Are you using JDK 9 as the boot JDK or doing bootcycle build? I file a bug to track this: https://bugs.openjdk.java.net/browse/JDK-8176469
This warning is emitted when running javac with the patch module path that overrides jdk.compiler, jdk.rmic and a few other modules but jdk.rmic is not in the resolved modules required by jdk.compiler. Mandy > On Mar 9, 2017, at 11:44 AM, Dan Smith <daniel.sm...@oracle.com> wrote: > > During a build, many of these warnings get spit out: > > WARNING: Unknown module: jdk.rmic specified in --patch-module > > I've been assuming someone would clean this up eventually, but it's been > there for months. Don't see a JBS bug. Is this on someone's radar? > > Or maybe this is somehow a weird quirk of my setup? > > —Dan