What does it mean when Java Buildpack release notes mentioned "This release contains dependency updates as well as an improvement to the detection criteria for installing java-cfenv"

Products

• VMware Tanzu Application Service

Issue/Introduction

Java Buildpack Release Notes for v4.67 mentions the statement below:

This release contains dependency updates as well as an improvement to the detection criteria for installing java-cfenv. This will now only install if there is a Spring-Boot-Version manifest entry with a version > 3.

This article discuss more on what these mean.

Resolution

The java-cfenv library is supplied by the Java Buildpack, Once an application is deployed you can see if the java-cfenv library is being installed if you can see log that looks like:

-----> Downloading Java Cf Env 3.1.5 from https://java-buildpack.cloudfoundry.org/java-cfenv/java-cfenv-3.1.5.jar (found in cache)

Beginning version 4.67.0 the java-cfenv will only be installed if it meets the 2 criteria:

• the META-INF/MANIFEST.MF  contains Spring-Boot-Version:   > 3.0.0
• jar(s) of the form *spring-boot-x.jar > 3.0.0 are found within the app