HDFS-10995. Ozone: Move ozone XceiverClient to hdfs-client. Contributed by Chen Liang.

hadoop-hdfs-project/hadoop-hdfs-client/pom.xml

@@ -111,6 +111,10 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
           <groupId>com.fasterxml.jackson.core</groupId>
           <artifactId>jackson-annotations</artifactId>
       </dependency>
+      <dependency>
+          <groupId>io.netty</groupId>
+          <artifactId>netty-all</artifactId>
+      </dependency>
   </dependencies>
 
   <build>
@@ -158,6 +162,7 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
                   <include>inotify.proto</include>
                   <include>erasurecoding.proto</include>
                   <include>ReconfigurationProtocol.proto</include>
+                  <include>DatanodeContainerProtocol.proto</include>
                 </includes>
               </source>
               <output>${project.build.directory}/generated-sources/java</output>

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/ScmConfigKeys.java

@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.hadoop.scm;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+
+/**
+ * This class contains constants for configuration keys used in SCM
+ */
+@InterfaceAudience.Public
+@InterfaceStability.Unstable
+public final class ScmConfigKeys {
+  public static final String DFS_CONTAINER_IPC_PORT =
+      "dfs.container.ipc";
+  public static final int DFS_CONTAINER_IPC_PORT_DEFAULT = 50011;
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/transport/client/XceiverClient.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClient.java

@@ -16,7 +16,7 @@
  *  limitations under the License.
  */
 
-package org.apache.hadoop.ozone.container.common.transport.client;
+package org.apache.hadoop.scm;
 
 import com.google.common.base.Preconditions;
 import io.netty.bootstrap.Bootstrap;
@@ -29,8 +29,7 @@ import io.netty.handler.logging.LoggingHandler;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
-import org.apache.hadoop.ozone.OzoneConfigKeys;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -84,8 +83,8 @@ public class XceiverClient implements Closeable {
     // port.
     int port = leader.getContainerPort();
     if (port == 0) {
-      port = config.getInt(OzoneConfigKeys.DFS_CONTAINER_IPC_PORT,
-          OzoneConfigKeys.DFS_CONTAINER_IPC_PORT_DEFAULT);
+      port = config.getInt(ScmConfigKeys.DFS_CONTAINER_IPC_PORT,
+          ScmConfigKeys.DFS_CONTAINER_IPC_PORT_DEFAULT);
     }
     LOG.debug("Connecting to server Port : " + port);
     channelFuture = b.connect(leader.getHostName(), port).sync();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/transport/client/XceiverClientHandler.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientHandler.java

@@ -15,13 +15,13 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.apache.hadoop.ozone.container.common.transport.client;
+package org.apache.hadoop.scm;
 
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/transport/client/XceiverClientInitializer.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientInitializer.java

@@ -15,7 +15,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.apache.hadoop.ozone.container.common.transport.client;
+package org.apache.hadoop.scm;
 
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.ChannelPipeline;
@@ -24,8 +24,8 @@ import io.netty.handler.codec.protobuf.ProtobufDecoder;
 import io.netty.handler.codec.protobuf.ProtobufEncoder;
 import io.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder;
 import io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 /**
  * Setup the netty pipeline.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/transport/client/XceiverClientManager.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientManager.java

@@ -16,14 +16,14 @@
  *  limitations under the License.
  */
 
-package org.apache.hadoop.ozone.container.common.transport.client;
+package org.apache.hadoop.scm;
 
 import java.io.IOException;
 
 import com.google.common.base.Preconditions;
 
-import org.apache.hadoop.ozone.OzoneConfiguration;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 /**
  * XceiverClientManager is responsible for the lifecycle of XceiverClient
@@ -38,14 +38,15 @@ import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
  */
 public class XceiverClientManager {
 
-  private final OzoneConfiguration conf;
+  //TODO : change this to SCM configuration class
+  private final Configuration conf;
 
   /**
    * Creates a new XceiverClientManager.
    *
    * @param conf configuration
    */
-  public XceiverClientManager(OzoneConfiguration conf) {
+  public XceiverClientManager(Configuration conf) {
     Preconditions.checkNotNull(conf);
     this.conf = conf;
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/Pipeline.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/Pipeline.java

@@ -16,7 +16,7 @@
  *  limitations under the License.
  */
 
-package org.apache.hadoop.ozone.container.common.helpers;
+package org.apache.hadoop.scm.container.common.helpers;
 
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.scm.container.common.helpers;
+/**
+ Contains protocol buffer helper classes and utilites used in
+ impl.
+ **/

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/transport/client/package-info.java → hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/package-info.java

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.ozone.container.common.transport.client;
+package org.apache.hadoop.scm;
 
 /**
  * This package contains classes for the client of the storage container

hadoop-hdfs-project/hadoop-hdfs/pom.xml

@@ -352,7 +352,6 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
                   <include>QJournalProtocol.proto</include>
                   <include>editlog.proto</include>
                   <include>fsimage.proto</include>
-                  <include>DatanodeContainerProtocol.proto</include>
                   <include>StorageContainerLocationProtocol.proto</include>
                 </includes>
               </source>

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ChunkUtils.java

@@ -25,6 +25,7 @@ import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.ozone.OzoneConsts;
 import org.apache.hadoop.ozone.container.common.impl.ChunkManagerImpl;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/impl/ChunkManagerImpl.java

@@ -21,7 +21,7 @@ import com.google.common.base.Preconditions;
 import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.ozone.container.common.helpers.ChunkInfo;
 import org.apache.hadoop.ozone.container.common.helpers.ChunkUtils;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.interfaces.ChunkManager;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerManager;
 import org.slf4j.Logger;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerManagerImpl.java

