Anded return statment after onFailure for the object dont send onSucces.

voter-registry/src/main/java/meerkat/registry/AsyncRegistryCallbacks/GetGroupsCallback.java

@@ -42,6 +42,7 @@ public class GetGroupsCallback implements FutureCallback<List<BulletinBoardMessa
     public void onSuccess(List<BulletinBoardMessage> messages) {
         if (messages.isEmpty()){
             callback.onFailure(new NotFoundException("Voter permissions not found in database"));
+            return;
         }
 
         BulletinBoardMessage message = getLatestMessage(messages);

voter-registry/src/main/java/meerkat/registry/AsyncRegistryCallbacks/HasVotedCallback.java

@@ -22,6 +22,7 @@ public class HasVotedCallback implements FutureCallback<List<BulletinBoardMessag
     public void onSuccess(List<BulletinBoardMessage> messages) {
         if (messages.isEmpty()){
             callback.onSuccess(false);
+            return;
         }
         callback.onSuccess(true);
     }

voter-registry/src/main/java/meerkat/registry/AsyncRegistryCallbacks/getVoterCallback.java

@@ -27,6 +27,7 @@ public class GetVoterCallback implements FutureCallback<List<BulletinBoardMessag
     public void onSuccess(List<BulletinBoardMessage> messages) {
         if(messages.isEmpty()){
             callback.onFailure(new NotFoundException("Voter info not found in database."));
+            return;
         }
         BulletinBoardMessage latestMessage = getLatestMessage(messages);