当我运行时maven install -o -X，maven 将输出（一个 jar）放入 .m2 文件夹中。问题是，在我的例子中，这会生成一个名为“maven-metadata-local.xml”的元数据文件。当我从另一个 Maven 构建引用此工件时，maven 抱怨找不到元数据文件“maven-metadata.xml”（在完全相同的位置）。
所以基本上我要问的问题是：
第二个pom中的依赖是：
<dependencies>
<dependency>
<groupId>a.b.c</groupId>
<artifactId>d</artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
</dependencies>
jar 在本地 .m2 目录中的位置是
.m2/a/b/c/d/1.0.0-SNAPSHOT/d-1.0.0-SNAPSHOT.jar
这是错误消息：
[DEBUG] =======================================================================
[DEBUG] Cannot access central (https://repo1.maven.org/maven2) in offline mode and the metadata ch.*****.*****:*****-server:1.0.0-SNAPSHOT/maven-metadata.xml has not been downloaded from it before
[DEBUG] Cannot access central (https://repo1.maven.org/maven2) in offline mode and the metadata ch.*****.*****:*****-server:1.0.0-SNAPSHOT/maven-metadata.xml has not been downloaded from it before
[DEBUG] Could not find metadata ch.*****.*****:*****-project:1.0.0-SNAPSHOT/maven-metadata.xml in local (/home/*****/.m2/repository)
[DEBUG] Cannot access central (https://repo1.maven.org/maven2) in offline mode and the metadata ch.*****.*****:*****-project:1.0.0-SNAPSHOT/maven-metadata.xml has not been downloaded from it before
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=1, ConflictMarker.markTime=0, ConflictMarker.nodeCount=2, ConflictIdSorter.graphTime=0, ConflictIdSorter.topsortTime=1, ConflictIdSorter.conflictIdCount=1, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=3, ConflictResolver.conflictItemCount=1, DefaultDependencyCollector.collectTime=17, DefaultDependencyCollector.transformTime=7}
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.268 s
[INFO] Finished at: 2016-11-29T15:25:03+01:00
[INFO] Final Memory: 16M/481M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project *****-assembly: Could not resolve dependencies for project ch.*****.*****:*****-assembly:pom:1.0.0-SNAPSHOT: Failed to collect dependencies at ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT: Failed to read artifact descriptor for ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT: Cannot access central (https://repo1.maven.org/maven2) in offline mode and the artifact ch.*****.*****:*****-project:pom:1.0.0-SNAPSHOT has not been downloaded from it before. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project *****-assembly: Could not resolve dependencies for project ch.*****.*****:*****-assembly:pom:1.0.0-SNAPSHOT: Failed to collect dependencies at ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(LifecycleDependencyResolver.java:221)
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveProjectDependencies(LifecycleDependencyResolver.java:127)
at org.apache.maven.lifecycle.internal.MojoExecutor.ensureDependenciesAreResolved(MojoExecutor.java:245)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:199)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.project.DependencyResolutionException: Could not resolve dependencies for project ch.*****.*****:*****-assembly:pom:1.0.0-SNAPSHOT: Failed to collect dependencies at ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:180)
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(LifecycleDependencyResolver.java:195)
... 23 more
Caused by: org.eclipse.aether.collection.DependencyCollectionException: Failed to collect dependencies at ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:291)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies(DefaultRepositorySystem.java:316)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:172)
... 24 more
Caused by: org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for ch.*****.*****:*****-server:jar:1.0.0-SNAPSHOT
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:329)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:198)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.resolveCachedArtifactDescriptor(DefaultDependencyCollector.java:535)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.getArtifactDescriptorResult(DefaultDependencyCollector.java:519)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:409)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:363)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.process(DefaultDependencyCollector.java:351)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:254)
... 26 more
Caused by: org.apache.maven.model.resolution.UnresolvableModelException: Cannot access central (https://repo1.maven.org/maven2) in offline mode and the artifact ch.*****.*****:*****-project:pom:1.0.0-SNAPSHOT has not been downloaded from it before.
at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:177)
at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:226)
at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:1000)
at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:800)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:329)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:320)
... 33 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Cannot access central (https://repo1.maven.org/maven2) in offline mode and the artifact ch.*****.*****:*****-project:pom:1.0.0-SNAPSHOT has not been downloaded from it before.
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:444)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:223)
at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:173)
... 38 more
Caused by: org.eclipse.aether.transfer.ArtifactNotFoundException: Cannot access central (https://repo1.maven.org/maven2) in offline mode and the artifact ch.*****.*****:*****-project:pom:1.0.0-SNAPSHOT has not been downloaded from it before.
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:391)
... 41 more
Caused by: org.eclipse.aether.transfer.RepositoryOfflineException: Cannot access central (https://repo1.maven.org/maven2) in offline mode
at org.eclipse.aether.internal.impl.DefaultOfflineController.checkOffline(DefaultOfflineController.java:72)
at org.eclipse.aether.internal.impl.Utils.checkOffline(Utils.java:115)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:387)
... 41 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
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