Revert "HBASE-15497 Incorrect javadoc for atomicity guarantee of Increment and Append"

Wrong author information
This reverts commit 6e3ffd03e7.

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

@@ -34,9 +34,10 @@ import org.apache.hadoop.hbase.util.Bytes;
 /**
  * Performs Append operations on a single row.
  * <p>
- * This operation ensures atomicty to readers. Appends are done
+ * Note that this operation does not appear atomic to readers. Appends are done
- * under a single row lock, so write operations to a row are synchronized, and
+ * under a single row lock, so write operations to a row are synchronized, but
- * readers are guaranteed to see this operation fully completed.
+ * readers do not take row locks so get and scan operations can see this
+ * operation partially completed.
  * <p>
  * To append to a set of columns of a row, instantiate an Append object with the
  * row to append to. At least one column to append must be specified using the

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

@@ -38,9 +38,10 @@ import org.apache.hadoop.hbase.util.ClassSize;
 /**
  * Used to perform Increment operations on a single row.
  * <p>
- * This operation ensures atomicity to readers. Increments are done
+ * This operation does not appear atomic to readers.  Increments are done
- * under a single row lock, so write operations to a row are synchronized, and
+ * under a single row lock, so write operations to a row are synchronized, but
- * readers are guaranteed to see this operation fully completed.
+ * readers do not take row locks so get and scan operations can see this
+ * operation partially completed.
  * <p>
  * To increment columns of a row, instantiate an Increment object with the row
  * to increment.  At least one column to increment must be specified using the

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

@@ -326,9 +326,10 @@ public interface Table extends Closeable {
   /**
    * Appends values to one or more columns within a single row.
    * <p>
-   * This operation guaranteed atomicity to readers. Appends are done
+   * This operation does not appear atomic to readers.  Appends are done
-   * under a single row lock, so write operations to a row are synchronized, and
+   * under a single row lock, so write operations to a row are synchronized, but
-   * readers are guaranteed to see this operation fully completed.
+   * readers do not take row locks so get and scan operations can see this
+   * operation partially completed.
    *
    * @param append object that specifies the columns and amounts to be used
    *                  for the increment operations
@@ -340,9 +341,10 @@ public interface Table extends Closeable {
   /**
    * Increments one or more columns within a single row.
    * <p>
-   * This operation ensures atomicity to readers. Increments are done
+   * This operation does not appear atomic to readers.  Increments are done
-   * under a single row lock, so write operations to a row are synchronized, and
+   * under a single row lock, so write operations to a row are synchronized, but
-   * readers are guaranteed to see this operation fully completed.
+   * readers do not take row locks so get and scan operations can see this
+   * operation partially completed.
    *
    * @param increment object that specifies the columns and amounts to be used
    *                  for the increment operations