diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/OracleApplicationDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/OracleApplicationDAOImpl.java
index f0c94badb9e..b9de2a1ac36 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/OracleApplicationDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/OracleApplicationDAOImpl.java
@@ -80,7 +80,7 @@ public class OracleApplicationDAOImpl extends GenericApplicationDAOImpl {
                 + "FROM AP_APP "
                 + "INNER JOIN AP_APP_RELEASE ON "
                 + "AP_APP.ID = AP_APP_RELEASE.AP_APP_ID "
-                + "INNER JOIN (SELECT ID FROM AP_APP OFFSET ? ROWS FETCH NEXT ? ROWS ONLY) AS app_data ON app_data.ID = AP_APP.ID "
+                + "INNER JOIN (SELECT ID FROM AP_APP ORDER BY ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY) AS app_data ON app_data.ID = AP_APP.ID "
                 + "WHERE AP_APP.TENANT_ID = ?";
 
         if (filter == null) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/SQLServerApplicationDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/SQLServerApplicationDAOImpl.java
index 6ed7ca72cea..3b247d886aa 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/SQLServerApplicationDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/SQLServerApplicationDAOImpl.java
@@ -79,7 +79,7 @@ public class SQLServerApplicationDAOImpl extends GenericApplicationDAOImpl {
                 + "FROM AP_APP "
                 + "INNER JOIN AP_APP_RELEASE ON "
                 + "AP_APP.ID = AP_APP_RELEASE.AP_APP_ID "
-                + "INNER JOIN (SELECT ID FROM AP_APP OFFSET ? ROWS FETCH NEXT ? ROWS ONLY) AS app_data ON app_data.ID = AP_APP.ID "
+                + "INNER JOIN (SELECT ID FROM AP_APP ORDER BY ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY) AS app_data ON app_data.ID = AP_APP.ID "
                 + "WHERE AP_APP.TENANT_ID = ?";
 
