m2e给出了难以理解的"项目读错误"

Question

我刚开始使用m2e来尝试构建示例travellog弹性beanstalk项目.在控制台上我得到"[ERROR]项目读取错误".

这也在"依赖关系层次结构"选项卡上显示为红色.

这是什么意思,我如何找到更多细节？

编辑:添加pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>BeanstalkTest</groupId>
  <artifactId>BeanstalkTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>[1.0.007,)</version>
        </dependency>
    </dependencies>

</project>

Answer 1

好.所以我想我明白了.

在workspace\.metadata中有日志文件,例如.log mine有这个条目:

!ENTRY org.eclipse.m2e.logback.appender 4 0 2012-05-28 18:50:44.641
!MESSAGE Project read error

你可以看看:

工作区\ .metadata位于\ .plugins\org.eclipse.m2e.logback.configuration

找到m2e的日志文件,例如0.log

这些非常详细和有用.无论如何,我的日志文件有这个条目:

2012-05-28 18:50:44,640 [Worker-52] ERROR o.e.m.editor.pom.DependencyTreePage - Project read error
org.eclipse.core.runtime.CoreException: Project read error
    at org.eclipse.m2e.core.embedder.MavenModelManager.readDependencyTree(MavenModelManager.java:230) ~[na:na]
    at org.eclipse.m2e.editor.pom.MavenPomEditor.readDependencyTree(MavenPomEditor.java:701) ~[na:na]
    at org.eclipse.m2e.editor.pom.DependencyTreePage$1.run(DependencyTreePage.java:215) ~[na:na]
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) [org.eclipse.core.jobs_3.5.101.v20120113-1953.jar:na]
Caused by: org.sonatype.aether.collection.DependencyCollectionException: Failed to collect dependencies for [com.amazonaws:aws-java-sdk:jar:[1.0.007,) (compile)]
    at org.sonatype.aether.impl.internal.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:262) ~[na:na]
    at org.sonatype.aether.impl.internal.DefaultRepositorySystem.collectDependencies(DefaultRepositorySystem.java:345) ~[na:na]
    at org.eclipse.m2e.core.embedder.MavenModelManager.readDependencyTree(MavenModelManager.java:226) ~[na:na]
    ... 3 common frames omitted
Caused by: org.sonatype.aether.resolution.VersionRangeResolutionException: Failed to resolve version range for org.codehaus.jackson:jackson-mapper-asl:jar:[1.8.): Invalid version range [1.8.), single version must be surrounded by []
    at org.apache.maven.repository.internal.DefaultVersionRangeResolver.resolveVersionRange(DefaultVersionRangeResolver.java:114) ~[na:na]
    at org.sonatype.aether.impl.internal.DefaultDependencyCollector.process(DefaultDependencyCollector.java:378) ~[na:na]
    at org.sonatype.aether.impl.internal.DefaultDependencyCollector.process(DefaultDependencyCollector.java:533) ~[na:na]
    at org.sonatype.aether.impl.internal.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:243) ~[na:na]
    ... 5 common frames omitted
Caused by: org.sonatype.aether.version.InvalidVersionSpecificationException: Invalid version range [1.8.), single version must be surrounded by []
    at org.sonatype.aether.util.version.GenericVersionRange.<init>(GenericVersionRange.java:84) ~[na:na]
    at org.sonatype.aether.util.version.GenericVersionScheme.parseVersionRange(GenericVersionScheme.java:40) ~[na:na]
    at org.sonatype.aether.util.version.GenericVersionScheme.parseVersionConstraint(GenericVersionScheme.java:66) ~[na:na]
    at org.apache.maven.repository.internal.DefaultVersionRangeResolver.resolveVersionRange(DefaultVersionRangeResolver.java:109) ~[na:na]
    ... 8 common frames omitted

因此,似乎aws-java-sdk依赖项的定义存在问题.它指定jackson-mapper-asl可以是版本[1.8.),这似乎是无效的语法.

如果我修改pom.xml以排除该依赖关系,它将成为:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>BeanstalkTest</groupId>
  <artifactId>BeanstalkTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>[1.0.007,)</version>
             <exclusions>
                <exclusion>
                    <groupId>org.codehaus.jackson</groupId>
                    <artifactId>jackson-mapper-asl</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

</project>

这不会产生"项目读取错误".所以,基本上有两件事:

1. 日志文件如上所示,和
2. aws-java-sdk依赖项的定义似乎存在问题

谢谢卢卡.