[FIXED] Having "APPLICATION FAILED TO START" error on Spring Boot startup

Issue

I'm developing an API on Spring Boot using Vault and Mongo, but it refuses to start.

2022-09-07 13:58:56.510  WARN 23885 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.vault.config.VaultReactiveBootstrapConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'spring.cloud.vault-org.springframework.cloud.vault.config.VaultProperties': Could not bind properties to 'VaultProperties' : prefix=spring.cloud.vault, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is javax.validation.NoProviderFoundException: Unable to create a Configuration, because no Jakarta Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
2022-09-07 13:58:56.513  INFO 23885 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-09-07 13:58:56.521 ERROR 23885 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The Bean Validation API is on the classpath but no implementation could be found

Action:

Add an implementation, such as Hibernate Validator, to the classpath

EDIT: I think the problem is that Spring Boot tries to use javax and jakarta at the same time according to this part of the error: nested exception is javax.validation.NoProviderFoundException: Unable to create a Configuration, because no Jakarta Bean Validation provider could be found.. Is this a normal behavior?

Solution

Adding hibernate-validator 6 and spring-boot-starter-validation solved the problem. Thing to know: hibernate-validator < 7 uses Javax, hibernate-validator => 7 uses Jakarta.

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.2.4.Final</version>
        </dependency>

Answered By - benji62f
Answer Checked By - Candace Johnson (JavaFixing Volunteer)