CDI can't set @Singleton into @Provider in @Requestscoped REST service after redeploy on WildFly

Question

I have AuthenticationFilter and it injects UserController which is annotated with @Singleton. When I deploy my application for the first time - everything is all right, but when I redeploy application and then I try to get something from whichever REST service - often I receive:

Can not set app.auth.UserController field
 app.web.rest.auth.AuthenticationFilter.userController to 
app.auth.UserController$Proxy$_$$_Weld$EnterpriseProxy$

The problem still occurs even if I kill server and restart it. But after couple of restarts issue finally disappears.

Someone knows what could cause that error?

1. Which application server ? 2. If you stop the application server, is it really stopped ? Is there an infinite loop or something that might just keep running even after an attemp is made for the application server to shut down ? To me, this seems like a problem with stopping the Singleton. Can you show us the code of your Singleton ? Also, is it EJB @Singleton, or java inejct Singleton ? — , Jun 21 '17 at 08:59

score 0 · Answer 1 · answered Aug 09 '17 at 16:35

I had experienced this problem too. With each deployment I would get random fails of injecting (EJB) @Singleton and even (CDI) ApplicationScoped. The problem in my case was that I did not have beans.xml. Somehow without the beans.xml the project did not initialize properly.

When I added (a completely empty) beans.xml it was resolved. Hope it helps.

CDI can't set @Singleton into @Provider in @Requestscoped REST service after redeploy on WildFly

1 Answers1