HDFS-10862. Typos in 4 log messages. Contributed by Mehran Hassani.

(cherry picked from commit b09a03cd7d26cf96ec26a81ba11f00778241eb3e)
(cherry picked from commit 214b6d16d5822d2be861ae8ee5f2782ddeeef49b)

hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java

@@ -813,7 +813,7 @@ public class RpcProgramNfs3 extends RpcProgram implements Nfs3Interface {
       attrs = Nfs3Utils.getFileAttr(dfsClient, Nfs3Utils.getFileIdPath(handle),
           iug);
       if (readCount < count) {
-        LOG.info("Partical read. Asked offset: " + offset + " count: " + count
+        LOG.info("Partial read. Asked offset: " + offset + " count: " + count
             + " and read back: " + readCount + " file size: "
             + attrs.getSize());
       }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java

@@ -201,7 +201,7 @@ class FsVolumeList {
                 + " " + bpid + " on volume " + v + ": " + timeTaken + "ms");
           } catch (ClosedChannelException e) {
             FsDatasetImpl.LOG.info("The volume " + v + " is closed while " +
-                "addng replicas, ignored.");
+                "adding replicas, ignored.");
           } catch (IOException ioe) {
             FsDatasetImpl.LOG.info("Caught exception while adding replicas " +
                 "from " + v + ". Will throw later.", ioe);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java

@@ -315,7 +315,7 @@ public class FSDirectory implements Closeable {
     int threshold = conf.getInt(
         DFSConfigKeys.DFS_NAMENODE_NAME_CACHE_THRESHOLD_KEY,
         DFSConfigKeys.DFS_NAMENODE_NAME_CACHE_THRESHOLD_DEFAULT);
-    NameNode.LOG.info("Caching file names occuring more than " + threshold
+    NameNode.LOG.info("Caching file names occurring more than " + threshold
         + " times");
     nameCache = new NameCache<ByteArray>(threshold);
     namesystem = ns;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNStorage.java

@@ -239,7 +239,7 @@ public class NNStorage extends Storage implements Closeable,
     /* We don't want more than one thread trying to restore at a time */
     synchronized (this.restorationLock) {
       LOG.info("NNStorage.attemptRestoreRemovedStorage: check removed(failed) "+
-               "storarge. removedStorages size = " + removedStorageDirs.size());
+               "storage. removedStorages size = " + removedStorageDirs.size());
       for(Iterator<StorageDirectory> it
             = this.removedStorageDirs.iterator(); it.hasNext();) {
         StorageDirectory sd = it.next();