Does spring initialize beans in parallel?

Question

I have a lot of independent spring beans in my project (classes annotated with @Component -- NOT lazily initialized). I wanted to know weather the beans will be initialized serially or parallely? I am asking this because the beans modify a common data structure on initialization and I wanted to know weather the data structure should be made thread-safe.

Spring version used:- 4.2

I was reading open issues on spring jira website:-

According to https://jira.spring.io/browse/SPR-9887 it seems to be parallely initialized

But according to https://jira.spring.io/browse/SPR-8767 it seems to be serially initialized.

Answer 1

Spring initialises beans in serial. There is nothing that says that they are initialised in parallel. In fact, the ticket that you cite (https://jira.spring.io/browse/SPR-9887) is a closed ticket because it's a duplicate of https://jira.spring.io/browse/SPR-8767. This ticket is unresolved and targetted for the release of spring 5.0 in the future, so nothing says that beans are initialised in parallel!