@@ -30,7 +30,7 @@ import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.ozone.OzoneConsts;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.interfaces.ChunkManager;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerLocationManager;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerManager;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/impl/Dispatcher.java

@@ -31,7 +31,7 @@ import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils;
 import org.apache.hadoop.ozone.container.common.helpers.KeyData;
 import org.apache.hadoop.ozone.container.common.helpers.KeyUtils;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerManager;
 import org.slf4j.Logger;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/impl/KeyManagerImpl.java

@@ -25,7 +25,7 @@ import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
 import org.apache.hadoop.ozone.container.common.helpers.KeyData;
 import org.apache.hadoop.ozone.container.common.helpers.KeyUtils;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerManager;
 import org.apache.hadoop.ozone.container.common.interfaces.KeyManager;
 import org.apache.hadoop.ozone.container.common.utils.ContainerCache;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/ChunkManager.java

@@ -19,7 +19,7 @@
 package org.apache.hadoop.ozone.container.common.interfaces;
 
 import org.apache.hadoop.ozone.container.common.helpers.ChunkInfo;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 import java.io.IOException;
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/ContainerManager.java

@@ -25,7 +25,7 @@ import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
 import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
 import org.apache.hadoop.hdfs.util.RwLock;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 import java.io.IOException;
 import java.nio.file.Path;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/KeyManager.java

@@ -18,7 +18,7 @@
 package org.apache.hadoop.ozone.container.common.interfaces;
 
 import org.apache.hadoop.ozone.container.common.helpers.KeyData;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 import java.io.IOException;
 import java.util.List;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/storage/StorageContainerManager.java

@@ -78,9 +78,9 @@ import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
 import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.apache.hadoop.ozone.OzoneClientUtils;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClientManager;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.XceiverClient;
+import org.apache.hadoop.scm.XceiverClientManager;
 import org.apache.hadoop.ozone.protocol.LocatedContainer;
 import org.apache.hadoop.ozone.protocol.StorageContainerLocationProtocol;
 import org.apache.hadoop.ozone.protocol.proto.StorageContainerLocationProtocolProtos;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/ChunkInputStream.java

@@ -29,8 +29,8 @@ import com.google.protobuf.ByteString;
 
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ReadChunkResponseProto;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ChunkInfo;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClientManager;
+import org.apache.hadoop.scm.XceiverClient;
+import org.apache.hadoop.scm.XceiverClientManager;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;
 import org.apache.hadoop.ozone.web.handlers.UserArgs;
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/ChunkOutputStream.java

@@ -31,8 +31,8 @@ import com.google.protobuf.ByteString;
 
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ChunkInfo;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyData;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClientManager;
+import org.apache.hadoop.scm.XceiverClient;
+import org.apache.hadoop.scm.XceiverClientManager;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;
 import org.apache.hadoop.ozone.web.handlers.UserArgs;
 import org.apache.hadoop.ozone.web.response.KeyInfo;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/ContainerProtocolCalls.java

@@ -36,7 +36,7 @@ import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ReadChunkRequ
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ReadChunkResponseProto;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.Type;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.WriteChunkRequestProto;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
+import org.apache.hadoop.scm.XceiverClient;
 import org.apache.hadoop.ozone.web.exceptions.ErrorTable;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;
 import org.apache.hadoop.ozone.web.handlers.UserArgs;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/DistributedStorageHandler.java

@@ -39,9 +39,9 @@ import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.server.datanode.fsdataset.LengthInputStream;
 import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.apache.hadoop.ozone.OzoneConsts;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClientManager;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.XceiverClient;
+import org.apache.hadoop.scm.XceiverClientManager;
 import org.apache.hadoop.ozone.protocol.LocatedContainer;
 import org.apache.hadoop.ozone.protocolPB.StorageContainerLocationProtocolClientSideTranslatorPB;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ContainerTestHelper.java

@@ -28,7 +28,7 @@ import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
 import org.apache.hadoop.ozone.OzoneConsts;
 import org.apache.hadoop.ozone.container.common.helpers.ChunkInfo;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.helpers.KeyData;
 import org.junit.Assert;
 

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/common/impl/TestContainerPersistence.java

@@ -31,7 +31,7 @@ import org.apache.hadoop.ozone.container.common.helpers.ChunkInfo;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils;
 import org.apache.hadoop.ozone.container.common.helpers.KeyData;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.utils.LevelDBStore;
 import org.apache.hadoop.ozone.web.utils.OzoneUtils;
 import org.junit.After;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ozoneimpl/TestOzoneContainer.java

@@ -22,8 +22,8 @@ import org.apache.hadoop.ozone.MiniOzoneCluster;
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.apache.hadoop.ozone.container.ContainerTestHelper;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.XceiverClient;
 import org.apache.hadoop.ozone.web.utils.OzoneUtils;
 import org.junit.Assert;
 import org.junit.Rule;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/transport/server/TestContainerServer.java

@@ -25,11 +25,11 @@ import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ContainerComm
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.apache.hadoop.ozone.container.ContainerTestHelper;
-import org.apache.hadoop.ozone.container.common.helpers.Pipeline;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
 import org.apache.hadoop.ozone.container.common.interfaces.ContainerManager;
 import org.apache.hadoop.ozone.container.common.impl.Dispatcher;
-import org.apache.hadoop.ozone.container.common.transport.client.XceiverClient;
+import org.apache.hadoop.scm.XceiverClient;
 import org.apache.hadoop.ozone.container.common.transport.server.XceiverServer;
 import org.apache.hadoop.ozone.container.common.transport.server.XceiverServerHandler;