使用mvn构建slf4j时出错3.0.4

Question

[ERROR] Failed to execute goal on project slf4j-log4j12: Could not resolve dep 
dencies for project org.slf4j:slf4j-log4j12:jar:1.6.7-SNAPSHOT: Failed to coll 
t dependencies for [org.slf4j:slf4j-api:jar:1.6.7-SNAPSHOT (compile), log4j:lo 
j:jar:1.2.17 (compile), junit:junit:jar:3.8.1 (test)]: Failed to read artifact 
escriptor for log4j:log4j:jar:1.2.17: Could not transfer artifact log4j:log4j: 
m:1.2.17 from/to central (http://repo.maven.apache.org/maven2): Connection to 
tp://repo.maven.apache.org refused: Connection timed out: connect -> [Help 1] 
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
n project slf4j-log4j12: Could not resolve dependencies for project org.slf4j: 
f4j-log4j12:jar:1.6.7-SNAPSHOT: Failed to collect dependencies for [org.slf4j: 
f4j-api:jar:1.6.7-SNAPSHOT (compile), log4j:log4j:jar:1.2.17 (compile), junit: 
nit:jar:3.8.1 (test)] 
     at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.get 
pendencies(LifecycleDependencyResolver.java:210) 
     at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.res 
veProjectDependencies(LifecycleDependencyResolver.java:117) 
     at org.apache.maven.lifecycle.internal.MojoExecutor.ensureDependencies 
eResolved(MojoExecutor.java:258) 
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecut 
.java:201) 
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecut 
.java:153) 
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecut 
.java:145) 
     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildPro 
ct(LifecycleModuleBuilder.java:84) 
     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildPro 
ct(LifecycleModuleBuilder.java:59) 
     at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreaded 
ild(LifecycleStarter.java:183) 
     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecy 
eStarter.java:161) 
     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320) 
     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156) 
     at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537) 
     at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) 
     at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImp 
java:39) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcc 
sorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(La 
cher.java:290) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.j 
a:230) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(
uncher.java:409) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.jav 
352) 
Caused by: org.apache.maven.project.DependencyResolutionException: Could not r 
olve dependencies for project org.slf4j:slf4j-log4j12:jar:1.6.7-SNAPSHOT: Fail 
to collect dependencies for [org.slf4j:slf4j-api:jar:1.6.7-SNAPSHOT (compile) 
log4j:log4j:jar:1.2.17 (compile), junit:junit:jar:3.8.1 (test)] 
     at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve 
efaultProjectDependenciesResolver.java:158) 
     at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.get 
pendencies(LifecycleDependencyResolver.java:185) 
     ... 22 more 
Caused by: org.sonatype.aether.collection.DependencyCollectionException: Faile 
to collect dependencies for [org.slf4j:slf4j-api:jar:1.6.7-SNAPSHOT (compile), 
og4j:log4j:jar:1.2.17 (compile), junit:junit:jar:3.8.1 (test)] 
     at org.sonatype.aether.impl.internal.DefaultDependencyCollector.collec 
ependencies(DefaultDependencyCollector.java:258) 
     at org.sonatype.aether.impl.internal.DefaultRepositorySystem.collectDe 
ndencies(DefaultRepositorySystem.java:308) 
     at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve 
efaultProjectDependenciesResolver.java:150) 
     ... 23 more 
Caused by: org.sonatype.aether.resolution.ArtifactDescriptorException: Failed 
read artifact descriptor for log4j:log4j:jar:1.2.17 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReade 
loadPom(DefaultArtifactDescriptorReader.java:296) 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReade 
readArtifactDescriptor(DefaultArtifactDescriptorReader.java:186) 
     at org.sonatype.aether.impl.internal.DefaultDependencyCollector.proces 
DefaultDependencyCollector.java:412) 
     at org.sonatype.aether.impl.internal.DefaultDependencyCollector.collec 
ependencies(DefaultDependencyCollector.java:240) 
     ... 25 more 
Caused by: org.sonatype.aether.resolution.ArtifactResolutionException: Could n 
