Please answer these questions before submitting your issue.

What version of gRPC are you using?

1.7.0

What JVM are you using (java -version)?

java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

What did you do?

If possible, provide a recipe for reproducing the error.

followed instructions here:
https://grpc.io/docs/quickstart/java.html

What did you expect to see?

step 1 to succeed

What did you see instead?

PS C:\Users\patrick\hack\grpc-java\examples> ./gradlew installDist

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine java version from '9.0.1'.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Upgrading to gradle 4.2.1 fixes this issue.