報下面的錯，哪位大神能解答一下么？

Failed to read artifact descriptor for com.fasterxml.jackson.core:jackson-databind:jar:2.9.4

org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for com.fasterxml.jackson.core:jackson-databind:jar:2.9.4
?? ?at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:282)
?? ?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.doRecurse(DefaultDependencyCollector.java:504)
?? ?at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:458)
?? ?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.doRecurse(DefaultDependencyCollector.java:504)
?? ?at org.eclipse.aether.internal.impl.DefaultDependencyCollector.processDependency(DefaultDependencyCollector.java:458)
?? ?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:172)
?? ?at org.apache.maven.project.DefaultProjectBuilder.resolveDependencies(DefaultProjectBuilder.java:215)
?? ?at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:188)
?? ?at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:119)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenImpl.readMavenProject(MavenImpl.java:636)
?? ?at org.eclipse.m2e.core.internal.project.registry.DefaultMavenDependencyResolver.resolveProjectDependencies(DefaultMavenDependencyResolver.java:63)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refreshPhase2(ProjectRegistryManager.java:530)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:492)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:1)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:177)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:496)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:351)
?? ?at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:298)
?? ?at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.getProjectFacade(MavenBuilder.java:154)
?? ?at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:89)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:177)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
?? ?at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
?? ?at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
?? ?at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
?? ?at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:735)
?? ?at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
?? ?at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
?? ?at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
?? ?at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:301)
?? ?at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
?? ?at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:304)
?? ?at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:360)
?? ?at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:383)
?? ?at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:142)
?? ?at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:232)
?? ?at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Failure to transfer com.fasterxml.jackson.core:jackson-databind:pom:2.9.4 from https://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 com.fasterxml.jackson.core:jackson-databind:pom:2.9.4 from/to central (https://repo.maven.apache.org/maven2): connect timed out
?? ?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.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:267)
?? ?... 49 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Failure to transfer com.fasterxml.jackson.core:jackson-databind:pom:2.9.4 from https://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 com.fasterxml.jackson.core:jackson-databind:pom:2.9.4 from/to central (https://repo.maven.apache.org/maven2): connect timed out
?? ?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)
?? ?... 52 more