HDFS-11201. Spelling errors in the logging, help, assertions and exception messages. Contributed by Grant Sohn.

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

@@ -1052,7 +1052,7 @@ public class DFSInputStream extends FSInputStream
             reader.getNetworkDistance(), nread);
         if (nread != len) {
           throw new IOException("truncated return from reader.read(): " +
-              "excpected " + len + ", got " + nread);
+              "expected " + len + ", got " + nread);
         }
         DFSClientFaultInjector.get().readFromDatanodeDelay();
         return;

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/util/LongBitFormat.java

@@ -57,11 +57,11 @@ public class LongBitFormat implements Serializable {
   public long combine(long value, long record) {
     if (value < MIN) {
       throw new IllegalArgumentException(
-          "Illagal value: " + NAME + " = " + value + " < MIN = " + MIN);
+          "Illegal value: " + NAME + " = " + value + " < MIN = " + MIN);
     }
     if (value > MAX) {
       throw new IllegalArgumentException(
-          "Illagal value: " + NAME + " = " + value + " > MAX = " + MAX);
+          "Illegal value: " + NAME + " = " + value + " > MAX = " + MAX);
     }
     return (record & ~MASK) | (value << OFFSET);
   }

hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/lib/server/ServerException.java

@@ -38,7 +38,7 @@ public class ServerException extends XException {
     S04("Service [{0}] does not implement declared interface [{1}]"),
     S05("[{0}] is not a file"),
     S06("Could not load file [{0}], {1}"),
-    S07("Could not instanciate service class [{0}], {1}"),
+    S07("Could not instantiate service class [{0}], {1}"),
     S08("Could not load service classes, {0}"),
     S09("Could not set service [{0}] programmatically -server shutting down-, {1}"),
     S10("Service [{0}] requires service [{1}]"),

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

@@ -130,7 +130,7 @@ class OpenFileCtxCache {
           }
           toEvict = openFileMap.remove(pairs.getKey());
           Preconditions.checkState(toEvict == pairs.getValue(),
-              "The deleted entry is not the same as odlest found.");
+              "The deleted entry is not the same as oldest found.");
         }
       }
       openFileMap.put(h, context);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java

@@ -1364,7 +1364,7 @@ public class DFSUtil {
         DFSConfigKeys.DFS_HTTP_POLICY_DEFAULT);
     HttpConfig.Policy policy = HttpConfig.Policy.fromString(policyStr);
     if (policy == null) {
-      throw new HadoopIllegalArgumentException("Unregonized value '"
+      throw new HadoopIllegalArgumentException("Unrecognized value '"
           + policyStr + "' for " + DFSConfigKeys.DFS_HTTP_POLICY_KEY);
     }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java

@@ -2772,7 +2772,7 @@ public class BlockManager implements BlockStatsMXBean {
       throws IOException {
     for (ReportedBlockInfo rbi : rbis) {
       if (LOG.isDebugEnabled()) {
-        LOG.debug("Processing previouly queued message " + rbi);
+        LOG.debug("Processing previously queued message " + rbi);
       }
       if (rbi.getReportedState() == null) {
         // This is a DELETE_BLOCK request

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

@@ -836,7 +836,7 @@ class BlockPoolSlice {
     } catch (Exception e) {
       // Any exception we need to revert back to read from disk
       // Log the error and return false
-      LOG.info("Exception occured while reading the replicas cache file: "
+      LOG.info("Exception occurred while reading the replicas cache file: "
           + replicaFile.getPath(), e );
       return false;
     }

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

@@ -1292,7 +1292,7 @@ public class FsVolumeImpl implements FsVolumeSpi {
     try {
       fileNames = IOUtils.listDirectory(dir, BlockDirFilter.INSTANCE);
     } catch (IOException ioe) {
-      LOG.warn("Exception occured while compiling report: ", ioe);
+      LOG.warn("Exception occurred while compiling report: ", ioe);
       // Initiate a check on disk failure.
       dataset.datanode.checkDiskErrorAsync();
       // Ignore this directory and proceed.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/command/QueryCommand.java

@@ -97,7 +97,7 @@ public class QueryCommand extends Command {
     String header = "Query Plan queries a given data node about the " +
         "current state of disk balancer execution.\n\n";
 
-    String footer = "\nQuery command retrievs the plan ID and the current " +
+    String footer = "\nQuery command retrieves the plan ID and the current " +
         "running state. ";
 
     HelpFormatter helpFormatter = new HelpFormatter();

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

@@ -134,7 +134,7 @@ final class FSDirTruncateOp {
       if (!onBlockBoundary) {
         // Open file for write, but don't log into edits
         long lastBlockDelta = file.computeFileSize() - newLength;
-        assert lastBlockDelta > 0 : "delta is 0 only if on block bounday";
+        assert lastBlockDelta > 0 : "delta is 0 only if on block boundary";
         truncateBlock = prepareFileForTruncate(fsn, iip, clientName,
             clientMachine, lastBlockDelta, null);
       }

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

@@ -1082,7 +1082,7 @@ public class FSEditLogLoader {
       boolean removed = FSDirWriteFileOp.unprotectedRemoveBlock(
           fsDir, path, iip, file, oldBlock);
       if (!removed && !(op instanceof UpdateBlocksOp)) {
-        throw new IOException("Trying to delete non-existant block " + oldBlock);
+        throw new IOException("Trying to delete non-existent block " + oldBlock);
       }
     } else if (newBlocks.length > oldBlocks.length) {
       final boolean isStriped = ecPolicy != null;

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

@@ -1025,7 +1025,7 @@ public class NNStorage extends Storage implements Closeable,
     
     if (!blockpoolID.equals("") && !blockpoolID.equals(bpid)) {
       throw new InconsistentFSStateException(storage,
-          "Unexepcted blockpoolID " + bpid + " . Expected " + blockpoolID);
+          "Unexpected blockpoolID " + bpid + " . Expected " + blockpoolID);
     }
     setBlockPoolID(bpid);
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java

@@ -219,7 +219,7 @@ public class NamenodeWebHdfsMethods {
       final String remoteAddr) throws IOException {
     FSNamesystem fsn = namenode.getNamesystem();
     if (fsn == null) {
-      throw new IOException("Namesystem has not been intialized yet.");
+      throw new IOException("Namesystem has not been initialized yet.");
     }
     final BlockManager bm = fsn.getBlockManager();