keycloak-aplcache

diff --git a/federation/ldap/src/main/java/org/keycloak/federation/ldap/LDAPFederationProvider.java b/federation/ldap/src/main/java/org/keycloak/federation/ldap/LDAPFederationProvider.java
index 4ddd142..d95abdb 100755
--- a/federation/ldap/src/main/java/org/keycloak/federation/ldap/LDAPFederationProvider.java
+++ b/federation/ldap/src/main/java/org/keycloak/federation/ldap/LDAPFederationProvider.java
@@ -229,7 +229,9 @@ public class LDAPFederationProvider implements UserFederationProvider {
         List<UserModel> result = new ArrayList<>();
         for (String username : usernames) {
             UserModel kcUser = session.users().getUserByUsername(username, realm);
-            if (!model.getId().equals(kcUser.getFederationLink())) {
+            if (kcUser == null) {
+                logger.warnf("User '%s' referenced by membership wasn't found in LDAP", username);
+            } else if (!model.getId().equals(kcUser.getFederationLink())) {
                 logger.warnf("Incorrect federation provider of user %s" + kcUser.getUsername());
             } else {
                 result.add(kcUser);

diff --git a/federation/ldap/src/main/java/org/keycloak/federation/ldap/mappers/membership/group/GroupLDAPFederationMapper.java b/federation/ldap/src/main/java/org/keycloak/federation/ldap/mappers/membership/group/GroupLDAPFederationMapper.java
index cd220b2..8713de7 100644
--- a/federation/ldap/src/main/java/org/keycloak/federation/ldap/mappers/membership/group/GroupLDAPFederationMapper.java
+++ b/federation/ldap/src/main/java/org/keycloak/federation/ldap/mappers/membership/group/GroupLDAPFederationMapper.java
@@ -27,7 +27,6 @@ import java.util.Map;
 import java.util.Set;
 
 import org.jboss.logging.Logger;
-import org.keycloak.federation.ldap.LDAPConfig;
 import org.keycloak.federation.ldap.LDAPFederationProvider;
 import org.keycloak.federation.ldap.LDAPUtils;
 import org.keycloak.federation.ldap.idm.model.LDAPDn;
@@ -42,11 +41,9 @@ import org.keycloak.federation.ldap.mappers.membership.LDAPGroupMapperMode;
 import org.keycloak.federation.ldap.mappers.membership.MembershipType;
 import org.keycloak.federation.ldap.mappers.membership.UserRolesRetrieveStrategy;
 import org.keycloak.models.GroupModel;
-import org.keycloak.models.LDAPConstants;
 import org.keycloak.models.ModelException;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.UserFederationMapperModel;
-import org.keycloak.models.UserFederationProviderModel;
 import org.keycloak.models.UserFederationSyncResult;
 import org.keycloak.models.UserModel;
 import org.keycloak.models.utils.KeycloakModelUtils;

diff --git a/services/src/main/java/org/keycloak/services/resources/admin/ClientRoleMappingsResource.java b/services/src/main/java/org/keycloak/services/resources/admin/ClientRoleMappingsResource.java
index 45f51c3..7307d81 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/ClientRoleMappingsResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/ClientRoleMappingsResource.java
@@ -20,11 +20,14 @@ import org.jboss.resteasy.annotations.cache.NoCache;
 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.ModelException;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.RoleMapperModel;
 import org.keycloak.models.RoleModel;
 import org.keycloak.models.utils.ModelToRepresentation;
 import org.keycloak.representations.idm.RoleRepresentation;
+import org.keycloak.services.ErrorResponseException;
 import org.keycloak.services.ServicesLogger;
 
 import javax.ws.rs.Consumes;
@@ -34,11 +37,14 @@ import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriInfo;
 
+import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Properties;
 import java.util.Set;
 
 /**
@@ -48,6 +54,7 @@ import java.util.Set;
 public class ClientRoleMappingsResource {
     protected static final ServicesLogger logger = ServicesLogger.ROOT_LOGGER;
 
+    protected KeycloakSession session;
     protected RealmModel realm;
     protected RealmAuth auth;
     protected RoleMapperModel user;
@@ -55,8 +62,9 @@ public class ClientRoleMappingsResource {
     protected AdminEventBuilder adminEvent;
     private UriInfo uriInfo;
 
-    public ClientRoleMappingsResource(UriInfo uriInfo, RealmModel realm, RealmAuth auth, RoleMapperModel user, ClientModel client, AdminEventBuilder adminEvent) {
+    public ClientRoleMappingsResource(UriInfo uriInfo, KeycloakSession session, RealmModel realm, RealmAuth auth, RoleMapperModel user, ClientModel client, AdminEventBuilder adminEvent) {
         this.uriInfo = uriInfo;
+        this.session = session;
         this.realm = realm;
         this.auth = auth;
         this.user = user;
@@ -182,7 +190,14 @@ public class ClientRoleMappingsResource {
                 if (roleModel == null || !roleModel.getId().equals(role.getId())) {
                     throw new NotFoundException("Role not found");
                 }
-                user.deleteRoleMapping(roleModel);
+
+                try {
+                    user.deleteRoleMapping(roleModel);
+                } catch (ModelException me) {
+                    Properties messages = AdminRoot.getMessages(session, realm, auth.getAuth().getToken().getLocale());
+                    throw new ErrorResponseException(me.getMessage(), MessageFormat.format(messages.getProperty(me.getMessage(), me.getMessage()), me.getParameters()),
+                            Response.Status.BAD_REQUEST);
+                }
             }
         }
         adminEvent.operation(OperationType.DELETE).resourcePath(uriInfo).representation(roles).success();

