HBASE-22962 Fix typo in javadoc description (#569)

Signed-off-by: Duo Zhang <zhangduo@apache.org>

hbase-common/src/main/java/org/apache/hadoop/hbase/util/CommonFSUtils.java

@@ -337,7 +337,7 @@ public abstract class CommonFSUtils {
   }
 
   /**
-   * Return the 'path' component of a Path.  In Hadoop, Path is an URI.  This
+   * Return the 'path' component of a Path.  In Hadoop, Path is a URI.  This
    * method returns the 'path' component of a Path's URI: e.g. If a Path is
    * <code>hdfs://example.org:9000/hbase_trunk/TestTable/compaction.dir</code>,
    * this method returns <code>/hbase_trunk/TestTable/compaction.dir</code>.

hbase-http/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java

@@ -119,7 +119,7 @@ public class JMXJsonServlet extends HttpServlet {
   /**
    * If query string includes 'description', then we will emit bean and attribute descriptions to
    * output IFF they are not null and IFF the description is not the same as the attribute name:
-   * i.e. specify an URL like so: /jmx?description=true
+   * i.e. specify a URL like so: /jmx?description=true
    */
   private static final String INCLUDE_DESCRIPTION = "description";
 

hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestGlobalFilter.java

@@ -114,7 +114,7 @@ public class TestGlobalFilter extends HttpServerFunctionalTest {
   public void testServletFilter() throws Exception {
     Configuration conf = new Configuration();
 
-    //start a http server with CountingFilter
+    //start an http server with CountingFilter
     conf.set(HttpServer.FILTER_INITIALIZERS_PROPERTY,
         RecordingFilter.Initializer.class.getName());
     HttpServer http = createTestServer(conf);

hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestPathFilter.java

@@ -115,7 +115,7 @@ public class TestPathFilter extends HttpServerFunctionalTest {
   public void testPathSpecFilters() throws Exception {
     Configuration conf = new Configuration();
 
-    //start a http server with CountingFilter
+    //start an http server with CountingFilter
     conf.set(HttpServer.FILTER_INITIALIZERS_PROPERTY,
         RecordingFilter.Initializer.class.getName());
     String[] pathSpecs = { "/path", "/path/*" };

hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestServletFilter.java

@@ -125,7 +125,7 @@ public class TestServletFilter extends HttpServerFunctionalTest {
   public void testServletFilter() throws Exception {
     Configuration conf = new Configuration();
 
-    //start a http server with CountingFilter
+    //start an http server with CountingFilter
     conf.set(HttpServer.FILTER_INITIALIZERS_PROPERTY,
         SimpleFilter.Initializer.class.getName());
     HttpServer http = createTestServer(conf);
@@ -187,7 +187,7 @@ public class TestServletFilter extends HttpServerFunctionalTest {
   @Test
   public void testServletFilterWhenInitThrowsException() throws Exception {
     Configuration conf = new Configuration();
-    // start a http server with ErrorFilter
+    // start an http server with ErrorFilter
     conf.set(HttpServer.FILTER_INITIALIZERS_PROPERTY,
         ErrorFilter.Initializer.class.getName());
     HttpServer http = createTestServer(conf);

hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Response.java

@@ -29,7 +29,7 @@ import org.apache.http.Header;
 import org.apache.http.HttpResponse;
 
 /**
- * The HTTP result code, response headers, and body of a HTTP response.
+ * The HTTP result code, response headers, and body of an HTTP response.
  */
 @InterfaceAudience.Public
 public class Response {

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

@@ -34,9 +34,9 @@ public class CacheableDeserializerIdManager {
   private static final AtomicInteger identifier = new AtomicInteger(0);
 
   /**
-   * Register the given cacheable deserializer and generate an unique identifier
-   * id for it
-   * @param cd
+   * Register the given {@link Cacheable} -- usually an hfileblock instance, these implement
+   * the Cacheable Interface -- deserializer and generate a unique identifier id for it and return
+   * this as our result.
    * @return the identifier of given cacheable deserializer
    */
   public static int registerDeserializer(CacheableDeserializer<Cacheable> cd) {

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

@@ -457,7 +457,7 @@ public class HMaster extends HRegionServer implements MasterServices {
         redirectHost = request.getServerName();
         if(!Addressing.isLocalAddress(InetAddress.getByName(redirectHost))) {
           LOG.warn("Couldn't resolve '" + redirectHost + "' as an address local to this node and '" +
-              MASTER_HOSTNAME_KEY + "' is not set; client will get a HTTP 400 response. If " +
+              MASTER_HOSTNAME_KEY + "' is not set; client will get an HTTP 400 response. If " +
               "your HBase deployment relies on client accessible names that the region server process " +
               "can't resolve locally, then you should set the previously mentioned configuration variable " +
               "to an appropriate hostname.");

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

@@ -105,7 +105,7 @@ public class ReplicationSyncUp extends Configured implements Tool {
     ZKWatcher zkw;
 
     DummyServer(ZKWatcher zkw) {
-      // an unique name in case the first run fails
+      // a unique name in case the first run fails
       hostname = System.currentTimeMillis() + ".SyncUpTool.replication.org";
       this.zkw = zkw;
     }

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

@@ -59,7 +59,7 @@ public abstract class GenericTestUtils {
 
   /**
    * Generates a process-wide unique sequence number.
-   * @return an unique sequence number
+   * @return a unique sequence number
    */
   public static int uniqueSequenceId() {
     return sequence.incrementAndGet();