SPRING BOOT UPGRADE CAUSES ISSUE WHILE STARTING UP

Question

I'm trying to upgrade spring boot version to 2.6.6 from 2.2.x, I got

ClassNotFoundException: org.springframework.core.metrics.ApplicationStartup.

The pom.xml below:

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.6</version>
        <relativePath/>
</parent>

< Exception in thread "main" java.lang.NoClassDefFoundError: > > org/springframework/core/metrics/ApplicationStartup at org.springframework.boot.SpringApplication.(SpringApplication.java:228) at org.springframework.boot.SpringApplication.(SpringApplication.java:241) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) at com.sams.clubops.receiptcheck.transactionaudit.AuditApplication.main(AuditApplication.java:19) Caused by: java.lang.ClassNotFoundException: org.springframework.core.metrics.ApplicationStartup at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 5 more

I don't know if there any conflict with this version. I wanna get some help, thanks.

Answer 1

With the version changed if you use SpringToolSuite4, forcing the Update Maven Project should work: Project > Update Maven Project > Force Update of Snapshots/Releases