diff -r a65826af2aa4 -r 701d0765f75f jdk/src/share/classes/javax/sql/rowset/serial/SerialDatalink.java
--- a/jdk/src/share/classes/javax/sql/rowset/serial/SerialDatalink.java	Thu Dec 13 08:11:38 2012 +0800
+++ b/jdk/src/share/classes/javax/sql/rowset/serial/SerialDatalink.java	Wed Dec 12 20:57:45 2012 -0500
@@ -42,6 +42,12 @@
  * <pre>
  *      java.net.URL url = rowset.getURL(1);
  * </pre>
+ *
+ * <h4> Thread safety </h4>
+ *
+ * A SerialDatalink is not safe for use by multiple concurrent threads.  If a
+ * SerialDatalink is to be used by more than one thread then access to the
+ * SerialDatalink should be controlled by appropriate synchronization.
  */
 public class SerialDatalink implements Serializable, Cloneable {