others-how to solve 'Could not resolve all files for configuration' problem ?

Problem

When we run a spring boot with gradle application, sometimes, we get this error or warning message:

Execution failed for task ':app9:compileJava'.
> Could not resolve all files for configuration ':app9:compileClasspath'.
   > Could not find org.springframework.boot:spring-boot-starter-jpa:.
     Required by:
         project :app9

Possible solution:
 - Declare repository providing the artifact, see the documentation at https://docs.gradle.org/current/userguide/declaring_repositories.html

The core error is :

Could not resolve all files for configuration xxx
Could not find org.springframework.boot:spring-boot-starter-jpa

Why does this error happen?

Environment

• jdk 8
• gradle 6.x

Our build.gradle is as follows:

dependencies {
	  ...
    implementation 'org.springframework.boot:spring-boot-starter-jpa'
    ...
}

Reason

Please pay attention to the dependency org.springframework.boot:spring-boot-starter-jpa, it does not exist!!!

Let’s check all the starters :

Name	Description
spring-boot-starter	Core starter, including auto-configuration support, logging and YAML
spring-boot-starter-activemq	Starter for JMS messaging using Apache ActiveMQ
spring-boot-starter-amqp	Starter for using Spring AMQP and Rabbit MQ
spring-boot-starter-aop	Starter for aspect-oriented programming with Spring AOP and AspectJ
spring-boot-starter-artemis	Starter for JMS messaging using Apache Artemis
spring-boot-starter-batch	Starter for using Spring Batch
spring-boot-starter-cache	Starter for using Spring Framework’s caching support
spring-boot-starter-data-cassandra	Starter for using Cassandra distributed database and Spring Data Cassandra
spring-boot-starter-data-cassandra-reactive	Starter for using Cassandra distributed database and Spring Data Cassandra Reactive
spring-boot-starter-data-couchbase	Starter for using Couchbase document-oriented database and Spring Data Couchbase
spring-boot-starter-data-couchbase-reactive	Starter for using Couchbase document-oriented database and Spring Data Couchbase Reactive
spring-boot-starter-data-elasticsearch	Starter for using Elasticsearch search and analytics engine and Spring Data Elasticsearch
spring-boot-starter-data-jdbc	Starter for using Spring Data JDBC
spring-boot-starter-data-jpa	Starter for using Spring Data JPA with Hibernate
spring-boot-starter-data-ldap	Starter for using Spring Data LDAP
spring-boot-starter-data-mongodb	Starter for using MongoDB document-oriented database and Spring Data MongoDB
spring-boot-starter-data-mongodb-reactive	Starter for using MongoDB document-oriented database and Spring Data MongoDB Reactive
spring-boot-starter-data-neo4j	Starter for using Neo4j graph database and Spring Data Neo4j
spring-boot-starter-data-r2dbc	Starter for using Spring Data R2DBC
spring-boot-starter-data-redis	Starter for using Redis key-value data store with Spring Data Redis and the Lettuce client
spring-boot-starter-data-redis-reactive	Starter for using Redis key-value data store with Spring Data Redis reactive and the Lettuce client
spring-boot-starter-data-rest	Starter for exposing Spring Data repositories over REST using Spring Data REST
spring-boot-starter-data-solr	Starter for using the Apache Solr search platform with Spring Data Solr. Deprecated since 2.3.9
spring-boot-starter-freemarker	Starter for building MVC web applications using FreeMarker views
spring-boot-starter-groovy-templates	Starter for building MVC web applications using Groovy Templates views
spring-boot-starter-hateoas	Starter for building hypermedia-based RESTful web application with Spring MVC and Spring HATEOAS
spring-boot-starter-integration	Starter for using Spring Integration
spring-boot-starter-jdbc	Starter for using JDBC with the HikariCP connection pool
spring-boot-starter-jersey	Starter for building RESTful web applications using JAX-RS and Jersey. An alternative to spring-boot-starter-web
spring-boot-starter-jooq	Starter for using jOOQ to access SQL databases. An alternative to spring-boot-starter-data-jpa or spring-boot-starter-jdbc
spring-boot-starter-json	Starter for reading and writing json
spring-boot-starter-jta-atomikos	Starter for JTA transactions using Atomikos
spring-boot-starter-jta-bitronix	Starter for JTA transactions using Bitronix. Deprecated since 2.3.0
spring-boot-starter-mail	Starter for using Java Mail and Spring Framework’s email sending support
spring-boot-starter-mustache	Starter for building web applications using Mustache views
spring-boot-starter-oauth2-client	Starter for using Spring Security’s OAuth2/OpenID Connect client features
spring-boot-starter-oauth2-resource-server	Starter for using Spring Security’s OAuth2 resource server features
spring-boot-starter-quartz	Starter for using the Quartz scheduler
spring-boot-starter-rsocket	Starter for building RSocket clients and servers
spring-boot-starter-security	Starter for using Spring Security
spring-boot-starter-test	Starter for testing Spring Boot applications with libraries including JUnit Jupiter, Hamcrest and Mockito
spring-boot-starter-thymeleaf	Starter for building MVC web applications using Thymeleaf views
spring-boot-starter-validation	Starter for using Java Bean Validation with Hibernate Validator
spring-boot-starter-web	Starter for building web, including RESTful, applications using Spring MVC. Uses Tomcat as the default embedded container
spring-boot-starter-web-services	Starter for using Spring Web Services
spring-boot-starter-webflux	Starter for building WebFlux applications using Spring Framework’s Reactive Web support
spring-boot-starter-websocket	Starter for building WebSocket applications using Spring Framework’s WebSocket support

Solution

We should change the name of the starter , change from org.springframework.boot:spring-boot-starter-jpa to org.springframework.boot:spring-boot-starter-data-jpa :

Change your build.gradle:

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
}

Run the app again, the error messages disappear.

It works!