HBASE-7188 Move classes into hbase-client

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1449950 13f79535-47bb-0310-9956-ffa450edef68

hbase-client/pom.xml

@@ -58,6 +58,15 @@
             <groupId>org.apache.hbase</groupId>
             <artifactId>hbase-common</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.apache.hbase</groupId>
+            <artifactId>hbase-prefix-tree</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.hbase</groupId>
+            <artifactId>hbase-common</artifactId>
+            <type>test-jar</type>
+        </dependency>
         <dependency>
             <groupId>org.apache.hbase</groupId>
             <artifactId>hbase-protocol</artifactId>

hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterId.java

@@ -18,14 +18,14 @@
 
 package org.apache.hadoop.hbase;
 
-import java.util.UUID;
-
+import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.ClusterIdProtos;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.protobuf.InvalidProtocolBufferException;
+import java.util.UUID;
 
 /**
  * The identifier for this cluster.

hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java

@@ -19,13 +19,7 @@
 
 package org.apache.hadoop.hbase;
 
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.LinkedList;
-import java.util.Map;
-
+import com.google.protobuf.ByteString;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.master.RegionState;
@@ -40,7 +34,12 @@ import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionSpecifier.Re
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.io.VersionedWritable;
 
-import com.google.protobuf.ByteString;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Map;
 
 /**
  * Status information on the HBase cluster.

hbase-client/src/main/java/org/apache/hadoop/hbase/Coprocessor.java

@@ -15,11 +15,11 @@
 
 package org.apache.hadoop.hbase;
 
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+
 /**
  * Coprocess interface.
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java

@@ -15,13 +15,13 @@
 
 package org.apache.hadoop.hbase;
 
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.client.HTableInterface;
 
+import java.io.IOException;
+
 /**
  * Coprocessor environment state.
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java

@@ -18,6 +18,24 @@
  */
 package org.apache.hadoop.hbase;
 
+import com.google.common.base.Preconditions;
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
+import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
+import org.apache.hadoop.hbase.io.compress.Compression;
+import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BytesBytesPair;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ColumnFamilySchema;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
+import org.apache.hadoop.hbase.regionserver.BloomType;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.io.WritableComparable;
+
 import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
@@ -27,28 +45,6 @@ import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.DeserializationException;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
-import org.apache.hadoop.hbase.io.compress.Compression;
-import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
-import org.apache.hadoop.hbase.io.hfile.HFile;
-import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BytesBytesPair;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ColumnFamilySchema;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
-import org.apache.hadoop.hbase.regionserver.BloomType;
-import org.apache.hadoop.hbase.regionserver.wal.HLog;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.io.Text;
-import org.apache.hadoop.io.WritableComparable;
-
-import com.google.common.base.Preconditions;
-import com.google.protobuf.ByteString;
-import com.google.protobuf.InvalidProtocolBufferException;
-
 /**
  * An HColumnDescriptor contains information about a column family such as the
  * number of versions, compression settings, etc.
@@ -165,7 +161,7 @@ public class HColumnDescriptor implements WritableComparable<HColumnDescriptor>
   /**
    * Default size of blocks in files stored to the filesytem (hfiles).
    */
-  public static final int DEFAULT_BLOCKSIZE = HFile.DEFAULT_BLOCKSIZE;
+  public static final int DEFAULT_BLOCKSIZE = HConstants.DEFAULT_BLOCKSIZE;
 
   /**
    * Default setting for whether or not to use bloomfilters.
@@ -454,10 +450,10 @@ public class HColumnDescriptor implements WritableComparable<HColumnDescriptor>
           Bytes.toString(b));
       }
     }
-    byte[] recoveredEdit = Bytes.toBytes(HLog.RECOVERED_EDITS_DIR);
+    byte[] recoveredEdit = Bytes.toBytes(HConstants.RECOVERED_EDITS_DIR);
     if (Bytes.equals(recoveredEdit, b)) {
       throw new IllegalArgumentException("Family name cannot be: " +
-          HLog.RECOVERED_EDITS_DIR);
+          HConstants.RECOVERED_EDITS_DIR);
     }
     return b;
   }

hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java

@@ -18,23 +18,15 @@
  */
 package org.apache.hadoop.hbase;
 
-import java.io.ByteArrayInputStream;
-import java.io.DataInput;
-import java.io.DataInputStream;
-import java.io.DataOutput;
-import java.io.EOFException;
-import java.io.IOException;
-import java.io.SequenceInputStream;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.KeyValue.KVComparator;
 import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionInfo;
@@ -45,8 +37,16 @@ import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.util.PairOfSameType;
 import org.apache.hadoop.io.DataInputBuffer;
 
-import com.google.protobuf.ByteString;
-import com.google.protobuf.InvalidProtocolBufferException;
+import java.io.ByteArrayInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.SequenceInputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 
 /**
  * HRegion information.

hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java

@@ -18,6 +18,23 @@
  */
 package org.apache.hadoop.hbase;
 
