eclipse m2e 给出了难以理解的“项目读取错误”
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m2e gives inscrutable "project read error"
提问by user1420538
I just started to use m2e to try to build the sample travellog elastic beanstalk project. On the console I'm getting "[ERROR] Project read error".
我刚开始使用 m2e 尝试构建示例 travellog elastic beanstalk 项目。在控制台上，我收到“[ERROR] 项目读取错误”。
This also appears in red on the "Dependency Hierarchy" tab.
这也在“依赖层次结构”选项卡上显示为红色。
What does this mean and how do I find out more details?
这是什么意思，我如何找到更多详细信息？
Edit: Adding pom.xml
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>
回答by user1420538
Ok. So I think I figured it out.
好的。所以我想我想通了。
In workspace\.metadata there are log files, e.g. .log mine has this entry:
在workspace\.metadata 中有日志文件，例如.log 我的有这个条目：
!ENTRY org.eclipse.m2e.logback.appender 4 0 2012-05-28 18:50:44.641
!MESSAGE Project read error
You can look in:
你可以进去看看：
Workspace\.metadata\.plugins\org.eclipse.m2e.logback.configuration
Workspace\.metadata\.plugins\org.eclipse.m2e.logback.configuration
to find the log files for m2e, e.g., 0.log
查找 m2e 的日志文件，例如 0.log
These are pretty detailed and useful. Anyway, my log file has this entry:
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.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.Hymanson:Hymanson-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
So, it appears that there is a problem with the definition for the aws-java-sdk dependencies. It specifies that the Hymanson-mapper-asl can be of version [1.8.) which appears to be invalid syntax.
因此，aws-java-sdk 依赖项的定义似乎存在问题。它指定 Hymanson-mapper-asl 可以是 [1.8.) 版本，这似乎是无效的语法。
If I modify the pom.xml to exclude that dependency it becomes:
如果我修改 pom.xml 以排除该依赖项，它将变为：
<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.Hymanson</groupId>
<artifactId>Hymanson-mapper-asl</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</project>
and this does not produce the "Project Read Error". So, basically two things:
这不会产生“项目读取错误”。所以，基本上有两件事：
- The log files are found as above, and
- There seems to be a problem in the definition of the aws-java-sdk dependencies
- 日志文件如上找到，并且
- aws-java-sdk依赖的定义好像有问题
Thanks Luca.
谢谢卢卡。
