update gradle to 7.6

[gelpenaddict]

What version of gRPC-Java are you using?

v1.51.1

What is your environment?

MacOS 13.1
JDK 19

What did you expect to see?

successful execution of ./gradlew installDist

What did you see instead?

java.lang.illegalargumentexception: unsupported class file major version 63

Steps to reproduce the bug

./gradlew installDist

The solution was to update gradle distrubtionUrl's to:

distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip

JDK19 support was added in Gradle 7.6: https://docs.gradle.org/7.6/release-notes.html

[ejona86]

I actually was already working on a change to upgrade (I was waiting for #9790 and hadn't sent it out yet).

Would you mind sharing why you were building grpc-java and with JDK 19? Were you just wanting to run our tests against JDK 19?

[gelpenaddict]

I got a new machine so I was installing Java and picked the latest. 19 has been out for a few months already so was surprised it wasn't updated here. I was just doing the tutorial to learn it, not sure what tests you're referring to. I'm also not a Gradle expert so not sure if changing that distributionUrl is the proper way to update it.

[ejona86]

I was just doing the tutorial to learn it

Oh, you were probably in the examples/ directory. Yeah, it would be good to get that working on newer JDK versions pretty soon.

[gelpenaddict]

Thx for updating. The quickstart page's git clone command still pulls the old Gradle version. How do we pull the update?

[ejona86]

@gelpenaddict, it will do so until we bump the version for the next release.