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
+import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BytesBytesPair;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ColumnFamilySchema;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.TableSchema;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.Writables;
+import org.apache.hadoop.io.WritableComparable;
+
 import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
@@ -34,23 +51,6 @@ import java.util.TreeMap;
 import java.util.TreeSet;
 import java.util.regex.Matcher;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
-import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BytesBytesPair;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ColumnFamilySchema;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.TableSchema;
-import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.Writables;
-import org.apache.hadoop.io.WritableComparable;
-
-import com.google.protobuf.ByteString;
-import com.google.protobuf.InvalidProtocolBufferException;
-
 /**
  * HTableDescriptor contains the details about an HBase table  such as the descriptors of
  * all the column families, is the table a catalog table, <code> -ROOT- </code> or 

hbase-client/src/main/java/org/apache/hadoop/hbase/RegionLoad.java

@@ -20,11 +20,9 @@
 
 package org.apache.hadoop.hbase;
 
-import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.util.Bytes;
-import java.util.TreeSet;
-import java.util.Set;
 
 /**
   * Encapsulates per-region load metrics.

hbase-client/src/main/java/org/apache/hadoop/hbase/RegionTransition.java

@@ -17,16 +17,15 @@
  */
 package org.apache.hadoop.hbase;
 
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.executor.EventHandler;
-import org.apache.hadoop.hbase.executor.EventHandler.EventType;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
+import org.apache.hadoop.hbase.executor.EventType;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.protobuf.ByteString;
-import com.google.protobuf.InvalidProtocolBufferException;
-
 /**
  * Current state of a region in transition.  Holds state of a region as it moves through the
  * steps that take it from offline to open, etc.  Used by regionserver, master, and zk packages.
@@ -49,8 +48,8 @@ public class RegionTransition {
     this.rt = rt;
   }
 
-  public EventHandler.EventType getEventType() {
-    return EventHandler.EventType.get(this.rt.getEventTypeCode());
+  public EventType getEventType() {
+    return EventType.get(this.rt.getEventTypeCode());
   }
 
   public ServerName getServerName() {

hbase-client/src/main/java/org/apache/hadoop/hbase/RemoteExceptionHandler.java

@@ -18,13 +18,13 @@
  */
 package org.apache.hadoop.hbase;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.ipc.RemoteException;
+
 import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.ipc.RemoteException;
-
 /**
  * An immutable class which contains a static method for handling
  * org.apache.hadoop.ipc.RemoteException exceptions.

hbase-client/src/main/java/org/apache/hadoop/hbase/ServerLoad.java

@@ -20,21 +20,19 @@
 
 package org.apache.hadoop.hbase;
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-import java.util.TreeSet;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.Coprocessor;
-import org.apache.hadoop.hbase.RegionLoad;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Strings;
 
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
 /**
  * This class is used for exporting current state of load on a RegionServer.
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/ServerName.java

@@ -18,17 +18,17 @@
  */
 package org.apache.hadoop.hbase;
 
-import java.util.Collection;
-import java.util.regex.Pattern;
-
+import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.RootRegionServer;
 import org.apache.hadoop.hbase.util.Addressing;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.protobuf.InvalidProtocolBufferException;
+import java.util.Collection;
+import java.util.regex.Pattern;
 
 /**
  * Instance of an HBase ServerName.

hbase-client/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java

@@ -17,6 +17,27 @@
  */
 package org.apache.hadoop.hbase.catalog;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.Abortable;
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.client.AdminProtocol;
+import org.apache.hadoop.hbase.client.HConnection;
+import org.apache.hadoop.hbase.client.HConnectionManager;
+import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.RetriesExhaustedException;
+import org.apache.hadoop.hbase.exceptions.NotAllMetaRegionsOnlineException;
+import org.apache.hadoop.hbase.exceptions.ServerNotRunningYetException;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.zookeeper.MetaNodeTracker;
+import org.apache.hadoop.hbase.zookeeper.RootRegionTracker;
+import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
+import org.apache.hadoop.ipc.RemoteException;
+
 import java.io.EOFException;
 import java.io.IOException;
 import java.net.ConnectException;
@@ -26,27 +47,6 @@ import java.net.SocketTimeoutException;
 import java.net.UnknownHostException;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.Abortable;
-import org.apache.hadoop.hbase.HRegionInfo;
-import org.apache.hadoop.hbase.NotAllMetaRegionsOnlineException;
-import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.client.AdminProtocol;
-import org.apache.hadoop.hbase.client.HConnection;
-import org.apache.hadoop.hbase.client.HConnectionManager;
-import org.apache.hadoop.hbase.client.HTable;
-import org.apache.hadoop.hbase.client.RetriesExhaustedException;
-import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
-import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.zookeeper.MetaNodeTracker;
-import org.apache.hadoop.hbase.zookeeper.RootRegionTracker;
-import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
-import org.apache.hadoop.ipc.RemoteException;
-
 /**
  * Tracks the availability of the catalog tables <code>-ROOT-</code> and
  * <code>.META.</code>.

hbase-client/src/main/java/org/apache/hadoop/hbase/catalog/MetaReader.java

@@ -17,14 +17,6 @@
  */
 package org.apache.hadoop.hbase.catalog;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.NavigableMap;
-import java.util.Set;
-import java.util.TreeMap;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -41,6 +33,14 @@ import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.Set;
+import java.util.TreeMap;
+
 /**
  * Reads region and assignment information from <code>.META.</code>.
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AbstractClientScanner.java

