Topic

Runtime upgrades

The practice of moving production workloads onto new versions of a language runtime, including the default-behaviour changes that arrive with them.

Current clusters

build1 publisher

Upgrading to JDK 27 switches TLS 1.3 handshakes to hybrid post-quantum key exchange

Oracle's JDK 27 release notes put hybrid post-quantum key exchange for TLS 1.3 into the default configuration. The migration now belongs to whoever schedules the runtime upgrade.

Publishers:inside.java

Reality

Evidence55
Adoption12
Hype gap+22
Incentives80
Confidence55