.apache.hadoop.mapreduce.checkpoint.TaskCheckpointID;
 import org.apache.hadoop.mapreduce.security.token.JobTokenSelector;
 import org.apache.hadoop.security.token.TokenInfo;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Job.java

@@ -22,7 +22,6 @@ import java.io.IOException;
 import java.net.URI;
 import java.security.PrivilegedExceptionAction;
 import java.util.Collection;
-import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.Map;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Mapper.java

@@ -25,7 +25,6 @@ import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.RawComparator;
 import org.apache.hadoop.io.compress.CompressionCodec;
-import org.apache.hadoop.mapreduce.task.MapContextImpl;
 
 /** 
  * Maps input key/value pairs to a set of intermediate key/value pairs.  

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/jobhistory/AMStartedEvent.java

@@ -28,7 +28,6 @@ import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEvent;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineMetric;
-import org.apache.hadoop.yarn.util.ConverterUtils;
 
 /**
  * Event to record start of a task attempt

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/jobhistory/TaskAttemptStartedEvent.java

@@ -30,7 +30,6 @@ import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEvent;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineMetric;
-import org.apache.hadoop.yarn.util.ConverterUtils;
 
 /**
  * Event to record start of a task attempt

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/DBRecordReader.java

@@ -18,30 +18,19 @@
 
 package org.apache.hadoop.mapreduce.lib.db;
 
-import java.io.DataInput;
-import java.io.DataOutput;
 import java.io.IOException;
 import java.sql.Connection;
-import java.sql.DatabaseMetaData;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.ArrayList;
-import java.util.List;
 
 import org.apache.hadoop.io.LongWritable;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.mapreduce.InputFormat;
 import org.apache.hadoop.mapreduce.InputSplit;
-import org.apache.hadoop.mapreduce.Job;
-import org.apache.hadoop.mapreduce.JobContext;
 import org.apache.hadoop.mapreduce.RecordReader;
 import org.apache.hadoop.mapreduce.TaskAttemptContext;
 import org.apache.hadoop.util.ReflectionUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.conf.Configurable;
 import org.apache.hadoop.conf.Configuration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/DataDrivenDBInputFormat.java

@@ -21,9 +21,6 @@ package org.apache.hadoop.mapreduce.lib.db;
 import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
@@ -36,15 +33,11 @@ import org.slf4j.LoggerFactory;
 
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.mapreduce.InputFormat;
 import org.apache.hadoop.mapreduce.InputSplit;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.JobContext;
 import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.mapreduce.RecordReader;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.hadoop.util.ReflectionUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configurable;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/DataDrivenDBRecordReader.java

@@ -18,30 +18,11 @@
 
 package org.apache.hadoop.mapreduce.lib.db;
 
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.io.IOException;
 import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.hadoop.io.LongWritable;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.mapreduce.InputFormat;
-import org.apache.hadoop.mapreduce.InputSplit;
-import org.apache.hadoop.mapreduce.Job;
-import org.apache.hadoop.mapreduce.JobContext;
-import org.apache.hadoop.mapreduce.RecordReader;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.hadoop.util.ReflectionUtils;
+
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.conf.Configurable;
 import org.apache.hadoop.conf.Configuration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/DateSplitter.java

@@ -20,8 +20,6 @@ package org.apache.hadoop.mapreduce.lib.db;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Time;
-import java.sql.Timestamp;
 import java.sql.Types;
 import java.util.ArrayList;
 import java.util.Date;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/MySQLDBRecordReader.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.mapreduce.lib.db;
 
 import java.sql.Connection;
 import java.sql.ResultSet;
-import java.sql.PreparedStatement;
 import java.sql.SQLException;
 
 import org.apache.hadoop.classification.InterfaceAudience;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/MySQLDataDrivenDBRecordReader.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.mapreduce.lib.db;
 
 import java.sql.Connection;
 import java.sql.ResultSet;
-import java.sql.PreparedStatement;
 import java.sql.SQLException;
 
 import org.apache.hadoop.classification.InterfaceAudience;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/OracleDataDrivenDBInputFormat.java

@@ -18,29 +18,12 @@
 
 package org.apache.hadoop.mapreduce.lib.db;
 
-import java.io.DataInput;
-import java.io.DataOutput;
 import java.io.IOException;
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
 import java.sql.Types;
-import java.util.ArrayList;
-import java.util.List;
 
 import org.apache.hadoop.io.LongWritable;
-import org.apache.hadoop.io.Text;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.mapreduce.InputFormat;
-import org.apache.hadoop.mapreduce.InputSplit;
-import org.apache.hadoop.mapreduce.Job;
-import org.apache.hadoop.mapreduce.JobContext;
 import org.apache.hadoop.mapreduce.RecordReader;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.hadoop.util.ReflectionUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configurable;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/OracleDataDrivenDBRecordReader.java

