When a thread is blocked, it means it cannot continue its execution. This issue can occur for various reasons, such as synchronization problems, resource contention, deadlock situations, or even a known bug in Quarkus. Additionally, there might be a blocking API call somewhere in your OrderReleaseDto.builder().build() method or elsewhere.

I came across this article from Vert.x about a golden rule, maybe it will help. It also mentions that you can turn off those warnings or adjust the settings. See also this discussion from GitHub.

You mentioned that it works in IntelliJ (local environment) possibly because it has more CPU cores and experiences less contention than your Cloud Run service.