         if (filter == null) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/OracleReviewDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/OracleReviewDAOImpl.java
index f24aac96ca4..7abec2ecc88 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/OracleReviewDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/OracleReviewDAOImpl.java
@@ -63,7 +63,7 @@ public class OracleReviewDAOImpl extends GenericReviewDAOImpl {
                 + "WHERE AP_APP_REVIEW.AP_APP_RELEASE_ID = ? AND "
                 + "AP_APP_REVIEW.ROOT_PARENT_ID = ? AND "
                 + "AP_APP_REVIEW.TENANT_ID = ? "
-                + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
         try {
             Connection conn = this.getDBConnection();
             try (PreparedStatement statement = conn.prepareStatement(sql)) {
@@ -114,7 +114,7 @@ public class OracleReviewDAOImpl extends GenericReviewDAOImpl {
                     ") AND AP_APP_REVIEW.ROOT_PARENT_ID = ? AND "
                             + "AP_APP_REVIEW.ACTIVE_REVIEW = true AND "
                             + "AP_APP_REVIEW.TENANT_ID = ? "
-                            + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
+                            + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
             releaseIds.stream().map(ignored -> "?").forEach(joiner::add);
             String query = joiner.toString();
             try (PreparedStatement ps = conn.prepareStatement(query)) {
@@ -169,7 +169,7 @@ public class OracleReviewDAOImpl extends GenericReviewDAOImpl {
                             + "AP_APP_REVIEW.ACTIVE_REVIEW = true AND "
                             + "AP_APP_REVIEW.USERNAME = ? AND "
                             + "AP_APP_REVIEW.TENANT_ID = ? "
-                            + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
+                            + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
             releaseIds.stream().map(ignored -> "?").forEach(joiner::add);
             String query = joiner.toString();
             try (PreparedStatement ps = conn.prepareStatement(query)) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/SQLServerReviewDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/SQLServerReviewDAOImpl.java
index ccad696597b..4949e7f23a7 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/SQLServerReviewDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/review/SQLServerReviewDAOImpl.java
@@ -63,7 +63,7 @@ public class SQLServerReviewDAOImpl extends GenericReviewDAOImpl {
                 + "WHERE AP_APP_REVIEW.AP_APP_RELEASE_ID = ? AND "
                 + "AP_APP_REVIEW.ROOT_PARENT_ID = ? AND "
                 + "AP_APP_REVIEW.TENANT_ID = ? "
-                + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
         try {
             Connection conn = this.getDBConnection();
             try (PreparedStatement statement = conn.prepareStatement(sql)) {
@@ -114,7 +114,7 @@ public class SQLServerReviewDAOImpl extends GenericReviewDAOImpl {
                     ") AND AP_APP_REVIEW.ROOT_PARENT_ID = ? AND "
                             + "AP_APP_REVIEW.ACTIVE_REVIEW = true AND "
                             + "AP_APP_REVIEW.TENANT_ID = ? "
-                            + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
+                            + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
             releaseIds.stream().map(ignored -> "?").forEach(joiner::add);
             String query = joiner.toString();
             try (PreparedStatement ps = conn.prepareStatement(query)) {
@@ -169,7 +169,7 @@ public class SQLServerReviewDAOImpl extends GenericReviewDAOImpl {
                             + "AP_APP_REVIEW.ACTIVE_REVIEW = true AND "
                             + "AP_APP_REVIEW.USERNAME = ? AND "
                             + "AP_APP_REVIEW.TENANT_ID = ? "
-                            + "OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
+                            + "ORDER BY AP_APP_REVIEW.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY");
             releaseIds.stream().map(ignored -> "?").forEach(joiner::add);
             String query = joiner.toString();
             try (PreparedStatement ps = conn.prepareStatement(query)) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java
index 3ecb017ba70..234cbc847f9 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java
@@ -953,8 +953,8 @@ public class GenericSubscriptionDAOImpl extends AbstractDAOImpl implements Subsc
             Connection conn = this.getDBConnection();
             List<String> subscribedRoles = new ArrayList<>();
             String sql = "SELECT "
-                         + "US.ROLE_NAME AS ROLE "
-                         + "FROM AP_ROLE_SUBSCRIPTION US "
+                         + "RS.ROLE_NAME AS ROLE "
+                         + "FROM AP_ROLE_SUBSCRIPTION RS "
                          + "WHERE "
                          + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? LIMIT ? OFFSET ?";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/OracleSubscriptionDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/OracleSubscriptionDAOImpl.java
index 439fdbf1177..b7932d9f9c8 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/OracleSubscriptionDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/OracleSubscriptionDAOImpl.java
@@ -51,7 +51,7 @@ public class OracleSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
                     + "US.USER_NAME AS USER "
                     + "FROM AP_USER_SUBSCRIPTION US "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY US.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement stmt = conn.prepareStatement(sql)) {
                 stmt.setInt(1, appReleaseId);
                 stmt.setInt(2, tenantId);
@@ -88,10 +88,10 @@ public class OracleSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
             Connection conn = this.getDBConnection();
             List<String> subscribedRoles = new ArrayList<>();
             String sql = "SELECT "
-                    + "US.ROLE_NAME AS ROLE "
-                    + "FROM AP_ROLE_SUBSCRIPTION US "
+                    + "RS.ROLE_NAME AS ROLE "
+                    + "FROM AP_ROLE_SUBSCRIPTION RS "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY RS.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
                 ps.setInt(1, appReleaseId);
                 ps.setInt(2, tenantId);
@@ -131,7 +131,7 @@ public class OracleSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
                     + "GS.GROUP_NAME AS GROUPS "
                     + "FROM AP_GROUP_SUBSCRIPTION GS "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY GS.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
                 ps.setInt(1, appReleaseId);
                 ps.setInt(2, tenantId);
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/SQLServerSubscriptionDAOImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/SQLServerSubscriptionDAOImpl.java
index b3a93749e64..ea4ff20962b 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/SQLServerSubscriptionDAOImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/subscription/SQLServerSubscriptionDAOImpl.java
@@ -51,7 +51,7 @@ public class SQLServerSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
                     + "US.USER_NAME AS USER "
                     + "FROM AP_USER_SUBSCRIPTION US "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY US.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement stmt = conn.prepareStatement(sql)) {
                 stmt.setInt(1, appReleaseId);
                 stmt.setInt(2, tenantId);
@@ -88,10 +88,10 @@ public class SQLServerSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
             Connection conn = this.getDBConnection();
             List<String> subscribedRoles = new ArrayList<>();
             String sql = "SELECT "
-                    + "US.ROLE_NAME AS ROLE "
-                    + "FROM AP_ROLE_SUBSCRIPTION US "
+                    + "RS.ROLE_NAME AS ROLE "
+                    + "FROM AP_ROLE_SUBSCRIPTION RS "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY RS.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
                 ps.setInt(1, appReleaseId);
                 ps.setInt(2, tenantId);
@@ -131,7 +131,7 @@ public class SQLServerSubscriptionDAOImpl extends GenericSubscriptionDAOImpl {
                     + "GS.GROUP_NAME AS GROUPS "
                     + "FROM AP_GROUP_SUBSCRIPTION GS "
                     + "WHERE "
-                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
+                    + "AP_APP_RELEASE_ID = ? AND TENANT_ID = ? ORDER BY GS.ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY";
             try (PreparedStatement ps = conn.prepareStatement(sql)) {
                 ps.setInt(1, appReleaseId);
                 ps.setInt(2, tenantId);
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementPublisherAPI.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementPublisherAPI.java
index 3905acd94f2..f157e98cba9 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementPublisherAPI.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementPublisherAPI.java
@@ -1275,7 +1275,7 @@ public interface ApplicationManagementPublisherAPI {
     );
 