diff --git a/services/src/main/java/org/keycloak/services/resources/admin/RoleMapperResource.java b/services/src/main/java/org/keycloak/services/resources/admin/RoleMapperResource.java
index b324b5c..5bd67d1 100644
--- a/services/src/main/java/org/keycloak/services/resources/admin/RoleMapperResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/RoleMapperResource.java
@@ -22,6 +22,7 @@ import org.keycloak.common.ClientConnection;
 import org.keycloak.events.admin.OperationType;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
+import org.keycloak.models.ModelException;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.RoleMapperModel;
 import org.keycloak.models.RoleModel;
@@ -29,6 +30,7 @@ import org.keycloak.models.utils.ModelToRepresentation;
 import org.keycloak.representations.idm.ClientMappingsRepresentation;
 import org.keycloak.representations.idm.MappingsRepresentation;
 import org.keycloak.representations.idm.RoleRepresentation;
+import org.keycloak.services.ErrorResponseException;
 import org.keycloak.services.ServicesLogger;
 import org.keycloak.services.managers.RealmManager;
 
@@ -42,11 +44,15 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.HttpHeaders;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriInfo;
+
+import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Properties;
 import java.util.Set;
 
 /**
@@ -238,7 +244,14 @@ public class RoleMapperResource {
                 if (roleModel == null || !roleModel.getId().equals(role.getId())) {
                     throw new NotFoundException("Role not found");
                 }
-                roleMapper.deleteRoleMapping(roleModel);
+
+                try {
+                    roleMapper.deleteRoleMapping(roleModel);
+                } catch (ModelException me) {
+                    Properties messages = AdminRoot.getMessages(session, realm, auth.getAuth().getToken().getLocale());
+                    throw new ErrorResponseException(me.getMessage(), MessageFormat.format(messages.getProperty(me.getMessage(), me.getMessage()), me.getParameters()),
+                            Response.Status.BAD_REQUEST);
+                }
 
                 adminEvent.operation(OperationType.DELETE).resourcePath(uriInfo, role.getId()).representation(roles).success();
             }
@@ -253,7 +266,7 @@ public class RoleMapperResource {
             throw new NotFoundException("Client not found");
         }
 
-        return new ClientRoleMappingsResource(uriInfo, realm, auth, roleMapper, clientModel, adminEvent);
+        return new ClientRoleMappingsResource(uriInfo, session, realm, auth, roleMapper, clientModel, adminEvent);
 
     }
 }

diff --git a/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java b/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
index 9b03535..ad7feec 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
@@ -939,7 +939,14 @@ public class UsersResource {
         if (group == null) {
             throw new NotFoundException("Group not found");
         }
-        if (user.isMemberOf(group)) user.leaveGroup(group);
+
+        try {
+            if (user.isMemberOf(group)) user.leaveGroup(group);
+        } catch (ModelException me) {
+            Properties messages = AdminRoot.getMessages(session, realm, auth.getAuth().getToken().getLocale());
+            throw new ErrorResponseException(me.getMessage(), MessageFormat.format(messages.getProperty(me.getMessage(), me.getMessage()), me.getParameters()),
+                    Response.Status.BAD_REQUEST);
+        }
     }
 
     @PUT

diff --git a/testsuite/integration/src/test/java/org/keycloak/testsuite/federation/ldap/base/LDAPGroupMapperTest.java b/testsuite/integration/src/test/java/org/keycloak/testsuite/federation/ldap/base/LDAPGroupMapperTest.java
index 45afc47..89abefc 100644
--- a/testsuite/integration/src/test/java/org/keycloak/testsuite/federation/ldap/base/LDAPGroupMapperTest.java
+++ b/testsuite/integration/src/test/java/org/keycloak/testsuite/federation/ldap/base/LDAPGroupMapperTest.java
@@ -31,6 +31,7 @@ import org.junit.runners.MethodSorters;
 import org.keycloak.federation.ldap.LDAPFederationProvider;
 import org.keycloak.federation.ldap.LDAPFederationProviderFactory;
 import org.keycloak.federation.ldap.LDAPUtils;
+import org.keycloak.federation.ldap.idm.model.LDAPDn;
 import org.keycloak.federation.ldap.idm.model.LDAPObject;
 import org.keycloak.federation.ldap.mappers.membership.LDAPGroupMapperMode;
 import org.keycloak.federation.ldap.mappers.membership.MembershipType;
@@ -300,6 +301,47 @@ public class LDAPGroupMapperTest {
         }
     }
 
