HBASE-22725 Remove all remaining javadoc warnings

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

@@ -76,7 +76,7 @@ public BufferedMutatorParams operationTimeout(final int operationTimeout) {
   }
 
   /**
-   * @deprecated Since 2.3.0, will be removed in 4.0.0. Use {@link #operationTimeout()}
+   * @deprecated Since 2.3.0, will be removed in 4.0.0. Use {@link #operationTimeout(int)}
    */
   @Deprecated
   public BufferedMutatorParams opertationTimeout(final int operationTimeout) {

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

@@ -431,9 +431,10 @@ private void waitForRegion() throws InterruptedIOException {
      * regions. 3) check the total concurrent tasks. 4) check the concurrent
      * tasks for server.
      *
-     * @param loc
-     * @param heapSizeOfRow
-     * @return either Include {@link ReturnCode} or Skip {@link ReturnCode}
+     * @param loc the destination of data
+     * @param heapSizeOfRow the data size
+     * @return either Include {@link RequestController.ReturnCode} or Skip
+     *         {@link RequestController.ReturnCode}
      */
     @Override
     public ReturnCode canTakeOperation(HRegionLocation loc, long heapSizeOfRow) {

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

@@ -176,9 +176,9 @@ default Result get(Get get) throws IOException {
    * @throws IOException if a remote or network exception occurs.
    * @since 0.90.0
    * @apiNote {@link #put(List)} runs pre-flight validations on the input list on client.
-   *   Currently {@link #get(List)} doesn't run any validations on the client-side, currently there
-   *   is no need, but this may change in the future. An
-   * {@link IllegalArgumentException} will be thrown in this case.
+   *          Currently {@link #get(List)} doesn't run any validations on the client-side,
+   *          currently there is no need, but this may change in the future. An
+   *          {@link IllegalArgumentException} will be thrown in this case.
    */
   default Result[] get(List<Get> gets) throws IOException {
     throw new NotImplementedException("Add an implementation!");
@@ -284,10 +284,10 @@ default void delete(Delete delete) throws IOException {
    * that have not be successfully applied.
    * @since 0.20.1
    * @apiNote In 3.0.0 version, the input list {@code deletes} will no longer be modified. Also,
-   * {@link #put(List)} runs pre-flight validations on the input list on client. Currently
-   * {@link #delete(List)} doesn't run validations on the client, there is no need currently,
-   * but this may change in the future. An * {@link IllegalArgumentException} will be thrown
-   * in this case.
+   *          {@link #put(List)} runs pre-flight validations on the input list on client. Currently
+   *          {@link #delete(List)} doesn't run validations on the client, there is no need
+   *          currently, but this may change in the future. An * {@link IllegalArgumentException}
+   *          will be thrown in this case.
    */
   default void delete(List<Delete> deletes) throws IOException {
     throw new NotImplementedException("Add an implementation!");

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

@@ -39,7 +39,7 @@ public abstract class Batch {
    * the implementations {@link Batch.Call#call(Object)} method will be invoked
    * with a proxy to each region's coprocessor {@link com.google.protobuf.Service} implementation.
    * </p>
-   * @see org.apache.hadoop.hbase.client.coprocessor
+   * @see org.apache.hadoop.hbase.client.coprocessor.Batch
    * @see org.apache.hadoop.hbase.client.Table#coprocessorService(byte[])
    * @see org.apache.hadoop.hbase.client.Table#coprocessorService(Class, byte[], byte[],
    * org.apache.hadoop.hbase.client.coprocessor.Batch.Call)

hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/snapshot/ExportSnapshot.java

@@ -267,9 +267,10 @@ private Path getOutputPath(final SnapshotFileInfo inputInfo) throws IOException
       return new Path(outputArchive, path);
     }
 
+    @SuppressWarnings("checkstyle:linelength")
     /**
      * Used by TestExportSnapshot to test for retries when failures happen.
-     * Failure is injected in {@link #copyFile(Context, SnapshotFileInfo, Path)}.
+     * Failure is injected in {@link #copyFile(Mapper.Context, org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotFileInfo, Path)}.
      */
     private void injectTestFailure(final Context context, final SnapshotFileInfo inputInfo)
         throws IOException {