@@ -17,12 +17,12 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.IOException;
-import java.util.Iterator;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+import java.util.Iterator;
+
 /**
  * Helper class for custom client scanners.
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AdminProtocol.java

@@ -21,8 +21,8 @@ package org.apache.hadoop.hbase.client;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.IpcProtocol;
 import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.AdminService;
-import org.apache.hadoop.hbase.security.TokenInfo;
 import org.apache.hadoop.hbase.security.KerberosInfo;
+import org.apache.hadoop.hbase.security.TokenInfo;
 
 /**
  * Protocol that a HBase client uses to communicate with a region server.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java

@@ -17,15 +17,15 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.KeyValue;
 import org.apache.hadoop.hbase.util.Bytes;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 /**
  * Performs Append operations on a single row.
  * <p>

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Attributes.java

@@ -19,11 +19,11 @@
 
 package org.apache.hadoop.hbase.client;
 
-import java.util.Map;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.util.Map;
+
 @InterfaceAudience.Public
 @InterfaceStability.Stable
 public interface Attributes {

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientProtocol.java

@@ -22,8 +22,8 @@ import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.IpcProtocol;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService;
-import org.apache.hadoop.hbase.security.TokenInfo;
 import org.apache.hadoop.hbase.security.KerberosInfo;
+import org.apache.hadoop.hbase.security.TokenInfo;
 
 /**
  * Protocol that a HBase client uses to communicate with a region server.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java

@@ -17,28 +17,27 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.LinkedList;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.KeyValue;
-import org.apache.hadoop.hbase.NotServingRegionException;
-import org.apache.hadoop.hbase.OutOfOrderScannerNextException;
-import org.apache.hadoop.hbase.UnknownScannerException;
 import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.NotServingRegionException;
+import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
+import org.apache.hadoop.hbase.exceptions.RegionServerStoppedException;
+import org.apache.hadoop.hbase.exceptions.UnknownScannerException;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.MapReduceProtos;
-import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
 import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.io.DataOutputBuffer;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.LinkedList;
 
 /**
  * Implements the scanner interface for the HBase client.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java

@@ -18,18 +18,8 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.io.InterruptedIOException;
-import java.net.SocketTimeoutException;
-import java.util.Arrays;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.concurrent.Callable;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.regex.Pattern;
-
+import com.google.protobuf.ByteString;
+import com.google.protobuf.ServiceException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -37,26 +27,31 @@ import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Abortable;
 import org.apache.hadoop.hbase.ClusterStatus;
-import org.apache.hadoop.hbase.DeserializationException;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.HTableDescriptor;
-import org.apache.hadoop.hbase.MasterNotRunningException;
-import org.apache.hadoop.hbase.NotServingRegionException;
-import org.apache.hadoop.hbase.RegionException;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.TableExistsException;
-import org.apache.hadoop.hbase.TableNotEnabledException;
-import org.apache.hadoop.hbase.TableNotFoundException;
-import org.apache.hadoop.hbase.UnknownRegionException;
-import org.apache.hadoop.hbase.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.catalog.CatalogTracker;
 import org.apache.hadoop.hbase.catalog.MetaReader;
 import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitor;
 import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitorBase;
+import org.apache.hadoop.hbase.exceptions.DeserializationException;
+import org.apache.hadoop.hbase.exceptions.FailedLogCloseException;
+import org.apache.hadoop.hbase.exceptions.HBaseSnapshotException;
+import org.apache.hadoop.hbase.exceptions.MasterNotRunningException;
+import org.apache.hadoop.hbase.exceptions.NotServingRegionException;
+import org.apache.hadoop.hbase.exceptions.RegionException;
+import org.apache.hadoop.hbase.exceptions.RestoreSnapshotException;
+import org.apache.hadoop.hbase.exceptions.SnapshotCreationException;
+import org.apache.hadoop.hbase.exceptions.TableExistsException;
+import org.apache.hadoop.hbase.exceptions.TableNotEnabledException;
+import org.apache.hadoop.hbase.exceptions.TableNotFoundException;
+import org.apache.hadoop.hbase.exceptions.UnknownRegionException;
+import org.apache.hadoop.hbase.exceptions.UnknownSnapshotException;
+import org.apache.hadoop.hbase.exceptions.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
 import org.apache.hadoop.hbase.ipc.MasterCoprocessorRpcChannel;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
@@ -105,12 +100,7 @@ import org.apache.hadoop.hbase.protobuf.generated.MasterMonitorProtos.GetSchemaA
 import org.apache.hadoop.hbase.protobuf.generated.MasterMonitorProtos.GetSchemaAlterStatusResponse;
 import org.apache.hadoop.hbase.protobuf.generated.MasterMonitorProtos.GetTableDescriptorsRequest;
 import org.apache.hadoop.hbase.protobuf.generated.MasterMonitorProtos.GetTableDescriptorsResponse;
-import org.apache.hadoop.hbase.regionserver.wal.FailedLogCloseException;
-import org.apache.hadoop.hbase.snapshot.HBaseSnapshotException;
-import org.apache.hadoop.hbase.snapshot.RestoreSnapshotException;
-import org.apache.hadoop.hbase.snapshot.SnapshotCreationException;
-import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
-import org.apache.hadoop.hbase.snapshot.UnknownSnapshotException;
+import org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;
 import org.apache.hadoop.hbase.util.Addressing;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
@@ -119,8 +109,17 @@ import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.util.StringUtils;
 import org.apache.zookeeper.KeeperException;
 