     @PUT
-    @Path("/tags/{oldTagName}")
+    @Path("/tags/rename")
     @Produces(MediaType.APPLICATION_JSON)
     @ApiOperation(
             consumes = MediaType.APPLICATION_JSON,
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/admin/ApplicationManagementPublisherAdminAPI.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/admin/ApplicationManagementPublisherAdminAPI.java
index 18af2d8030e..8b3a1117f38 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/admin/ApplicationManagementPublisherAdminAPI.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/admin/ApplicationManagementPublisherAdminAPI.java
@@ -229,12 +229,12 @@ public interface ApplicationManagementPublisherAdminAPI {
     );
 
     @PUT
-    @Path("/tags/{tagName}")
+    @Path("/categories/rename")
     @Produces(MediaType.APPLICATION_JSON)
     @ApiOperation(
             consumes = MediaType.APPLICATION_JSON,
             produces = MediaType.APPLICATION_JSON,
-            httpMethod = "GET",
+            httpMethod = "PUT",
             value = "Update application category",
             notes = "This will update application category.",
             tags = "Application Management",
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
index 163ddc84a13..499b59815b9 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
@@ -48,7 +48,6 @@ import org.wso2.carbon.device.application.mgt.common.exception.ApplicationManage
 import org.wso2.carbon.device.application.mgt.common.services.ApplicationManager;
 import org.wso2.carbon.device.application.mgt.core.exception.NotFoundException;
 
-import java.beans.Customizer;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -748,7 +747,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
 
     @DELETE
     @Override
-    @Consumes("application/json")
+    @Consumes(MediaType.WILDCARD)
     @Path("/{appId}/tags/{tagName}")
     public Response deleteApplicationTag(
             @PathParam("appId") int appId,
@@ -775,7 +774,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
 
     @DELETE
     @Override
-    @Consumes("application/json")
+    @Consumes(MediaType.WILDCARD)
     @Path("/tags/{tagName}")
     public Response deleteUnusedTag(
             @PathParam("tagName") String tagName) {
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
index 62229b50247..000816cba81 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
@@ -35,6 +35,7 @@ import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
+import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.util.List;
 
@@ -48,6 +49,7 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
     private static Log log = LogFactory.getLog(ApplicationManagementPublisherAdminAPIImpl.class);
 
         @DELETE
+        @Consumes(MediaType.WILDCARD)
         @Path("/release/{uuid}")
         public Response deleteApplicationRelease(
                 @PathParam("uuid") String releaseUuid) {
@@ -75,6 +77,7 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
         }
 
     @DELETE
+    @Consumes(MediaType.WILDCARD)
     @Path("/{appId}")
     public Response deleteApplication(
             @PathParam("appId") int applicationId) {
@@ -101,7 +104,7 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
 
     @DELETE
     @Override
-    @Consumes("application/json")
+    @Consumes(MediaType.WILDCARD)
     @Path("/tags/{tagName}")
     public Response deleteTag(
             @PathParam("tagName") String tagName) {
@@ -167,7 +170,7 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
 
     @DELETE
     @Override
-    @Consumes("application/json")
+    @Consumes(MediaType.WILDCARD)
     @Path("/categories/{categoryName}")
     public Response deleteCategory(
             @PathParam("categoryName") String categoryName) {
diff --git a/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/InvokerHandler.java b/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/InvokerHandler.java
index 1ec7b0e51ac..0ef489c9ba4 100644
--- a/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/InvokerHandler.java
+++ b/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/InvokerHandler.java
@@ -70,10 +70,9 @@ import java.util.List;
 public class InvokerHandler extends HttpServlet {
     private static final Log log = LogFactory.getLog(InvokerHandler.class);
     private static final long serialVersionUID = -6508020875358160165L;
-    private AuthData authData;
-    private String apiEndpoint;
-    private String serverUrl;
-    private String platform;
+    private static AuthData authData;
+    private static String serverUrl;
+    private static String platform;
 