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java

@@ -1529,11 +1529,11 @@ static class RAMCache {
     /**
      * Defined the map as {@link ConcurrentHashMap} explicitly here, because in
      * {@link RAMCache#get(BlockCacheKey)} and
-     * {@link RAMCache#putIfAbsent(BlockCacheKey, RAMQueueEntry)} , we need to guarantee the
-     * atomicity of map#computeIfPresent(key, func) and map#putIfAbsent(key, func). Besides, the
-     * func method can execute exactly once only when the key is present(or absent) and under the
-     * lock context. Otherwise, the reference count of block will be messed up. Notice that the
-     * {@link java.util.concurrent.ConcurrentSkipListMap} can not guarantee that.
+     * {@link RAMCache#putIfAbsent(BlockCacheKey, BucketCache.RAMQueueEntry)} , we need to
+     * guarantee the atomicity of map#computeIfPresent(key, func) and map#putIfAbsent(key, func).
+     * Besides, the func method can execute exactly once only when the key is present(or absent)
+     * and under the lock context. Otherwise, the reference count of block will be messed up.
+     * Notice that the {@link java.util.concurrent.ConcurrentSkipListMap} can not guarantee that.
      */
     final ConcurrentHashMap<BlockCacheKey, RAMQueueEntry> delegate = new ConcurrentHashMap<>();
 

hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateNode.java

@@ -99,7 +99,7 @@ public AssignmentProcedureEvent(final RegionInfo regionInfo) {
 
   /**
    * Updated whenever a call to {@link #setRegionLocation(ServerName)} or
-   * {@link #setState(State, State...)}.
+   * {@link #setState(RegionState.State, RegionState.State...)}.
    */
   private volatile long lastUpdate = 0;
 

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java

@@ -4047,7 +4047,7 @@ public OperationStatus[] batchReplay(MutationReplay[] mutations, long replaySeqI
    * a batch are stored with highest durability specified of for all operations in a batch,
    * except for {@link Durability#SKIP_WAL}.
    *
-   * <p>This function is called from {@link #batchReplay(MutationReplay[], long)} with
+   * <p>This function is called from {@link #batchReplay(WALSplitUtil.MutationReplay[], long)} with
    * {@link ReplayBatchOperation} instance and {@link #batchMutate(Mutation[], long, long)} with
    * {@link MutationBatchOperation} instance as an argument. As the processing of replay batch
    * and mutation batch is very similar, lot of code is shared by providing generic methods in
@@ -4058,7 +4058,7 @@ public OperationStatus[] batchReplay(MutationReplay[] mutations, long replaySeqI
    * @param batchOp contains the list of mutations
    * @return an array of OperationStatus which internally contains the
    *         OperationStatusCode and the exceptionMessage if any.
-   * @throws IOException
+   * @throws IOException if an IO problem is encountered
    */
   OperationStatus[] batchMutate(BatchOperation<?> batchOp) throws IOException {
     boolean initialized = false;

hbase-server/src/main/java/org/apache/hadoop/hbase/tool/BulkLoadHFilesTool.java

@@ -453,7 +453,8 @@ private boolean checkHFilesCountPerRegionPerFamily(
   }
 
   /**
-   * @param table the table to load into
+   * @param conn the HBase cluster connection
+   * @param tableName the table name of the table to load into
    * @param pool the ExecutorService
    * @param queue the queue for LoadQueueItem
    * @param startEndKeys start and end keys

hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java

@@ -2038,22 +2038,23 @@ public HRegion createLocalHRegion(RegionInfo info, TableDescriptor desc, WAL wal
     return HRegion.createHRegion(info, getDataTestDir(), getConfiguration(), desc, wal);
   }
 
