diff -r a65826af2aa4 -r 701d0765f75f jdk/src/share/classes/javax/sql/rowset/serial/SerialStruct.java
--- a/jdk/src/share/classes/javax/sql/rowset/serial/SerialStruct.java	Thu Dec 13 08:11:38 2012 +0800
+++ b/jdk/src/share/classes/javax/sql/rowset/serial/SerialStruct.java	Wed Dec 12 20:57:45 2012 -0500
@@ -50,6 +50,13 @@
  * an instance from a <code>Struct</code> object, a method for retrieving
  * the SQL type name of the SQL structured type in the database, and methods
  * for retrieving its attribute values.
+ *
+ * <h4> Thread safety </h4>
+ *
+ * A SerialStruct is not safe for use by multiple concurrent threads.  If a
+ * SerialStruct is to be used by more than one thread then access to the
+ * SerialStruct should be controlled by appropriate synchronization.
+ *
  */
 public class SerialStruct implements Struct, Serializable, Cloneable {