diff --git a/core/src/main/java/fr/abes/item/core/constant/Constant.java b/core/src/main/java/fr/abes/item/core/constant/Constant.java
index 842fa375..a54ba81c 100644
--- a/core/src/main/java/fr/abes/item/core/constant/Constant.java
+++ b/core/src/main/java/fr/abes/item/core/constant/Constant.java
@@ -228,7 +228,7 @@ public class Constant implements Serializable {
 	public static final String ENTER_CREATION_DEMANDE_BY_USERNUM = "entree dans autoriserCreationDemandeParUserNum..........";
 	public static final String ENTER_AUTORISER_MAJ_UTILISATEUR_BY_USERNUM = "entree dans autoriserMajUtilisateurParUserNum..........";
 	public static final String ENTER_AUTHENTICATE = "entree dans authenticate...";
-	public static final String ERROR_SUDOC_WS_AUTHENTICATION = "rejet du service web d'authentification Sudoc = ";
+	public static final String ERROR_SUDOC_WS_AUTHENTICATION = "rejet du service web d'authentification Sudoc";
 	public static final String ERROR_AUTHENTICATION_IN_SECURITY_CONTEXT = "Could not set user authentication in security context";
 	public static final String ERROR_BLOCKED_IP = "dans isblocked IP, attemptsCache.get(key) = ";
 	public static final String NUMBER_IP_TENTATIVES = "NB de tentatives pour ip =";
diff --git a/web/src/main/java/fr/abes/item/exception/RestResponseEntityExceptionHandler.java b/web/src/main/java/fr/abes/item/exception/RestResponseEntityExceptionHandler.java
index 28644f87..08dc692e 100644
--- a/web/src/main/java/fr/abes/item/exception/RestResponseEntityExceptionHandler.java
+++ b/web/src/main/java/fr/abes/item/exception/RestResponseEntityExceptionHandler.java
@@ -45,6 +45,9 @@ public ResponseEntity<?> handleMiscFailures(Throwable t) {
 	@ExceptionHandler({StorageFileNotFoundException.class})
 	public ResponseEntity<?> handleStorageFileNotFound(Throwable t) { return errorResponse(t, HttpStatus.NOT_FOUND);}
 
+	@ExceptionHandler({WsAuthException.class})
+	public ResponseEntity<?> handleWsAuthException(Throwable t) { return errorResponse(t, HttpStatus.BAD_GATEWAY);}
+
 	protected ResponseEntity<ExceptionMessage> errorResponse(Throwable throwable, HttpStatus status) {
 		if (null != throwable) {
 			log.error(Constant.ERROR_CAUGHT + throwable.getMessage());
diff --git a/web/src/main/java/fr/abes/item/exception/WsAuthException.java b/web/src/main/java/fr/abes/item/exception/WsAuthException.java
new file mode 100644
index 00000000..63c247ed
--- /dev/null
+++ b/web/src/main/java/fr/abes/item/exception/WsAuthException.java
@@ -0,0 +1,7 @@
+package fr.abes.item.exception;
+
+public class WsAuthException extends RuntimeException {
+    public WsAuthException(String message) {
+        super(message);
+    }
+}
diff --git a/web/src/main/java/fr/abes/item/security/CustomAuthenticationManager.java b/web/src/main/java/fr/abes/item/security/CustomAuthenticationManager.java
index 1eaf153c..18e74b98 100644
--- a/web/src/main/java/fr/abes/item/security/CustomAuthenticationManager.java
+++ b/web/src/main/java/fr/abes/item/security/CustomAuthenticationManager.java
@@ -2,6 +2,7 @@
 
 import fr.abes.item.core.constant.Constant;
 import fr.abes.item.core.service.UtilisateurService;
+import fr.abes.item.exception.WsAuthException;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.dao.EmptyResultDataAccessException;
@@ -19,7 +20,6 @@
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.stereotype.Component;
-import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
 import java.nio.charset.StandardCharsets;
@@ -53,7 +53,7 @@ public Authentication authenticate(Authentication authentication)
         String name = authentication.getName();
         String password = authentication.getCredentials().toString();
 
-        User u = this.estAuthentifie(name, password);
+        User u = this.callWsAuth(name, password);
 
         if (u != null) {
 
@@ -78,8 +78,7 @@ public Authentication authenticate(Authentication authentication)
     }
 
 
-    private User estAuthentifie(String userKey, String password) {
-
+    private User callWsAuth(String userKey, String password) {
         try {
             RestTemplate restTemplate = new RestTemplate();
             String requestJson = "{\n" +
@@ -94,9 +93,9 @@ private User estAuthentifie(String userKey, String password) {
             HttpEntity<String> entity = new HttpEntity<>(requestJson, headers);
             return restTemplate.postForObject(this.urlWsAuthSudoc, entity, User.class);
         }
-        catch (HttpClientErrorException e) {
-            log.info(Constant.ERROR_SUDOC_WS_AUTHENTICATION + e);
-            return null;
+        catch (Exception e) {
+            log.error(Constant.ERROR_SUDOC_WS_AUTHENTICATION + e);
+            throw new WsAuthException(e.getMessage());
         }
     }
     public String getEmail(Integer userNum) {