     @Override
     protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
@@ -229,7 +228,7 @@ public class InvokerHandler extends HttpServlet {
      */
     private String generateBackendRequestURL(HttpServletRequest req) {
         StringBuilder urlBuilder = new StringBuilder();
-        urlBuilder.append(serverUrl).append(HandlerConstants.API_COMMON_CONTEXT).append(apiEndpoint);
+        urlBuilder.append(serverUrl).append(HandlerConstants.API_COMMON_CONTEXT).append(req.getPathInfo());
         if (StringUtils.isNotEmpty(req.getQueryString())) {
             urlBuilder.append("?").append(req.getQueryString());
         }
@@ -269,10 +268,9 @@ public class InvokerHandler extends HttpServlet {
      * @return If request is a valid one, returns TRUE, otherwise return FALSE
      * @throws IOException If and error occurs while witting error response to client side
      */
-    private boolean validateRequest(HttpServletRequest req, HttpServletResponse resp)
+    private static boolean validateRequest(HttpServletRequest req, HttpServletResponse resp)
             throws IOException {
         serverUrl = req.getScheme() + "://" + req.getServerName() + ":" + System.getProperty("iot.gateway.https.port");
-        apiEndpoint = req.getPathInfo();
         HttpSession session = req.getSession(false);
 
         if (session == null) {
@@ -289,8 +287,8 @@ public class InvokerHandler extends HttpServlet {
             return false;
         }
 
-        if (apiEndpoint == null || req.getMethod() == null) {
-            log.error("Bad Request, Either destination api-endpoint or method is empty");
+        if (req.getMethod() == null) {
+            log.error("Bad Request, Request method is empty");
             handleError(req, resp, HttpStatus.SC_BAD_REQUEST);
             return false;
         }
@@ -322,13 +320,14 @@ public class InvokerHandler extends HttpServlet {
     }
 
     /***
+     * This method is responsible to get the refresh token
      *
      * @param req {@link HttpServletRequest}
      * @param resp {@link HttpServletResponse}
      * @return If successfully renew tokens, returns TRUE otherwise return FALSE
      * @throws IOException If an error occurs while witting error response to client side or invoke token renewal API
      */
-    private boolean refreshToken(HttpServletRequest req, HttpServletResponse resp)
+    private static boolean refreshToken(HttpServletRequest req, HttpServletResponse resp)
             throws IOException {
         if (log.isDebugEnabled()) {
             log.debug("refreshing the token");
@@ -391,7 +390,7 @@ public class InvokerHandler extends HttpServlet {
      * @param errorCode HTTP error status code
      * @throws IOException If error occurred when trying to send the error response.
      */
-    private void handleError(HttpServletRequest req, HttpServletResponse resp, int errorCode)
+    private static void handleError(HttpServletRequest req, HttpServletResponse resp, int errorCode)
             throws IOException {
         ProxyResponse proxyResponse = new ProxyResponse();
         proxyResponse.setCode(errorCode);
diff --git a/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/UserHandler.java b/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/UserHandler.java
index 5268160689b..81041d9e9cc 100644
--- a/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/UserHandler.java
+++ b/components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/UserHandler.java
@@ -115,6 +115,7 @@ public class UserHandler extends HttpServlet {
 
     /**
      * Send UnAuthorized Response to the user
+     * 
      * @param req HttpServletRequest object
      * @param resp HttpServletResponse object
      * @param serverUrl Url of the server
@@ -124,6 +125,8 @@ public class UserHandler extends HttpServlet {
             throws IOException {
         ProxyResponse proxyResponse = new ProxyResponse();
         proxyResponse.setCode(HttpStatus.SC_UNAUTHORIZED);
+        proxyResponse.setExecutorResponse(
+                HandlerConstants.EXECUTOR_EXCEPTION_PREFIX + HandlerUtil.getStatusKey(HttpStatus.SC_UNAUTHORIZED));
         HandlerUtil.handleError(req, resp, serverUrl, platform, proxyResponse);
     }
 }