diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 90053fcb60..7fc3b5b098 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -838,6 +838,8 @@ Release 2.6.0 - UNRELEASED
 
     HADOOP-11109. Site build is broken. (Jian He via atm)
 
+    HADOOP-10946. Fix a bunch of typos in log messages (Ray Chiang via aw)
+
 Release 2.5.1 - 2014-09-05
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/VersionMismatchException.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/VersionMismatchException.java
index a72be58832..015c15e8a6 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/VersionMismatchException.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/VersionMismatchException.java
@@ -41,7 +41,7 @@ public VersionMismatchException(byte expectedVersionIn, byte foundVersionIn){
   /** Returns a string representation of this object. */
   @Override
   public String toString(){
-    return "A record version mismatch occured. Expecting v"
+    return "A record version mismatch occurred. Expecting v"
       + expectedVersion + ", found v" + foundVersion; 
   }
 }
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsDynamicMBeanBase.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsDynamicMBeanBase.java
index 57014d5781..9c9164eaf4 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsDynamicMBeanBase.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsDynamicMBeanBase.java
@@ -160,7 +160,7 @@ else if (attributeName.endsWith(MIN_TIME))
       else if (attributeName.endsWith(MAX_TIME))
         return or.getMaxTime();
       else {
-        MetricsUtil.LOG.error("Unexpected attrubute suffix");
+        MetricsUtil.LOG.error("Unexpected attribute suffix");
         throw new AttributeNotFoundException();
       }
     } else {
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DiskChecker.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DiskChecker.java
index f2ee446b4a..6b27ae5397 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DiskChecker.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DiskChecker.java
@@ -102,7 +102,7 @@ public static void checkDirs(File dir) throws DiskErrorException {
    */
   public static void checkDir(File dir) throws DiskErrorException {
     if (!mkdirsWithExistsCheck(dir)) {
-      throw new DiskErrorException("Can not create directory: "
+      throw new DiskErrorException("Cannot create directory: "
                                    + dir.toString());
     }
     checkDirAccess(dir);
diff --git a/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java b/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
index 577711f4ce..dae957ee30 100644
--- a/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
+++ b/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
@@ -1095,7 +1095,7 @@ public boolean rename(Path src, Path dst) throws IOException {
       if (dstKey.startsWith(srcKey + PATH_DELIMITER)) {
 
         if (LOG.isDebugEnabled()) {
-          LOG.debug("Renaming directory to a itself is disallowed. src=" + src
+          LOG.debug("Renaming directory to itself is disallowed. src=" + src
               + " dest=" + dst);
         }
         return false;
diff --git a/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/Gridmix.java b/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/Gridmix.java
index 4620cfc5a2..8ac590bfb6 100644
--- a/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/Gridmix.java
+++ b/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/Gridmix.java
@@ -681,7 +681,7 @@ public void run() {
           } catch (IOException e) {
             LOG.warn("Failure killing " + job.getJobName(), e);
           } catch (Exception e) {
-            LOG.error("Unexcpected exception", e);
+            LOG.error("Unexpected exception", e);
           }
         }
         LOG.info("Done.");
diff --git a/hadoop-tools/hadoop-streaming/src/main/java/org/apache/hadoop/streaming/StreamJob.java b/hadoop-tools/hadoop-streaming/src/main/java/org/apache/hadoop/streaming/StreamJob.java
index c64c0b63b0..7ff5641bf8 100644
--- a/hadoop-tools/hadoop-streaming/src/main/java/org/apache/hadoop/streaming/StreamJob.java
+++ b/hadoop-tools/hadoop-streaming/src/main/java/org/apache/hadoop/streaming/StreamJob.java
@@ -1016,7 +1016,7 @@ public int submitAndMonitorJob() throws IOException {
       if (background_) {
         LOG.info("Job is running in background.");
       } else if (!jc_.monitorAndPrintJob(jobConf_, running_)) {
-        LOG.error("Job not Successful!");
+        LOG.error("Job not successful!");
         return 1;
       }
       LOG.info("Output directory: " + output_);