-import com.google.protobuf.ByteString;
-import com.google.protobuf.ServiceException;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.net.SocketTimeoutException;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.regex.Pattern;
 
 /**
  * Provides an interface to manage HBase database table metadata + general
@@ -184,7 +183,7 @@ public class HBaseAdmin implements Abortable, Closeable {
   /**
    * @return A new CatalogTracker instance; call {@link #cleanupCatalogTracker(CatalogTracker)}
    * to cleanup the returned catalog tracker.
-   * @throws ZooKeeperConnectionException
+   * @throws org.apache.hadoop.hbase.exceptions.ZooKeeperConnectionException
    * @throws IOException
    * @see #cleanupCatalogTracker(CatalogTracker)
    */
@@ -363,7 +362,7 @@ public class HBaseAdmin implements Abortable, Closeable {
    *
    * @throws IllegalArgumentException if the table name is reserved
    * @throws MasterNotRunningException if master is not running
-   * @throws TableExistsException if table already exists (If concurrent
+   * @throws org.apache.hadoop.hbase.exceptions.TableExistsException if table already exists (If concurrent
    * threads, the table may have been created between test-for-existence
    * and attempt-at-creation).
    * @throws IOException
@@ -396,7 +395,7 @@ public class HBaseAdmin implements Abortable, Closeable {
    * @throws IllegalArgumentException if the table name is reserved, if the split keys
    * are repeated and if the split key has empty byte array.
    * @throws MasterNotRunningException if master is not running
-   * @throws TableExistsException if table already exists (If concurrent
+   * @throws org.apache.hadoop.hbase.exceptions.TableExistsException if table already exists (If concurrent
    * threads, the table may have been created between test-for-existence
    * and attempt-at-creation).
    * @throws IOException
@@ -485,7 +484,7 @@ public class HBaseAdmin implements Abortable, Closeable {
    * @throws IllegalArgumentException Bad table name, if the split keys
    * are repeated and if the split key has empty byte array.
    * @throws MasterNotRunningException if master is not running
-   * @throws TableExistsException if table already exists (If concurrent
+   * @throws org.apache.hadoop.hbase.exceptions.TableExistsException if table already exists (If concurrent
    * threads, the table may have been created between test-for-existence
    * and attempt-at-creation).
    * @throws IOException
@@ -1643,7 +1642,7 @@ public class HBaseAdmin implements Abortable, Closeable {
   /**
    * Query on the catalog janitor state (Enabled/Disabled?)
    * @throws ServiceException
-   * @throws MasterNotRunningException
+   * @throws org.apache.hadoop.hbase.exceptions.MasterNotRunningException
    */
   public boolean isCatalogJanitorEnabled() throws ServiceException, MasterNotRunningException {
     MasterAdminKeepAliveConnection master = connection.getKeepAliveMasterAdmin();
@@ -2216,7 +2215,7 @@ public class HBaseAdmin implements Abortable, Closeable {
     long maxPauseTime = max / this.numRetries;
     int tries = 0;
     LOG.debug("Waiting a max of " + max + " ms for snapshot '" +
-        SnapshotDescriptionUtils.toString(snapshot) + "'' to complete. (max " +
+        ClientSnapshotDescriptionUtils.toString(snapshot) + "'' to complete. (max " +
         maxPauseTime + " ms per retry)");
     while (tries == 0
         || ((EnvironmentEdgeManager.currentTimeMillis() - start) < max && !done.getDone())) {
@@ -2258,7 +2257,7 @@ public class HBaseAdmin implements Abortable, Closeable {
    */
   public TakeSnapshotResponse takeSnapshotAsync(SnapshotDescription snapshot) throws IOException,
       SnapshotCreationException {
-    SnapshotDescriptionUtils.assertSnapshotRequestIsValid(snapshot);
+    ClientSnapshotDescriptionUtils.assertSnapshotRequestIsValid(snapshot);
     final TakeSnapshotRequest request = TakeSnapshotRequest.newBuilder().setSnapshot(snapshot)
         .build();
     // run the snapshot on the master
@@ -2459,7 +2458,7 @@ public class HBaseAdmin implements Abortable, Closeable {
    */
   private RestoreSnapshotResponse internalRestoreSnapshotAsync(final SnapshotDescription snapshot)
       throws IOException, RestoreSnapshotException {
-    SnapshotDescriptionUtils.assertSnapshotRequestIsValid(snapshot);
+    ClientSnapshotDescriptionUtils.assertSnapshotRequestIsValid(snapshot);
 
     final RestoreSnapshotRequest request = RestoreSnapshotRequest.newBuilder().setSnapshot(snapshot)
         .build();

