handle exceptions spring oauth

spring-security-oauth/src/main/java/org/baeldung/web/RedditController.java

@@ -1,5 +1,7 @@
 package org.baeldung.web;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.security.oauth2.client.OAuth2RestTemplate;
 import org.springframework.security.oauth2.client.resource.UserApprovalRequiredException;
 import org.springframework.security.oauth2.client.resource.UserRedirectRequiredException;
@@ -12,9 +14,10 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 
 @Controller
 public class RedditController {
-
     private OAuth2RestTemplate redditRestTemplate;
 
+    private final Logger LOGGER = LoggerFactory.getLogger(getClass());
+
     @RequestMapping("/info")
     public String getInfo(Model model) {
         try {
@@ -27,6 +30,7 @@ public class RedditController {
         } catch (UserRedirectRequiredException e) {
             throw e;
         } catch (Exception e) {
+            LOGGER.error("Error occurred", e);
             model.addAttribute("error", e.getLocalizedMessage());
         }
         return "reddit";

spring-security-oauth/src/main/webapp/WEB-INF/jsp/reddit.jsp

@@ -10,7 +10,11 @@
         <h1>Your Reddit Info</h1>
         <b>Your reddit username is </b>${info}
     </c:when>
-    <c:otherwise> Sorry, error occurred.</c:otherwise>
+    <c:otherwise> 
+        <b>Sorry, error occurred</b> 
+        <br><br>
+        <div>${error}</div>
+    </c:otherwise>
 </c:choose>
 </body>
 </html>