Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/core/metrics/Applicationstartup
at org.spring framework.boot.SpringApplication. <init> (SpringApplication.java: 227) at org.springframework.boot.SpringApplication.<init> (SpringApplication.java: 240) at org.springframework.boot.SpringApplication.run (SpringApplication.java:1301)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) at com.testDemoproject.covidDemoassignmentsts.CovidDemoAssignmentStsApplication.main(CovidDemoAssignment StsAp
Caused by: java.lang.ClassNotFoundException: org.springframework.core.metrics. ApplicationStartup at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass (BuiltinClassLoader.java:606)
at java.base/jdk.internal.loader.ClassLoaders $AppClassLoader.loadClass (ClassLoaders.java:168)
>Solution :
Try to sync your dependency by pom file.