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnection.java

@@ -18,11 +18,6 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.List;
-import java.util.concurrent.ExecutorService;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
@@ -31,13 +26,18 @@ import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.HTableDescriptor;
 import org.apache.hadoop.hbase.MasterAdminProtocol;
 import org.apache.hadoop.hbase.MasterMonitorProtocol;
-import org.apache.hadoop.hbase.MasterNotRunningException;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.catalog.CatalogTracker;
 import org.apache.hadoop.hbase.client.coprocessor.Batch;
+import org.apache.hadoop.hbase.exceptions.MasterNotRunningException;
+import org.apache.hadoop.hbase.exceptions.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+
 /**
  * Cluster connection.  Hosts a connection to the ZooKeeper ensemble and
  * thereafter into the HBase cluster.  Knows how to locate regions out on the cluster,

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java

@@ -18,62 +18,34 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.lang.reflect.Proxy;
-import java.lang.reflect.UndeclaredThrowableException;
-import java.net.InetSocketAddress;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.NavigableMap;
-import java.util.Map.Entry;
-import java.util.Set;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.CopyOnWriteArraySet;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Future;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-
+import com.google.protobuf.ServiceException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Chore;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.IpcProtocol;
 import org.apache.hadoop.hbase.KeyValue;
 import org.apache.hadoop.hbase.MasterAdminProtocol;
 import org.apache.hadoop.hbase.MasterMonitorProtocol;
-import org.apache.hadoop.hbase.MasterNotRunningException;
 import org.apache.hadoop.hbase.MasterProtocol;
-import org.apache.hadoop.hbase.IpcProtocol;
-import org.apache.hadoop.hbase.RegionMovedException;
 import org.apache.hadoop.hbase.RemoteExceptionHandler;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.Stoppable;
-import org.apache.hadoop.hbase.TableNotFoundException;
-import org.apache.hadoop.hbase.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitor;
 import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitorBase;
 import org.apache.hadoop.hbase.client.coprocessor.Batch;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.MasterNotRunningException;
+import org.apache.hadoop.hbase.exceptions.RegionMovedException;
+import org.apache.hadoop.hbase.exceptions.TableNotFoundException;
+import org.apache.hadoop.hbase.exceptions.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.ipc.HBaseClientRPC;
 import org.apache.hadoop.hbase.ipc.ProtobufRpcClientEngine;
 import org.apache.hadoop.hbase.ipc.RpcClientEngine;
@@ -97,7 +69,34 @@ import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.zookeeper.KeeperException;
 
-import com.google.protobuf.ServiceException;
+import java.io.Closeable;
+import java.io.IOException;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.lang.reflect.UndeclaredThrowableException;
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.NavigableMap;
+import java.util.Set;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArraySet;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
 
 /**
  * A non-instantiable class that manages {@link HConnection}s.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java

@@ -18,25 +18,8 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.io.InterruptedIOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.NavigableMap;
-import java.util.TreeMap;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Future;
-import java.util.concurrent.SynchronousQueue;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
-
+import com.google.protobuf.Service;
+import com.google.protobuf.ServiceException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -68,8 +51,24 @@ import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.util.Threads;
 
-import com.google.protobuf.Service;
-import com.google.protobuf.ServiceException;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.TreeMap;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
 
 /**
  * <p>Used to communicate with a single HBase table.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableInterface.java

@@ -18,11 +18,6 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-
 import com.google.protobuf.Service;
 import com.google.protobuf.ServiceException;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -33,6 +28,11 @@ import org.apache.hadoop.hbase.KeyValue;
 import org.apache.hadoop.hbase.client.coprocessor.Batch;
 import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
 /**
  * Used to communicate with a single HBase table.
  *

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableInterfaceFactory.java

@@ -18,12 +18,12 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 
+import java.io.IOException;
+
 
 /**
  * Defines methods to create new HTableInterface.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java

@@ -19,6 +19,16 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.HRegionLocation;
+import org.apache.hadoop.hbase.exceptions.ZooKeeperConnectionException;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
+
 import java.io.IOException;
 import java.util.AbstractMap.SimpleEntry;
 import java.util.ArrayList;
@@ -32,16 +42,6 @@ import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.HRegionInfo;
-import org.apache.hadoop.hbase.HRegionLocation;
-import org.apache.hadoop.hbase.ZooKeeperConnectionException;
-import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
-
 /**
  * HTableMultiplexer provides a thread-safe non blocking PUT API across all the tables.
  * Each put will be sharded into different buffer queues based on its destination region server.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTablePool.java

@@ -18,12 +18,6 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-
 import com.google.protobuf.Service;
 import com.google.protobuf.ServiceException;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -38,6 +32,12 @@ import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.PoolMap;
 import org.apache.hadoop.hbase.util.PoolMap.PoolType;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
 /**
  * A simple pool of HTable instances.
  *

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableUtil.java

@@ -18,20 +18,16 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.HRegionLocation;
+
 import java.io.IOException;
-import java.lang.InterruptedException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.HRegionLocation;
-import org.apache.hadoop.hbase.client.HTable;
-import org.apache.hadoop.hbase.client.Put;
-import org.apache.hadoop.hbase.client.Row;
-
 /**
  * Utility class for HTable.
  * 

