Polish

See gh-12906

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/SessionProperties.java

@@ -65,8 +65,7 @@ public class SessionProperties {
 	@PostConstruct
 	public void checkSessionTimeout() {
 		if (this.timeout == null && this.serverProperties != null) {
-			Session session = this.serverProperties.getServlet().getSession();
+			this.timeout = this.serverProperties.getServlet().getSession().getTimeout();
-			this.timeout = (session == null ? null : session.getTimeout());
 		}
 	}
 
@@ -87,6 +86,10 @@ public class SessionProperties {
 		return this.timeout;
 	}
 
+	public void setTimeout(Duration timeout) {
+		this.timeout = timeout;
+	}
+
 	public Servlet getServlet() {
 		return this.servlet;
 	}
@@ -95,10 +98,6 @@ public class SessionProperties {
 		this.servlet = servlet;
 	}
 
-	public void setTimeout(Duration timeout) {
-		this.timeout = timeout;
-	}
-
 	/**
 	 * Servlet-related properties.
 	 */

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -6015,7 +6015,8 @@ the name of the table for the JDBC store, as shown in the following example:
 ----
 
 For setting the timeout of the session you can use the `spring.session.timeout` property.
-If that property is not set, the auto-configuration will fallback to the value of `server.servlet.session.timeout`.
+If that property is not set, the auto-configuration fallbacks to the value of
+`server.servlet.session.timeout`.
 
 [[boot-features-jmx]]
 == Monitoring and Management over JMX