When i tried to test this https://github.com/elastic/spring-petclinic. when i run this command ./mvnw spring-boot:run. i got this error

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project spring-petclinic: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

It turned out that i haven’t install maven , the simple fix is

yum install maven