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Increment.java

@@ -18,17 +18,17 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.io.TimeRange;
+import org.apache.hadoop.hbase.util.Bytes;
+
 import java.io.IOException;
 import java.util.Map;
 import java.util.NavigableMap;
 import java.util.Set;
 import java.util.TreeMap;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.io.TimeRange;
-import org.apache.hadoop.hbase.util.Bytes;
-
 /**
  * Used to perform Increment operations on a single row.
  * <p>

hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaScanner.java

@@ -19,14 +19,6 @@
 
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.NavigableMap;
-import java.util.TreeMap;
-import java.util.TreeSet;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -34,11 +26,19 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.TableNotFoundException;
 import org.apache.hadoop.hbase.client.HConnectionManager.HConnectable;
+import org.apache.hadoop.hbase.exceptions.TableNotFoundException;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.PairOfSameType;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.NavigableMap;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
 /**
  * Scanner class that contains the <code>.META.</code> table scanning logic
  * and uses a Retryable scanner. Provided visitors will be called

hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiAction.java

@@ -18,16 +18,16 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.util.Bytes;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeMap;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.util.Bytes;
-
 /**
  * Container for Actions (i.e. Get, Delete, or Put), which are grouped by
  * regionName. Intended to be used with HConnectionManager.processBatch()

hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiResponse.java

@@ -24,10 +24,10 @@ import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
-import java.util.ArrayList;
 import java.util.TreeMap;
 
 /**

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java

@@ -19,6 +19,12 @@
 
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.KeyValue;
+import org.apache.hadoop.hbase.util.Bytes;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -26,12 +32,6 @@ import java.util.Map;
 import java.util.TreeMap;
 import java.util.UUID;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.KeyValue;
-import org.apache.hadoop.hbase.util.Bytes;
-
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public abstract class Mutation extends OperationWithAttributes implements Row {

hbase-client/src/main/java/org/apache/hadoop/hbase/client/NoServerForRegionException.java

@@ -20,7 +20,7 @@ package org.apache.hadoop.hbase.client;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.RegionException;
+import org.apache.hadoop.hbase.exceptions.RegionException;
 
 /**
  * Thrown when no region server can be found for a region

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Operation.java

@@ -18,13 +18,13 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.IOException;
-import java.util.Map;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.codehaus.jackson.map.ObjectMapper;
 
+import java.io.IOException;
+import java.util.Map;
+
 /**
  * Superclass for any type that maps to a potentially application-level query.
  * (e.g. Put, Get, Delete, Scan, Next, etc.)

hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java

@@ -19,15 +19,15 @@
 
 package org.apache.hadoop.hbase.client;
 
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.ClassSize;
 
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public abstract class OperationWithAttributes extends Operation implements Attributes {

hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionOfflineException.java

@@ -20,7 +20,7 @@ package org.apache.hadoop.hbase.client;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.RegionException;
+import org.apache.hadoop.hbase.exceptions.RegionException;
 
 /** Thrown when a table can not be located */
 @InterfaceAudience.Public

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java

@@ -19,6 +19,12 @@
 
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.KeyValue;
+import org.apache.hadoop.hbase.KeyValue.SplitKeyValue;
+import org.apache.hadoop.hbase.util.Bytes;
+
 import java.nio.BufferOverflowException;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
@@ -29,12 +35,6 @@ import java.util.Map;
 import java.util.NavigableMap;
 import java.util.TreeMap;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.KeyValue;
-import org.apache.hadoop.hbase.KeyValue.SplitKeyValue;
-import org.apache.hadoop.hbase.util.Bytes;
-
 /**
  * Single row result of a {@link Get} or {@link Scan} query.<p>
  *

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java

@@ -18,12 +18,12 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import java.io.Closeable;
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.Closeable;
+import java.io.IOException;
+
 /**
  * Interface for client-side scanning.
  * Go to {@link HTable} to obtain instances.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetriesExhaustedException.java

@@ -14,13 +14,13 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+
 import java.io.IOException;
 import java.util.Date;
 import java.util.List;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-
 /**
  * Exception thrown by HTable methods when an attempt to do something (like
  * commit changes) fails after a bunch of retries.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetriesExhaustedWithDetailsException.java

@@ -21,7 +21,7 @@ package org.apache.hadoop.hbase.client;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 import org.apache.hadoop.hbase.util.Bytes;
 
 import java.io.PrintWriter;

hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowMutations.java

@@ -17,17 +17,17 @@
  */
 package org.apache.hadoop.hbase.client;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.util.Bytes;
+
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.util.Bytes;
-
 /**
  * Performs multiple mutations atomically on a single row.
  * Currently {@link Put} and {@link Delete} are supported.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallable.java

@@ -18,31 +18,30 @@
 
 package org.apache.hadoop.hbase.client;
 
-import java.io.IOException;
-import java.net.UnknownHostException;
-
+import com.google.protobuf.ServiceException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HRegionLocation;
-import org.apache.hadoop.hbase.NotServingRegionException;
 import org.apache.hadoop.hbase.RemoteExceptionHandler;
-import org.apache.hadoop.hbase.UnknownScannerException;
 import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.NotServingRegionException;
+import org.apache.hadoop.hbase.exceptions.RegionServerStoppedException;
+import org.apache.hadoop.hbase.exceptions.UnknownScannerException;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.RequestConverter;
 import org.apache.hadoop.hbase.protobuf.ResponseConverter;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
-import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.net.DNS;
 
