我正在尝试从 drools 工作台编写一些与 OptaPlanner 一起使用的业务规则。为此，我需要将 optaplanner-core.jar 文件添加为依赖项，以便我的规则文件将验证和构建。上传 jar 文件时，出现以下异常：
May 14, 2015 2:41:28 PM org.kie.workbench.common.services.backend.builder.BuildServiceImpl build
SEVERE: org.kie.scanner.embedder.MavenEmbedderException: Failed to read artifact descriptor for org.optaplanner:optaplanner-core:jar:6.1.0.Final
java.lang.RuntimeException: org.kie.scanner.embedder.MavenEmbedderException: Failed to read artifact descriptor for org.optaplanner:optaplanner-core:jar:6.1.0.Final
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:44)
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:35)
at org.kie.scanner.ArtifactResolver.getResolverFor(ArtifactResolver.java:100)
at org.kie.scanner.KieModuleMetaDataImpl.<init>(KieModuleMetaDataImpl.java:68)
at org.kie.scanner.KieModuleMetaData$Factory.newKieModuleMetaData(KieModuleMetaData.java:30)
at org.kie.workbench.common.services.backend.builder.Builder.build(Builder.java:177)
at org.kie.workbench.common.services.backend.builder.BuildServiceImpl.doBuild(BuildServiceImpl.java:153)
at org.kie.workbench.common.services.backend.builder.BuildServiceImpl.build(BuildServiceImpl.java:79)
at org.kie.workbench.common.services.backend.builder.BuildServiceImpl$Proxy$_$$_WeldClientProxy.build(BuildServiceImpl$Proxy$_$$_WeldClientProxy.java)
at org.guvnor.common.services.builder.ResourceChangeIncrementalBuilder$3.execute(ResourceChangeIncrementalBuilder.java:236)
at org.guvnor.common.services.builder.IncrementalBuilderExecutorManager$1.run(IncrementalBuilderExecutorManager.java:50)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.kie.scanner.embedder.MavenEmbedderException: Failed to read artifact descriptor for org.optaplanner:optaplanner-core:jar:6.1.0.Final
at org.kie.scanner.embedder.MavenEmbedder.readProject(MavenEmbedder.java:298)
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:42)
... 13 more
Caused by: org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.optaplanner:optaplanner-core:jar:6.1.0.Final
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:384)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:231)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.resolveCachedArtifactDescriptor(DefaultDependencyCollector.java:525)
at org.eclipse.aether.internal.impl.DefaultDependencyCollector.getArtifactDescriptorResult(DefaultDependencyCollector.java:509)
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)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies(DefaultRepositorySystem.java:316)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:159)
at org.apache.maven.project.DefaultProjectBuilder.resolveDependencies(DefaultProjectBuilder.java:202)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:175)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:114)
at org.kie.scanner.embedder.MavenEmbedder.readProject(MavenEmbedder.java:294)
... 14 more
Caused by: org.apache.maven.model.resolution.UnresolvableModelException: Failure to transfer org.optaplanner:optaplanner:pom:6.1.0.Final from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.optaplanner:optaplanner:pom:6.1.0.Final from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org
at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:154)
at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:203)
at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:903)
at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:755)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:309)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:375)
... 27 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Failure to transfer org.optaplanner:optaplanner:pom:6.1.0.Final from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.optaplanner:optaplanner:pom:6.1.0.Final from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org
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:150)
... 32 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Failure to transfer org.optaplanner:optaplanner:pom:6.1.0.Final from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.optaplanner:optaplanner:pom:6.1.0.Final from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:238)
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:206)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.gatherDownloads(DefaultArtifactResolver.java:585)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:503)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
... 35 more
我尝试通过上传文件以及仅使用“添加”按钮并指定 Maven 存储库信息，我得到了同样的异常。任何想法为什么我无法上传这个 jar 文件以及我可能需要做什么？谢谢！