keycloak-uncached

diff --git a/model/jpa/src/main/java/org/keycloak/models/jpa/ClientAdapter.java b/model/jpa/src/main/java/org/keycloak/models/jpa/ClientAdapter.java
index a7dc0f4..6cb24f8 100755
--- a/model/jpa/src/main/java/org/keycloak/models/jpa/ClientAdapter.java
+++ b/model/jpa/src/main/java/org/keycloak/models/jpa/ClientAdapter.java
@@ -3,6 +3,7 @@ package org.keycloak.models.jpa;
 import org.keycloak.connections.jpa.util.JpaUtils;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
+import org.keycloak.models.ModelDuplicateException;
 import org.keycloak.models.ProtocolMapperModel;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.RoleContainerModel;
@@ -328,7 +329,7 @@ public class ClientAdapter implements ClientModel {
     @Override
     public ProtocolMapperModel addProtocolMapper(ProtocolMapperModel model) {
         if (getProtocolMapperByName(model.getProtocol(), model.getName()) != null) {
-            throw new RuntimeException("protocol mapper name must be unique per protocol");
+            throw new ModelDuplicateException("Protocol mapper name must be unique per protocol");
         }
         String id = model.getId() != null ? model.getId() : KeycloakModelUtils.generateId();
         ProtocolMapperEntity entity = new ProtocolMapperEntity();

diff --git a/model/mongo/src/main/java/org/keycloak/models/mongo/keycloak/adapters/ClientAdapter.java b/model/mongo/src/main/java/org/keycloak/models/mongo/keycloak/adapters/ClientAdapter.java
index 8eb562f..fc1f13d 100755
--- a/model/mongo/src/main/java/org/keycloak/models/mongo/keycloak/adapters/ClientAdapter.java
+++ b/model/mongo/src/main/java/org/keycloak/models/mongo/keycloak/adapters/ClientAdapter.java
@@ -5,6 +5,7 @@ import com.mongodb.QueryBuilder;
 import org.keycloak.connections.mongo.api.context.MongoStoreInvocationContext;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
+import org.keycloak.models.ModelDuplicateException;
 import org.keycloak.models.ProtocolMapperModel;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.RoleModel;
@@ -342,7 +343,7 @@ public class ClientAdapter extends AbstractMongoAdapter<MongoClientEntity> imple
     @Override
     public ProtocolMapperModel addProtocolMapper(ProtocolMapperModel model) {
         if (getProtocolMapperByName(model.getProtocol(), model.getName()) != null) {
-            throw new RuntimeException("protocol mapper name must be unique per protocol");
+            throw new ModelDuplicateException("Protocol mapper name must be unique per protocol");
         }
         ProtocolMapperEntity entity = new ProtocolMapperEntity();
         String id = model.getId() != null ? model.getId() : KeycloakModelUtils.generateId();

diff --git a/services/src/main/java/org/keycloak/services/resources/admin/ProtocolMappersResource.java b/services/src/main/java/org/keycloak/services/resources/admin/ProtocolMappersResource.java
index 306d350..f53d256 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/ProtocolMappersResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/ProtocolMappersResource.java
@@ -6,10 +6,12 @@ import org.jboss.resteasy.spi.NotFoundException;
 import org.keycloak.events.admin.OperationType;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
+import org.keycloak.models.ModelDuplicateException;
 import org.keycloak.models.ProtocolMapperModel;
 import org.keycloak.models.utils.ModelToRepresentation;
 import org.keycloak.models.utils.RepresentationToModel;
 import org.keycloak.representations.idm.ProtocolMapperRepresentation;
+import org.keycloak.services.ErrorResponse;
 
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
@@ -86,9 +88,17 @@ public class ProtocolMappersResource {
     @Consumes(MediaType.APPLICATION_JSON)
     public Response createMapper(ProtocolMapperRepresentation rep) {
         auth.requireManage();
-        ProtocolMapperModel model = RepresentationToModel.toModel(rep);
-        model = client.addProtocolMapper(model);
-        adminEvent.operation(OperationType.CREATE).resourcePath(uriInfo, model.getId()).representation(rep).success();
+
+        ProtocolMapperModel model = null;
+        try {
+            model = RepresentationToModel.toModel(rep);
+            model = client.addProtocolMapper(model);
+            adminEvent.operation(OperationType.CREATE).resourcePath(uriInfo, model.getId()).representation(rep).success();
+
+        } catch (ModelDuplicateException e) {
+            return ErrorResponse.exists("Protocol mapper exists with same name");
+        }
+
         return Response.created(uriInfo.getAbsolutePathBuilder().path(model.getId()).build()).build();
     }
     /**