@@ -19,8 +19,6 @@
 package org.apache.hadoop.mapreduce.lib.db;
 
 import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.PreparedStatement;
 import java.sql.SQLException;
 
 import org.apache.hadoop.classification.InterfaceAudience;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/db/TextSplitter.java

@@ -22,7 +22,6 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.math.BigDecimal;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 
 import org.slf4j.Logger;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/MultipleOutputs.java

@@ -20,9 +20,7 @@ package org.apache.hadoop.mapreduce.lib.output;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapreduce.*;
-import org.apache.hadoop.mapreduce.Reducer.Context;
 import org.apache.hadoop.mapreduce.lib.output.MultipleOutputs;
 import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
 import org.apache.hadoop.util.ReflectionUtils;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/partition/TotalOrderPartitioner.java

@@ -31,10 +31,8 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.BinaryComparable;
 import org.apache.hadoop.io.IOUtils;
-import org.apache.hadoop.io.NullWritable;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.RawComparator;
-import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.Partitioner;
 import org.apache.hadoop.util.ReflectionUtils;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/MergeManager.java

@@ -20,19 +20,8 @@ package org.apache.hadoop.mapreduce.task.reduce;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.LocalDirAllocator;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.compress.CompressionCodec;
-import org.apache.hadoop.mapred.Counters;
-import org.apache.hadoop.mapred.JobConf;
-import org.apache.hadoop.mapred.MapOutputFile;
 import org.apache.hadoop.mapred.RawKeyValueIterator;
-import org.apache.hadoop.mapred.Reducer;
-import org.apache.hadoop.mapred.Reporter;
-import org.apache.hadoop.mapred.Task.CombineOutputCollector;
 import org.apache.hadoop.mapreduce.TaskAttemptID;
-import org.apache.hadoop.util.Progress;
 
 import java.io.IOException;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/util/ProcessTree.java

@@ -19,7 +19,6 @@
 package org.apache.hadoop.mapreduce.util;
 
 import java.io.IOException;
-import java.util.Arrays;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/jobcontrol/TestJobControl.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.mapreduce.lib.jobcontrol;
 import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
-import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
 import org.junit.Test;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestEventFetcher.java

@@ -19,7 +19,6 @@ package org.apache.hadoop.mapreduce.task.reduce;
 
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyInt;
-import static org.mockito.Mockito.anyString;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/HistoryClientService.java

@@ -84,7 +84,6 @@ import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
 import org.apache.hadoop.yarn.client.ClientRMProxy;
 import org.apache.hadoop.yarn.factories.RecordFactory;
 import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
-import org.apache.hadoop.yarn.ipc.RPCUtil;
 import org.apache.hadoop.yarn.ipc.YarnRPC;
 import org.apache.hadoop.yarn.util.Records;
 import org.apache.hadoop.yarn.webapp.WebApp;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsNavBlock.java

@@ -21,7 +21,6 @@ package org.apache.hadoop.mapreduce.v2.hs.webapp;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.v2.app.webapp.App;
 import org.apache.hadoop.mapreduce.v2.util.MRApps;
-import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.webapp.WebPageUtils;
 import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet;
 import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.DIV;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/io/TestSequenceFileMergeProgress.java

@@ -19,16 +19,11 @@
 package org.apache.hadoop.io;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
 
 import org.apache.hadoop.fs.*;
 import org.apache.hadoop.io.*;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 import org.apache.hadoop.io.SequenceFile.Sorter.RawKeyValueIterator;
-import org.apache.hadoop.io.SequenceFile.Sorter.SegmentDescriptor;
-import org.apache.hadoop.io.compress.CompressionCodec;
 import org.apache.hadoop.io.compress.DefaultCodec;
 import org.apache.hadoop.mapred.*;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/EmptyInputFormat.java

@@ -19,8 +19,6 @@ package org.apache.hadoop.mapred;
 
 import java.io.IOException;
 
-import org.apache.hadoop.fs.FileSystem;
-
 /**
   * InputFormat which simulates the absence of input data
   * by returning zero split.