-import com.google.protobuf.ServiceException;
+import java.io.IOException;
+import java.net.UnknownHostException;
 
 /**
  * Retries scanner operations such as create, next, etc.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerTimeoutException.java

@@ -21,7 +21,7 @@ package org.apache.hadoop.hbase.client;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 
 /**
  * Thrown when a scanner has timed out.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ServerCallable.java

@@ -19,6 +19,18 @@
 
 package org.apache.hadoop.hbase.client;
 
+import com.google.protobuf.ServiceException;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.HRegionLocation;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
+import org.apache.hadoop.hbase.ipc.HBaseClientRPC;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
+import org.apache.hadoop.ipc.RemoteException;
+
 import java.io.IOException;
 import java.lang.reflect.UndeclaredThrowableException;
 import java.net.ConnectException;
@@ -27,19 +39,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.Callable;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.HRegionLocation;
-import org.apache.hadoop.hbase.ipc.HBaseClientRPC;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
-import org.apache.hadoop.ipc.RemoteException;
-
-import com.google.protobuf.ServiceException;
-
 /**
  * Abstract class that implements {@link Callable}.  Implementation stipulates
  * return type and method we actually invoke on remote Server.  Usually

hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/AggregationClient.java

@@ -19,20 +19,8 @@
 
 package org.apache.hadoop.hbase.client.coprocessor;
 
-import java.io.IOException;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.lang.reflect.ParameterizedType;
-import java.lang.reflect.Type;
-import java.nio.ByteBuffer;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.NavigableMap;
-import java.util.NavigableSet;
-import java.util.TreeMap;
-import java.util.concurrent.atomic.AtomicLong;
-
+import com.google.protobuf.ByteString;
+import com.google.protobuf.Message;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -44,18 +32,25 @@ import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.coprocessor.ColumnInterpreter;
+import org.apache.hadoop.hbase.ipc.BlockingRpcCallback;
+import org.apache.hadoop.hbase.ipc.ServerRpcController;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.AggregateProtos.AggregateArgument;
 import org.apache.hadoop.hbase.protobuf.generated.AggregateProtos.AggregateResponse;
 import org.apache.hadoop.hbase.protobuf.generated.AggregateProtos.AggregateService;
-import org.apache.hadoop.hbase.coprocessor.ColumnInterpreter;
-import org.apache.hadoop.hbase.ipc.BlockingRpcCallback;
-import org.apache.hadoop.hbase.ipc.ServerRpcController;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 
-import com.google.protobuf.ByteString;
-import com.google.protobuf.Message;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.NavigableSet;
+import java.util.TreeMap;
+import java.util.concurrent.atomic.AtomicLong;
 
 /**
  * This client class is for invoking the aggregate functions deployed on the

hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/Batch.java

@@ -19,11 +19,11 @@
 
 package org.apache.hadoop.hbase.client.coprocessor;
 
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+
 
 /**
  * A collection of interfaces and utilities used for interacting with custom RPC

hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java

@@ -18,8 +18,6 @@
  */
 package org.apache.hadoop.hbase.client.coprocessor;
 
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.KeyValue;
@@ -28,6 +26,8 @@ import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.EmptyMsg;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.LongMsg;
 import org.apache.hadoop.hbase.util.Bytes;
 
+import java.io.IOException;
+
 /**
  * a concrete column interpreter implementation. The cell value is a Long value
  * and its promoted data type is also a Long value. For computing aggregation

hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/SecureBulkLoadClient.java

@@ -26,7 +26,7 @@ import org.apache.hadoop.hbase.ipc.BlockingRpcCallback;
 import org.apache.hadoop.hbase.ipc.ServerRpcController;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;
 import org.apache.hadoop.hbase.protobuf.generated.SecureBulkLoadProtos;
-import org.apache.hadoop.hbase.security.access.SecureBulkLoadEndpoint;
+import org.apache.hadoop.hbase.security.SecureBulkLoadUtil;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.security.token.Token;
 
@@ -170,6 +170,6 @@ public class SecureBulkLoadClient {
   }
 
   public Path getStagingPath(String bulkToken, byte[] family) throws IOException {
-    return SecureBulkLoadEndpoint.getStagingPath(table.getConfiguration(), bulkToken, family);
+    return SecureBulkLoadUtil.getStagingPath(table.getConfiguration(), bulkToken, family);
   }
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java

@@ -18,10 +18,6 @@
  */
 package org.apache.hadoop.hbase.client.replication;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.Map;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
@@ -33,6 +29,10 @@ import org.apache.hadoop.hbase.replication.ReplicationZookeeper;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.apache.zookeeper.KeeperException;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Map;
+
 /**
  * <p>
  * This class provides the administrative interface to HBase cluster

hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java

@@ -19,16 +19,13 @@
 
 package org.apache.hadoop.hbase.coprocessor;
 
-import java.io.IOException;
-
+import com.google.protobuf.Message;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.KeyValue;
-import org.apache.hadoop.hbase.client.coprocessor.AggregationClient;
 import org.apache.hadoop.hbase.client.coprocessor.LongColumnInterpreter;
 
