为什么从 Spring boot 版本 2.1.4 更改为 2.1.5 会出现未知配置 Maven 错误? [英] Why does change from Spring boot version 2.1.4 to 2.1.5 gives unknown configuration Maven error?

问题描述

我已经安装了 Eclipse(实际上是 Spring Tool Suite).它随 Maven 一起提供.我创建了 Spring boot 启动项目.Maven 正在下载所有依赖项，一切正常.

最近，我创建了一个新项目.这一次，我注意到 pom.xml 中的一个错误以及显示以下内容的问题窗口(在 STS 中):

描述资源路径位置类型未知 pom.xml/TestSessionAttribute line 1 Maven 配置问题

我注意到spring boot版本是2.1.5(之前是2.1.4).

<groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.5.RELEASE</version><relativePath/><!-- 从存储库中查找父级 --></父母>

我继续更新项目(Maven > 更新项目)，并选中强制更新快照/发布".这并没有解决问题.我确实看到了

spring-boot-2.1.5.RELEASE.jar

在 m2 存储库中.

我回去将版本更改为 2.1.4，然后是 Maven > 更新项目，错误消失了.

当版本为 2.1.5 时，为什么我会收到 Maven 错误?

解决方案

根据 此 链接，您可以通过将 maven-jar-plugin 降级到 3.1.1(从 3.1.2)来解决该问题.我可以确认此修复程序适用于我自己的项目.

将以下条目添加到您的 pom 以解决该问题.

<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version></属性>

eclipse 的官方错误条目也存在.>

I had installed Eclipse (actually Spring Tool Suite). It came with Maven. I had created Spring boot starter projects. Maven was downloading all the dependencies and things were working fine.

Recently, I created a new project. This time, I noticed an error in pom.xml and the problem window (in STS) showing the following:

Description Resource    Path                    Location   Type
Unknown     pom.xml     /TestSessionAttribute   line 1     Maven Configuration Problem

I noticed that the spring boot version was at 2.1.5 (it was 2.1.4 before).

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

I went ahead and did an update of the project (Maven > Update project) with the 'Force Update of Snapshots/Releases' checked. This did not resolve the problem. I do see the

spring-boot-2.1.5.RELEASE.jar

in the m2 repository.

I went back and changed the version to 2.1.4 and then a Maven > Update Project and the errors went away.

Why am I getting the Maven error when version is 2.1.5?

解决方案

According to this link you can fix the issue by downgrading the maven-jar-plugin to 3.1.1 (from 3.1.2). I can confirm that the fix works for my own projects.

Add the following entry to your pom to fix that issue.

<properties>
    <maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>

An official bug entry for eclipse exists as well.

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