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestLazyOutput.java

@@ -32,8 +32,6 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.mapred.lib.LazyOutputFormat;
 import org.junit.Test;
 import static org.junit.Assert.assertTrue;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMiniMRClasspath.java

@@ -24,8 +24,6 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URI;
 
-import junit.framework.TestCase;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileUtil;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/ThreadedMapBenchmark.java

@@ -26,7 +26,6 @@ import org.apache.hadoop.conf.Configured;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.BytesWritable;
-import org.apache.hadoop.io.Text;
 import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.mapred.SortValidator.RecordStatsChecker.NonSplitableSequenceFileInputFormat;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/FailJob.java

@@ -23,10 +23,8 @@ import java.io.OutputStreamWriter;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configured;
-import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.NullWritable;
 import org.apache.hadoop.io.Text;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduceLazyOutput.java

@@ -32,7 +32,6 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.mapred.Utils;
 import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/input/TestMultipleInputs.java

@@ -39,7 +39,6 @@ import org.apache.hadoop.mapreduce.Reducer;
 import org.junit.Before;
 import org.junit.Test;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 /**
  * @see TestDelegatingInputFormat

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/join/TestJoinDatamerge.java

@@ -32,9 +32,8 @@ import org.apache.hadoop.mapreduce.*;
 import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
-import org.junit.After;
+
 import org.junit.AfterClass;
-import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/partition/TestTotalOrderPartitioner.java

@@ -36,7 +36,6 @@ import org.apache.hadoop.io.WritableUtils;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 import org.apache.hadoop.io.serializer.JavaSerialization;
 import org.apache.hadoop.io.serializer.JavaSerializationComparator;
-import org.apache.hadoop.io.serializer.Serialization;
 import org.apache.hadoop.io.serializer.WritableSerialization;
 import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.junit.Test;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/security/token/delegation/TestDelegationToken.java

@@ -21,7 +21,6 @@ import java.security.PrivilegedExceptionAction;
 import org.apache.hadoop.io.DataInputBuffer;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.JobClient;
-import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestNonExistentJob.java

@@ -31,7 +31,6 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.io.IOException;
 import java.net.InetAddress;
 
 import static org.junit.Assert.assertNull;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/testjar/ClassWordCount.java

@@ -18,22 +18,11 @@
 
 package testjar;
 
-import java.io.*;
-import java.util.*;
-
-import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.io.WritableComparable;
-import org.apache.hadoop.mapred.JobClient;
-import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.Mapper;
-import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reducer;
-import org.apache.hadoop.mapred.Reporter;
-import org.apache.hadoop.mapred.MapReduceBase;
 import org.apache.hadoop.mapred.WordCount;
 
 /**

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/java/org/apache/hadoop/mapred/nativetask/NativeMapOutputCollectorDelegator.java

@@ -32,7 +32,6 @@ import org.apache.hadoop.mapred.nativetask.serde.INativeSerializer;
 import org.apache.hadoop.mapred.nativetask.serde.NativeSerialization;
 import org.apache.hadoop.mapreduce.MRConfig;
 import org.apache.hadoop.mapreduce.MRJobConfig;
-import org.apache.hadoop.mapreduce.TaskCounter;
 import org.apache.hadoop.util.QuickSort;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/test/java/org/apache/hadoop/mapred/nativetask/buffer/TestBufferPushPull.java

@@ -37,7 +37,6 @@ import org.apache.hadoop.mapred.nativetask.handlers.BufferPusher;
 import org.apache.hadoop.mapred.nativetask.handlers.IDataLoader;
 import org.apache.hadoop.mapred.nativetask.testutil.TestInput;
 import org.apache.hadoop.mapred.nativetask.testutil.TestInput.KV;
-import org.apache.hadoop.mapred.nativetask.util.ReadWriteBuffer;
 import org.apache.hadoop.util.Progress;
 
 import org.junit.Assert;

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/test/java/org/apache/hadoop/mapred/nativetask/kvtest/TestInputFile.java

@@ -22,7 +22,6 @@ import java.util.HashMap;
 import java.util.Random;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.BooleanWritable;
 import org.apache.hadoop.io.ByteWritable;

hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/terasort/TeraChecksum.java

@@ -25,7 +25,6 @@ import org.apache.hadoop.conf.Configured;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.NullWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.mapreduce.Cluster;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.Mapper;
 import org.apache.hadoop.mapreduce.Reducer;

hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/terasort/TeraGen.java

@@ -33,7 +33,6 @@ import org.apache.hadoop.io.NullWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.io.WritableUtils;
-import org.apache.hadoop.mapreduce.Cluster;
 import org.apache.hadoop.mapreduce.Counter;
 import org.apache.hadoop.mapreduce.InputFormat;
 import org.apache.hadoop.mapreduce.InputSplit;

hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/terasort/TeraValidate.java

@@ -26,7 +26,6 @@ import org.apache.hadoop.conf.Configured;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.BytesWritable;
 import org.apache.hadoop.io.Text;
-import org.apache.hadoop.mapreduce.Cluster;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.Mapper;
 import org.apache.hadoop.mapreduce.Reducer;