maven国内源及常见问题

有时候maven编译或者打包时下载包的阶段出错，一般都是网络问题，相信自己，你没写错。如：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test (default-test) on project myusml: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test failed: Plugin org.apache.maven.plugins:maven-surefire-plugin:2.18.1 or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.maven.plugins:maven-surefire-plugin:jar:2.18.1 -> org.apache.maven.surefire:maven-surefire-common:jar:2.18.1: Failed to read artifact descriptor for org.apache.maven.surefire:maven-surefire-common:jar:2.18.1: Could not transfer artifact org.apache.maven.surefire:maven-surefire-common:pom:2.18.1 from/to central (https://repo.maven.apache.org/maven2): Remote host closed connection during handshake: SSL peer shut down incorrectly -> [Help 1]

国内访问某些外国网站的网络很不稳定，因此需要添加国内的中央库：

1、修改$M2_HOME/conf/setting.xml中添加国内的源
（1）配置 mirror

<mirrors>...        <mirror>            <id>osc</id>            <mirrorOf>central</mirrorOf>            <url>http://maven.oschina.net/content/groups/public/</url>        </mirror>        <mirror>            <id>osc_thirdparty</id>            <mirrorOf>thirdparty</mirrorOf>            <url>http://maven.oschina.net/content/repositories/thirdparty/</url>        </mirror>...</mirrors>

（2）配置 profile

<profiles>...        <profile>            <id>osc</id>            <activation>                <activeByDefault>true</activeByDefault>            </activation>            <repositories>                <repository>                    <id>osc</id>                    <url>http://maven.oschina.net/content/groups/public/</url>                </repository>                <repository>                    <id>osc_thirdparty</id>                    <url>http://maven.oschina.net/content/repositories/thirdparty/</url>                </repository>            </repositories>            <pluginRepositories>                <pluginRepository>                    <id>osc</id>                    <url>http://maven.oschina.net/content/groups/public/</url>                </pluginRepository>            </pluginRepositories>        </profile>...</profiles>

详见http://maven.oschina.net/help.html

2、出现以下错误：
Description Resource Path Location Type Could not calculate build plan: Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:2.0.2

执行：
find ~/.m2 -name “*.lastUpdated” -exec grep -q “Could not transfer” {} \; -print -exec rm {} \;
原因是之前有一些下载失败了。
详见http://stackoverflow.com/questions/5074063/maven-error-failure-to-transfer

3、配置eclipse使用本地安装的maven，而不是自带的版本。同时在User setting里面，也要指定setting.xml是使用哪个配置文件，从而指定国内的库。
否则国内有时候连不上maven中央库，导致出现以下异常：

Description Resource    Path    Location    TypeFailed to read artifact descriptor for org.apache.storm:storm-core:jar:0.10.0org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.apache.storm:storm-core:jar:0.10.0    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:302)    at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:218)    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)    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:529)    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:491)    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:176)    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:495)    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:350)    at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:297)    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration0(ProjectConfigurationManager.java:398)    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$2.call(ProjectConfigurationManager.java:345)    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$2.call(ProjectConfigurationManager.java:1)    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)    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.embedder.MavenImpl.execute(MavenImpl.java:1351)    at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:342)    at org.eclipse.m2e.core.ui.internal.UpdateMavenProjectJob.runInWorkspace(UpdateMavenProjectJob.java:77)    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Failure to transfer org.apache.storm:storm-core:pom:0.10.0 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 org.apache.storm:storm-core:pom:0.10.0 from/to central (https://repo.maven.apache.org/maven2): Remote host closed connection during handshake    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:287)    ... 33 moreCaused by: org.eclipse.aether.transfer.ArtifactTransferException: Failure to transfer org.apache.storm:storm-core:pom:0.10.0 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 org.apache.storm:storm-core:pom:0.10.0 from/to central (https://repo.maven.apache.org/maven2): Remote host closed connection during handshake    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)    ... 36 more    pom.xml /stormfilter    line 1  Maven Dependency Problem

如果还不行，先到命令行执行mvn clean package，看原因是什么，很有可能是连接中央库失败。