Polish script templating documentation

spring-webmvc/src/main/java/org/springframework/web/servlet/view/script/ScriptTemplateConfigurer.java

@@ -26,10 +26,8 @@ import javax.script.ScriptEngine;
  * <pre class="code">
  *
  * // Add the following to an &#64;Configuration class
- *
  * &#64;Bean
  * public ScriptTemplateConfigurer mustacheConfigurer() {
- *
  *    ScriptTemplateConfigurer configurer = new ScriptTemplateConfigurer();
  *    configurer.setEngineName("nashorn");
  *    configurer.setScripts("mustache.js");
@@ -39,9 +37,9 @@ import javax.script.ScriptEngine;
  * }
  * </pre>
  *
- * <p><b>NOTE:</b> It is possible to use non thread-safe script engines and
- * templating libraries, like Handlebars or React running on Nashorn, by setting
- * the {@link #setSharedEngine sharedEngine} property to {@code false}.
+ * <p><b>NOTE:</b> It is possible to use non thread-safe script engines with
+ * templating libraries not designed for concurrency, like Handlebars or React running on
+ * Nashorn, by setting the {@link #setSharedEngine sharedEngine} property to {@code false}.
  *
  * @author Sebastien Deleuze
  * @since 4.2
@@ -102,8 +100,10 @@ public class ScriptTemplateConfigurer implements ScriptTemplateConfig {
 	/**
 	 * When set to {@code false}, use thread-local {@link ScriptEngine} instances instead
 	 * of one single shared instance. This flag should be set to {@code false} for those
-	 * using non thread-safe script engines and templating libraries, like Handlebars or
-	 * React running on Nashorn for example.
+	 * using non thread-safe script engines with templating libraries not designed for
+	 * concurrency, like Handlebars or React running on Nashorn for example.
+	 * In this case, Java 8u60 or greater is required due to
+	 * <a href="https://bugs.openjdk.java.net/browse/JDK-8076099">this bug</a>.
 	 * <p>When this flag is set to {@code false}, the script engine must be specified using
 	 * {@link #setEngineName(String)}. Using {@link #setEngine(ScriptEngine)} is not
 	 * possible because multiple instances of the script engine need to be created lazily

spring-webmvc/src/main/resources/org/springframework/web/servlet/config/spring-mvc-4.2.xsd

@@ -1265,7 +1265,9 @@
 					<xsd:documentation><![CDATA[
 	When set to false, use thread-local ScriptEngine instances instead of one single shared
 	instance. This flag should be set to false for those using non thread-safe script engines
-	and templating libraries, like Handlebars or React running on Nashorn for example.
+	with templating libraries not designed for concurrency, like Handlebars or React
+	running on Nashorn for example. In this case, Java 8u60 or greater is required due to
+	this bug: https://bugs.openjdk.java.net/browse/JDK-8076099.
 					]]></xsd:documentation>
 				</xsd:annotation>
 			</xsd:attribute>

src/asciidoc/web-view.adoc

@@ -1489,7 +1489,8 @@ It has been tested with:
 To be able to use script templates integration, you need to have available in your classpath
 the script engine:
 
-* http://openjdk.java.net/projects/nashorn/[Nashorn] Javascript engine is provided builtin with Java 8+
+* http://openjdk.java.net/projects/nashorn/[Nashorn] Javascript engine is provided builtin with Java 8+.
+   Using the latest update release available is highly recommended.
 * http://docs.oracle.com/javase/7/docs/technotes/guides/scripting/programmer_guide/#jsengine[Rhino]
    Javascript engine is provided builtin with Java 6 and Java 7.
    Please notice that using Rhino is not recommended since it does not
@@ -1617,11 +1618,20 @@ browser facilities not available in the server-side script engine.
 			configurer.setEngineName("nashorn");
 			configurer.setScripts("polyfill.js", "handlebars.js", "render.js");
 			configurer.setRenderFunction("render");
+			configurer.setSharedEngine(false);
 			return configurer;
 		}
 	}
 ----
 
+[NOTE]
+====
+Setting the `sharedEngine` property to `false` is required when using non thread-safe
+script engines with templating libraries not designed for concurrency, like Handlebars or
+React running on Nashorn for example. In that case, Java 8u60 or greater is required due
+to https://bugs.openjdk.java.net/browse/JDK-8076099[this bug].
+====
+
 `polyfill.js` only defines the `window` object needed by Handlebars to run properly:
 
 [source,javascript,indent=0]