+
+    // KEYCLOAK-2682
+    @Test
+    public void test04_groupReferencingNonExistentMember() {
+        KeycloakSession session = keycloakRule.startSession();
+        try {
+            RealmModel appRealm = session.realms().getRealmByName("test");
+
+            UserFederationMapperModel mapperModel = appRealm.getUserFederationMapperByName(ldapModel.getId(), "groupsMapper");
+            FederationTestUtils.updateGroupMapperConfigOptions(mapperModel, GroupMapperConfig.MODE, LDAPGroupMapperMode.LDAP_ONLY.toString());
+            appRealm.updateUserFederationMapper(mapperModel);
+
+            // 1 - Add some group to LDAP for testing
+            LDAPFederationProvider ldapProvider = FederationTestUtils.getLdapProvider(session, ldapModel);
+            GroupLDAPFederationMapper groupMapper = FederationTestUtils.getGroupMapper(mapperModel, ldapProvider, appRealm);
+            LDAPObject group2 = FederationTestUtils.createLDAPGroup(session, appRealm, ldapModel, "group2", descriptionAttrName, "group2 - description");
+
+            // 2 - Add one existing user rob to LDAP group
+            LDAPObject robLdap = ldapProvider.loadLDAPUserByUsername(appRealm, "robkeycloak");
+            LDAPUtils.addMember(ldapProvider, MembershipType.DN, LDAPConstants.MEMBER, group2, robLdap, false);
+
+            // 3 - Add non-existing user to LDAP group
+            LDAPDn nonExistentDn = LDAPDn.fromString(ldapProvider.getLdapIdentityStore().getConfig().getUsersDn());
+            nonExistentDn.addFirst(robLdap.getRdnAttributeName(), "nonexistent");
+            LDAPObject nonExistentLdapUser = new LDAPObject();
+            nonExistentLdapUser.setDn(nonExistentDn);
+            LDAPUtils.addMember(ldapProvider, MembershipType.DN, LDAPConstants.MEMBER, group2, nonExistentLdapUser, true);
+
+            // 4 - Check group members. Just existing user rob should be present
+            groupMapper.syncDataFromFederationProviderToKeycloak();
+            GroupModel kcGroup2 = KeycloakModelUtils.findGroupByPath(appRealm, "/group2");
+            List<UserModel> groupUsers = session.users().getGroupMembers(appRealm, kcGroup2, 0, 5);
+            Assert.assertEquals(1, groupUsers.size());
+            UserModel rob = groupUsers.get(0);
+            Assert.assertEquals("robkeycloak", rob.getUsername());
+
+        } finally {
+            keycloakRule.stopSession(session, false);
+        }
+    }
+
     private void deleteGroupMappingsInLDAP(GroupLDAPFederationMapper groupMapper, LDAPObject ldapUser, String groupName) {
         LDAPObject ldapGroup = groupMapper.loadLDAPGroupByName(groupName);
         groupMapper.deleteGroupMappingInLDAP(ldapUser, ldapGroup);

diff --git a/themes/src/main/resources/theme/base/admin/resources/js/controllers/users.js b/themes/src/main/resources/theme/base/admin/resources/js/controllers/users.js
index 4ca5bf8..33a5d2b 100755
--- a/themes/src/main/resources/theme/base/admin/resources/js/controllers/users.js
+++ b/themes/src/main/resources/theme/base/admin/resources/js/controllers/users.js
@@ -59,6 +59,12 @@ module.controller('UserRoleMappingCtrl', function($scope, $http, realm, user, cl
                     $scope.selectedClientMappings = [];
                 }
                 Notifications.success("Role mappings updated.");
+            }).error(function(response) {
+                if (response && response['error_description']) {
+                    Notifications.error(response['error_description']);
+                } else {
+                    Notifications.error("Failed to remove role mapping");
+                }
             });
     };
 
@@ -87,6 +93,12 @@ module.controller('UserRoleMappingCtrl', function($scope, $http, realm, user, cl
                 $scope.realmComposite = CompositeRealmRoleMapping.query({realm : realm.realm, userId : user.id});
                 $scope.realmRoles = AvailableRealmRoleMapping.query({realm : realm.realm, userId : user.id});
                 Notifications.success("Role mappings updated.");
+            }).error(function(response) {
+                if (response && response['error_description']) {
+                    Notifications.error(response['error_description']);
+                } else {
+                    Notifications.error("Failed to remove role mapping");
+                }
             });
     };
 
@@ -1170,6 +1182,12 @@ module.controller('UserGroupMembershipCtrl', function($scope, $route, realm, gro
         UserGroupMapping.remove({realm: realm.realm, userId: user.id, groupId: $scope.selectedGroup.id}, function() {
             Notifications.success('Removed group membership');
             $route.reload();
+        }, function(response) {
+            if (response.data && response.data['error_description']) {
+                Notifications.error(response.data['error_description']);
+            } else {
+                Notifications.error("Failed to leave group");
+            }
         });
 
     };