-  /**
-   * @param tableName
-   * @param startKey
-   * @param stopKey
-   * @param callingMethod
-   * @param conf
-   * @param isReadOnly
-   * @param families
-   * @throws IOException
-   * @return A region on which you must call
-             {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)} when done.
-   * @deprecated since 2.0.0 and will be removed in 3.0.0. Use
-   *   {@link #createLocalHRegion(TableName, byte[], byte[], boolean, Durability, WAL, byte[]...)}
-   *   instead.
-   * @see #createLocalHRegion(TableName, byte[], byte[], boolean, Durability, WAL, byte[]...)
-   * @see <a href="https://issues.apache.org/jira/browse/HBASE-13893">HBASE-13893</a>
+  @SuppressWarnings("checkstyle:linelength")
+  /**
+   * @param tableName the name of the table
+   * @param startKey the start key of the region
+   * @param stopKey the start key of the region
+   * @param callingMethod the name of the calling method probably a test method
+   * @param conf the configuration to use
+   * @param isReadOnly true if the table is read only, false otherwise
+   * @param families the column families to use
+   * @throws IOException if an IO problem is encountered
+   * @return A region on which you must call {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)}
+   *         when done.
+   *         @deprecated since 2.0.0 and will be removed in 3.0.0. Use
+   *         {@link HBaseTestingUtility#createLocalHRegion(TableName, byte[], byte[], boolean, Durability, WAL, byte[]...)}
+   *         instead.
+   *         @see HBaseTestingUtility#createLocalHRegion(TableName, byte[], byte[], boolean, Durability, WAL, byte[]...)
+   *         @see <a href="https://issues.apache.org/jira/browse/HBASE-13893">HBASE-13893</a>
    */
   @Deprecated
   public HRegion createLocalHRegion(byte[] tableName, byte[] startKey, byte[] stopKey,
@@ -3292,10 +3293,9 @@ public boolean visit(Result r) throws IOException {
    * Waits for a table to be 'enabled'.  Enabled means that table is set as 'enabled' and the
    * regions have been all assigned.  Will timeout after default period (30 seconds)
    * Tolerates nonexistent table.
-   * @param table Table to wait on.
-   * @param table
-   * @throws InterruptedException
-   * @throws IOException
+   * @param table the table to wait on.
+   * @throws InterruptedException if interrupted while waiting
+   * @throws IOException if an IO problem is encountered
    */
   public void waitTableEnabled(TableName table)
       throws InterruptedException, IOException {

hbase-server/src/test/java/org/apache/hadoop/hbase/master/MockRegionServer.java

@@ -153,8 +153,8 @@ class MockRegionServer implements AdminProtos.AdminService.BlockingInterface,
   private final Random random = new Random();
 
   /**
-   * Map of regions to map of rows and {@link Result}.  Used as data source when
-   * {@link #get(RpcController, GetRequest)} is called. Because we have a byte
+   * Map of regions to map of rows and {@link Result}. Used as data source when
+   * {@link #get(RpcController, ClientProtos.GetRequest)} is called. Because we have a byte
    * key, need to use TreeMap and provide a Comparator.  Use
    * {@link #setGetResult(byte[], byte[], Result)} filling this map.
    */
@@ -205,10 +205,11 @@ int getThenIncrement() {
   }
 
   /**
-   * Use this method filling the backing data source used by {@link #get(RpcController, GetRequest)}
-   * @param regionName
-   * @param row
-   * @param r
+   * Use this method filling the backing data source used by
+   * {@link #get(RpcController, ClientProtos.GetRequest)}
+   * @param regionName the region name to assign
+   * @param row the row key
+   * @param r the single row result
    */
   void setGetResult(final byte [] regionName, final byte [] row, final Result r) {
     Map<byte [], Result> value = this.gets.get(regionName);

hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/TestFlushSnapshotFromClient.java

@@ -284,7 +284,7 @@ public void testSnapshotFailsOnNonExistantTable() throws Exception {
    * complete on the server by repeatedly checking the master.
    * @param master the master running the snapshot
    * @param snapshot the snapshot to check
-   * @param sleep amount to sleep between checks to see if the snapshot is done
+   * @param timeoutNanos the timeout in nano between checks to see if the snapshot is done
    */
   private static void waitForSnapshotToComplete(HMaster master,
       SnapshotProtos.SnapshotDescription snapshot, long timeoutNanos) throws Exception {

pom.xml

@@ -3761,6 +3761,15 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
+        <configuration>
+          <tags>
+            <tag>
+              <name>apiNote</name>
+              <placement>a</placement>
+              <head>API Note:</head>
+            </tag>
+          </tags>
+        </configuration>
         <reportSets>
           <!-- Dev API -->
           <reportSet>