HDDS-843. [JDK11] Fix Javadoc errors in hadoop-hdds-server-scm module. Contributed by Dinesh Chitlangia.

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/exceptions/package-info.java

@@ -1,18 +1,19 @@
 /**
- * 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
- * <p/>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p/>
+ * 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.
+ * 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.hdds.scm.exceptions;
-// Exceptions thrown by SCM.
+// Exceptions thrown by SCM.

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/NodeManager.java

@@ -23,7 +23,6 @@ import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
 import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
 import org.apache.hadoop.hdds.scm.container.placement.metrics.SCMNodeMetric;
 import org.apache.hadoop.hdds.scm.container.placement.metrics.SCMNodeStat;
-import org.apache.hadoop.hdds.scm.exceptions.SCMException;
 import org.apache.hadoop.hdds.scm.node.states.NodeNotFoundException;
 import org.apache.hadoop.hdds.protocol.DatanodeDetails;
 import org.apache.hadoop.hdds.protocol.proto.HddsProtos.NodeState;
@@ -40,17 +39,17 @@ import java.util.UUID;
 
 /**
  * A node manager supports a simple interface for managing a datanode.
- * <p/>
+ * <p>
  * 1. A datanode registers with the NodeManager.
- * <p/>
+ * <p>
  * 2. If the node is allowed to register, we add that to the nodes that we need
  * to keep track of.
- * <p/>
+ * <p>
  * 3. A heartbeat is made by the node at a fixed frequency.
- * <p/>
+ * <p>
  * 4. A node can be in any of these 4 states: {HEALTHY, STALE, DEAD,
  * DECOMMISSIONED}
- * <p/>
+ * <p>
  * HEALTHY - It is a datanode that is regularly heartbeating us.
  *
  * STALE - A datanode for which we have missed few heart beats.
@@ -135,8 +134,8 @@ public interface NodeManager extends StorageContainerNodeProtocol,
    * Remaps datanode to containers mapping to the new set of containers.
    * @param datanodeDetails - DatanodeDetails
    * @param containerIds - Set of containerIDs
-   * @throws SCMException - if datanode is not known. For new datanode use
-   *                        addDatanodeInContainerMap call.
+   * @throws NodeNotFoundException - if datanode is not known. For new datanode
+   *                        use addDatanodeInContainerMap call.
    */
   void setContainers(DatanodeDetails datanodeDetails,
       Set<ContainerID> containerIds) throws NodeNotFoundException;

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/SCMNodeManager.java

@@ -24,7 +24,6 @@ import org.apache.hadoop.hdds.protocol.proto
 import org.apache.hadoop.hdds.scm.container.ContainerID;
 import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
 import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
-import org.apache.hadoop.hdds.scm.exceptions.SCMException;
 import org.apache.hadoop.hdds.scm.node.states.NodeAlreadyExistsException;
 import org.apache.hadoop.hdds.scm.node.states.NodeNotFoundException;
 import org.apache.hadoop.hdds.scm.server.StorageContainerManager;
@@ -281,7 +280,6 @@ public class SCMNodeManager
    *
    * @param datanodeDetails - DatanodeDetailsProto.
    * @return SCMheartbeat response.
-   * @throws IOException
    */
   @Override
   public List<SCMCommand> processHeartbeat(DatanodeDetails datanodeDetails) {
@@ -396,8 +394,8 @@ public class SCMNodeManager
    * Update set of containers available on a datanode.
    * @param datanodeDetails - DatanodeID
    * @param containerIds - Set of containerIDs
-   * @throws SCMException - if datanode is not known. For new datanode use
-   *                        addDatanodeInContainerMap call.
+   * @throws NodeNotFoundException - if datanode is not known. For new datanode
+   *                        use addDatanodeInContainerMap call.
    */
   @Override
   public void setContainers(DatanodeDetails datanodeDetails,

hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/HddsTestUtils.java

@@ -69,7 +69,7 @@ public final class HddsTestUtils {
    * Creates list of ContainerInfo.
    *
    * @param numContainers number of ContainerInfo to be included in list.
-   * @return List<ContainerInfo>
+   * @return {@literal List<ContainerInfo>}
    */
   public static List<ContainerInfo> getContainerInfo(int numContainers) {
     List<ContainerInfo> containerInfoList = new ArrayList<>();