Topic

Reactive I/O and virtual threads

Concurrency models on the JVM: non-blocking event-loop I/O and the lightweight threads introduced by Project Loom, along with the problem of propagating context across both.

Current clusters

build1 publisher

Quarkus 4 rebuilds its I/O core on Vert.x 5.1.2 and Netty 4.2 for a November GA

Beta 1 arrives in September with breaking changes frozen, leaving about two months of testing before general availability, and Quarkus 3.40 LTS has community maintenance until September 2027 for teams that need longer.

Publishers:dev.to

Reality

Evidence55
Adoption20
Hype gap+15
Incentives45
Confidence55