今回は、IntelliJでSpringBootのプロジェクトを作成したときに起きた、
バージョン不整合によるプラグインエラーをメモしたいと思います。
内容は、以下のIntelliJのチュートリアルを参考に、
最小構成のSpringBootのWebプロジェクトを作成して起動してみようとしたところ、
Gradleのところでエラーが出ていて、ビルドが行えないトラブルとなります。
https://pleiades.io/help/idea/your-first-spring-application.html
目次
エラー内容
まずは、発生したエラー内容についてです。
ビルドしようとしたら、以下のエラーが発生しました。
A problem occurred configuring root project 'demo1'.
> Could not resolve all files for configuration ':classpath'.
> Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.0.2.
Required by:
project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.0.2
> No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.0.2 was found. The consumer was configured to find a runtime of a library compatible with Java 11, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '7.6' but:
- Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'javadocElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a component, and its dependencies declared externally:
- Incompatible because this component declares documentation and the consumer needed a library
- Other compatible attributes:
- Doesn't say anything about its target Java version (required compatibility with Java 11)
- Doesn't say anything about its elements (required them packaged as a jar)
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'mavenOptionalApiElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.2 declares a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'mavenOptionalRuntimeElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.2 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'runtimeElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'sourcesElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a component, and its dependencies declared externally:
- Incompatible because this component declares documentation and the consumer needed a library
- Other compatible attributes:
- Doesn't say anything about its target Java version (required compatibility with Java 11)
- Doesn't say anything about its elements (required them packaged as a jar)
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
* Exception is:
org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'demo1'.
at org.gradle.configuration.project.LifecycleProjectEvaluator.wrapException(LifecycleProjectEvaluator.java:84)
at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:77)
at org.gradle.configuration.project.LifecycleProjectEvaluator.access$400(LifecycleProjectEvaluator.java:55)
at org.gradle.configuration.project.LifecycleProjectEvaluator$EvaluateProject.lambda$run$0(LifecycleProjectEvaluator.java:111)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
省略
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:49)
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.0.2.
Required by:
project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.0.2
Caused by: org.gradle.internal.component.NoMatchingConfigurationSelectionException: No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.0.2 was found. The consumer was configured to find a runtime of a library compatible with Java 11, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '7.6' but:
- Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'javadocElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a component, and its dependencies declared externally:
- Incompatible because this component declares documentation and the consumer needed a library
- Other compatible attributes:
- Doesn't say anything about its target Java version (required compatibility with Java 11)
- Doesn't say anything about its elements (required them packaged as a jar)
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'mavenOptionalApiElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.2 declares a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'mavenOptionalRuntimeElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.2 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'runtimeElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
- Other compatible attribute:
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
- Variant 'sourcesElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a runtime of a component, and its dependencies declared externally:
- Incompatible because this component declares documentation and the consumer needed a library
- Other compatible attributes:
- Doesn't say anything about its target Java version (required compatibility with Java 11)
- Doesn't say anything about its elements (required them packaged as a jar)
- Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
原因
Spring Initializrのところから、新しいプロジェクトを作成する際に、
Javaのバージョンをデフォルト以外で作成を試みたのですが、
GradleプラグインとJavaバージョンの整合性が合わなくなってしまったようです。
デフォルトは、Project SDK：Amazon Corretto 17、Java：17だったのですが、
試したい事がJava11での内容だった為、変更して作成しました。
しかし、Gradleプラグインとの相性が合わなかったようです。
エラーメッセージにも、以下のように出ていました。
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
> No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.0.2 was found. The consumer was configured to find a runtime of a library compatible with Java 11, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '7.6' but:
- Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.2 declares a library, packaged as a jar, and its dependencies declared externally:
- Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11Spring Initializrは、自動的にbuild.gradleを生成してくれるのですが、
内容がデフォルトバージョン前提で生成されます。
Spring Bootのバージョンによっても、対応するJavaバージョンが異なるようですので、
きちんと確認しないと私のようにトラブル要因となります。
Spring Boot公式ページのシステム要件のところにも、対応バージョンが記載されておりました。
https://spring.pleiades.io/spring-boot/docs/current/reference/html/getting-started.html
対応内容
デフォルトのJavaバージョンに合わせれば解決しますが、
今回はJava11で試したかったため、Java11に合わせるようにbuild.gradleを修正しました。
・修正前
id 'org.springframework.boot' version '3.0.2'
・修正後
id 'org.springframework.boot' version '2.7.8'
修正後、Gradleのリロードを行うと、正常に読み込まれてビルドを行えるようになりました。
2.7.8にした理由は、Maven Repositoryでorg.springframework.boot(Central)を確認すると、
2.7系では2.7.8が最新であり、
https://mvnrepository.com/artifact/org.springframework.boot/spring-boot
2.7.8のシステム要件を確認すると、
Java8が必要で、Java19まで互換性があります。
と記載されていたため、Java11も互換性があると判断しました。
補足
補足ですが、org.springframework.boot(Central)を確認した理由は、
参照先リポジトリが、MavenCentralだったためです。
別のライブラリを利用している際に、公開しているリポジトリ先が閉鎖・別のリポジトリに移設が発生し、
突然ビルド出来なくなった経験が有ります。
この辺りは事前に把握しておくと、突然のトラブルにも対応しやすいかもしれません。
今回は以上となります。
今回の内容は、バージョン違いによる些細なものとなります。
公式の情報をはじめに確認しておけば、このようなトラブルは回避しやすいと思います。