transfer artifact log4j:log4j:pom:1.2.17 from/to central (http://repo.maven.a 
che.org/maven2): Connection to http://repo.maven.apache.org refused 
     at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(D 
aultArtifactResolver.java:538) 
     at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveAr 
facts(DefaultArtifactResolver.java:216) 
     at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveAr 
fact(DefaultArtifactResolver.java:193) 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReade 
loadPom(DefaultArtifactDescriptorReader.java:281) 
     ... 28 more 
Caused by: org.sonatype.aether.transfer.ArtifactTransferException: Could not t 
nsfer artifact log4j:log4j:pom:1.2.17 from/to central (http://repo.maven.apach 
org/maven2): Connection to http://repo.maven.apache.org refused 
     at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$4.wrap 
agonRepositoryConnector.java:951) 
     at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$4.wrap 
agonRepositoryConnector.java:941) 
     at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTas 
run(WagonRepositoryConnector.java:669) 
     at org.sonatype.aether.util.concurrency.RunnableErrorForwarder$1.run(R 
nableErrorForwarder.java:60) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolEx 
utor.java:886) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecut 
.java:908) 
     at java.lang.Thread.run(Thread.java:662) 
Caused by: org.apache.maven.wagon.TransferFailedException: Connection to http: 
repo.maven.apache.org refused 
     at org.apache.maven.wagon.shared.http4.AbstractHttpClientWagon.fillInp 
Data(AbstractHttpClientWagon.java:799) 
     at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java: 
6) 
     at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88) 
     at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61) 
     at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTas 
run(WagonRepositoryConnector.java:601) 
     ... 4 more 
Caused by: org.apache.maven.wagon.providers.http.httpclient.conn.HttpHostConne 
Exception: Connection to http://repo.maven.apache.org refused 
     at org.apache.maven.wagon.providers.http.httpclient.impl.conn.DefaultC 
entConnectionOperator.openConnection(DefaultClientConnectionOperator.java:158) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.conn.Abstract 
olEntry.open(AbstractPoolEntry.java:149) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.conn.Abstract 
oledConnAdapter.open(AbstractPooledConnAdapter.java:121) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.client.Defaul 
equestDirector.tryConnect(DefaultRequestDirector.java:573) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.client.Defaul 
equestDirector.execute(DefaultRequestDirector.java:425) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.client.Abstra 
HttpClient.execute(AbstractHttpClient.java:820) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.client.Abstra 
HttpClient.execute(AbstractHttpClient.java:754) 
     at org.apache.maven.wagon.shared.http4.AbstractHttpClientWagon.execute 
bstractHttpClientWagon.java:674) 
     at org.apache.maven.wagon.shared.http4.AbstractHttpClientWagon.fillInp 
Data(AbstractHttpClientWagon.java:793) 
     ... 8 more 
Caused by: java.net.ConnectException: Connection timed out: connect 
     at java.net.PlainSocketImpl.socketConnect(Native Method) 
     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) 
     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) 
     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) 
     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) 
     at java.net.Socket.connect(Socket.java:529) 
     at org.apache.maven.wagon.providers.http.httpclient.conn.scheme.PlainS 
ketFactory.connectSocket(PlainSocketFactory.java:123) 
     at org.apache.maven.wagon.providers.http.httpclient.impl.conn.DefaultC 
entConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148) 
     ... 16 more 
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please r 
d the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyRe 
lutionException 
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the comma 

[ERROR] mvn <goals> -rf :slf4j-log4j12 

我还没有修改任何代码。我只是克隆它，并试图建立使用mvn -install。任何想法为什么这个错误即将到来？

Answer 1

它与maven或slf4j无关，这是一个网络错误，因为您无法访问中央Maven存储库（“连接超时”到repo.maven.apache.org）。资源库（暂时）关闭，或者您遇到网络问题（例如缺少代理）。