-import com.google.protobuf.ByteString;
-import com.google.protobuf.Message;
+import java.io.IOException;
 
 /**
  * Defines how value for specific column is interpreted and provides utility
@@ -47,9 +44,9 @@ import com.google.protobuf.Message;
  * <S>. There is a conversion method
  * {@link ColumnInterpreter#castToReturnType(Object)} which takes a <T> type and
  * returns a <S> type.
- * The {@link AggregateImplementation} uses PB messages to initialize the 
+ * The AggregateImplementation uses PB messages to initialize the
  * user's ColumnInterpreter implementation, and for sending the responses
- * back to {@link AggregationClient}.
+ * back to AggregationClient.
  * @param <T> Cell value data type
  * @param <S> Promoted data type
  * @param <P> PB message that is used to transport initializer specific bytes

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/AccessDeniedException.java

@@ -15,9 +15,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.security;
+package org.apache.hadoop.hbase.exceptions;
 
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 
 /**
  * Exception thrown by access-related methods.

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/CallerDisconnectedException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.ipc;
+package org.apache.hadoop.hbase.exceptions;
 
 import java.io.IOException;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ClockOutOfSyncException.java

@@ -16,7 +16,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
+package org.apache.hadoop.hbase.exceptions;
 
 import java.io.IOException;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ConstraintException.java

@@ -15,10 +15,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.constraint;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.client.Put;
 
 /**
@@ -29,7 +28,7 @@ import org.apache.hadoop.hbase.client.Put;
  * idempotent).
  */
 @InterfaceAudience.Private
-public class ConstraintException extends DoNotRetryIOException {
+public class ConstraintException extends org.apache.hadoop.hbase.exceptions.DoNotRetryIOException {
   private static final long serialVersionUID = 1197446454511704140L;
 
   public ConstraintException() {

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/CoprocessorException.java

@@ -16,11 +16,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.coprocessor;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 
 /**
  * Thrown if a coprocessor encounters any exception.

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/CorruptHFileException.java

@@ -15,10 +15,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.io.hfile;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 
 /**
  * This exception is thrown when attempts to read an HFile fail due to corruption or truncation
@@ -28,11 +28,11 @@ import org.apache.hadoop.hbase.DoNotRetryIOException;
 public class CorruptHFileException extends DoNotRetryIOException {
   private static final long serialVersionUID = 1L;
 
-  CorruptHFileException(String m, Throwable t) {
+  public CorruptHFileException(String m, Throwable t) {
     super(m, t);
   }
 
-  CorruptHFileException(String m) {
+  public CorruptHFileException(String m) {
     super(m);
   }
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/CorruptedSnapshotException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.snapshot;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/DeserializationException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/DoNotRetryIOException.java

@@ -16,14 +16,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
 /**
  * Subclass if exception is not meant to be retried: e.g.
- * {@link UnknownScannerException}
+ * {@link org.apache.hadoop.hbase.exceptions.UnknownScannerException}
  */
 @InterfaceAudience.Public
 @InterfaceStability.Stable

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/DroppedSnapshotException.java

@@ -12,12 +12,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
-import java.io.IOException;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+
 
 /**
  * Thrown during flush if the possibility snapshot content was not properly

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ExportSnapshotException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.snapshot;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedLogCloseException.java

@@ -16,12 +16,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.regionserver.wal;
-
-import java.io.IOException;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 
+import java.io.IOException;
+
 /**
  * Thrown when we fail close of the write-ahead-log file.
  * Package private.  Only used inside this package.

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedSanityCheckException.java

@@ -15,12 +15,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
+package org.apache.hadoop.hbase.exceptions;
 
 /**
  * Exception thrown if a mutation fails sanity checks.
  */
-public class FailedSanityCheckException extends DoNotRetryIOException {
+public class FailedSanityCheckException extends org.apache.hadoop.hbase.exceptions.DoNotRetryIOException {
 
   private static final long serialVersionUID = 1788783640409186240L;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FileSystemVersionException.java

@@ -17,7 +17,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.hbase.util;
+package org.apache.hadoop.hbase.exceptions;
 
 import java.io.IOException;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/HBaseException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/HBaseIOException.java

@@ -15,13 +15,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
-
-import java.io.IOException;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+
 /**
  * All hbase specific IOExceptions should be subclasses of HBaseIOException
  */

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/HBaseSnapshotException.java

@@ -15,11 +15,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.snapshot;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.hbase.HBaseIOException;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
 
 /**

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/InvalidFamilyOperationException.java

@@ -16,13 +16,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase;
-
-import java.io.IOException;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+
 /**
  * Thrown if a request is table schema modification is requested but
  * made for an invalid family name.

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/InvalidHFileException.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.io.hfile;
+package org.apache.hadoop.hbase.exceptions;
 
 import java.io.IOException;
 

hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/LeaseException.java

@@ -16,10 +16,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.hadoop.hbase.regionserver;
+package org.apache.hadoop.hbase.exceptions;
 
 import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.exceptions.DoNotRetryIOException;
 
 /**
  * Reports a problem with a lease