Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved

Question

I have install maven in my machine. I have properly set the class-path and maven home folder. Every time I execute mvn clean install, it gives me exception. I have also tried to delete the .m2 folder but the same result.

• mvn -version output

  Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T19:57:37+08:00) Maven home: C:\maven-3 Java version: 1.7.0_45, vendor: Oracle Corporation Java home: D:\jdk170_45\jre Default locale: en_US, platform encoding: MS950 OS name: "windows 7", version: "6.1", arch: "x86", family: "windows" 

• log for mvn -X clean install

      Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T19:57:37+08:00)     Maven home: C:\maven-3     Java version: 1.7.0_45, vendor: Oracle Corporation     Java home: D:\jdk170_45\jre     Default locale: en_US, platform encoding: MS950     OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"     [DEBUG] Created new class realm maven.api     [DEBUG] Importing foreign packages into class realm maven.api     [DEBUG]   Imported: javax.enterprise.inject.* < plexus.core     [DEBUG]   Imported: javax.enterprise.util.* < plexus.core     [DEBUG]   Imported: javax.inject.* < plexus.core     [DEBUG]   Imported: org.apache.maven.* < plexus.core     [DEBUG]   Imported: org.apache.maven.artifact < plexus.core     [DEBUG]   Imported: org.apache.maven.classrealm < plexus.core     [DEBUG]   Imported: org.apache.maven.cli < plexus.core     [DEBUG]   Imported: org.apache.maven.configuration < plexus.core     [DEBUG]   Imported: org.apache.maven.exception < plexus.core     [DEBUG]   Imported: org.apache.maven.execution < plexus.core     [DEBUG]   Imported: org.apache.maven.execution.scope < plexus.core     [DEBUG]   Imported: org.apache.maven.lifecycle < plexus.core     [DEBUG]   Imported: org.apache.maven.model < plexus.core     [DEBUG]   Imported: org.apache.maven.monitor < plexus.core     [DEBUG]   Imported: org.apache.maven.plugin < plexus.core     [DEBUG]   Imported: org.apache.maven.profiles < plexus.core     [DEBUG]   Imported: org.apache.maven.project < plexus.core     [DEBUG]   Imported: org.apache.maven.reporting < plexus.core     [DEBUG]   Imported: org.apache.maven.repository < plexus.core     [DEBUG]   Imported: org.apache.maven.rtinfo < plexus.core     [DEBUG]   Imported: org.apache.maven.settings < plexus.core     [DEBUG]   Imported: org.apache.maven.toolchain < plexus.core     [DEBUG]   Imported: org.apache.maven.usability < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.* < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.authentication < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.authorization < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.events < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.observers < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.proxy < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.repository < plexus.core     [DEBUG]   Imported: org.apache.maven.wagon.resource < plexus.core     [DEBUG]   Imported: org.codehaus.classworlds < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.* < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.classworlds < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.component < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.configuration < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.container < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.context < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.lifecycle < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.logging < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.personality < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core     [DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core     [DEBUG]   Imported: org.eclipse.aether.* < plexus.core     [DEBUG]   Imported: org.eclipse.aether.artifact < plexus.core     [DEBUG]   Imported: org.eclipse.aether.collection < plexus.core     [DEBUG]   Imported: org.eclipse.aether.deployment < plexus.core     [DEBUG]   Imported: org.eclipse.aether.graph < plexus.core     [DEBUG]   Imported: org.eclipse.aether.impl < plexus.core     [DEBUG]   Imported: org.eclipse.aether.installation < plexus.core     [DEBUG]   Imported: org.eclipse.aether.internal.impl < plexus.core     [DEBUG]   Imported: org.eclipse.aether.metadata < plexus.core     [DEBUG]   Imported: org.eclipse.aether.repository < plexus.core     [DEBUG]   Imported: org.eclipse.aether.resolution < plexus.core     [DEBUG]   Imported: org.eclipse.aether.spi < plexus.core     [DEBUG]   Imported: org.eclipse.aether.transfer < plexus.core     [DEBUG]   Imported: org.eclipse.aether.version < plexus.core     [DEBUG]   Imported: org.slf4j.* < plexus.core     [DEBUG]   Imported: org.slf4j.spi.* < plexus.core     [DEBUG] Populating class realm maven.api     [INFO] Error stacktraces are turned on.     [DEBUG] Reading global settings from C:\maven-3\conf\settings.xml     [DEBUG] Reading user settings from C:\Users\H1514\.m2\settings.xml     [DEBUG] Reading global toolchains from C:\maven-3\conf\toolchains.xml     [DEBUG] Reading user toolchains from C:\Users\H1514\.m2\toolchains.xml     [DEBUG] Using local repository at C:\Users\H1514\.m2\repository     [DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for C:\Users\H1514\.m2\repository     [INFO] Scanning for projects...     [DEBUG] Extension realms for project camel:camel:jar:0.0.1-SNAPSHOT: (none)     [DEBUG] Looking up lifecyle mappings for packaging jar from ClassRealm[plexus.core, parent: null]     [DEBUG] === REACTOR BUILD PLAN ================================================     [DEBUG] Project: camel:camel:jar:0.0.1-SNAPSHOT     [DEBUG] Tasks:   [clean, install]     [DEBUG] Style:   Regular     [DEBUG] =======================================================================     [INFO]                                                                              [INFO] ------------------------------------------------------------------------     [INFO] Building camel 0.0.1-SNAPSHOT     [INFO] ------------------------------------------------------------------------     [DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]     [DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]     [DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]     [DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]     [DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]     [DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]     [DEBUG] Using transporter WagonTransporter with priority -1.0 for https://repo.maven.apache.org/maven2     [DEBUG] Using connector BasicRepositoryConnector with priority 0.0 for https://repo.maven.apache.org/maven2     Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom      [DEBUG] Writing tracking file C:\Users\H1514\.m2\repository\org\apache\maven\plugins\maven-clean-plugin\2.5\maven-clean-plugin-2.5.pom.lastUpdated     [INFO] ------------------------------------------------------------------------     [INFO] BUILD FAILURE     [INFO] ------------------------------------------------------------------------     [INFO] Total time: 22.858 s     [INFO] Finished at: 2015-05-29T14:11:00+08:00     [INFO] Final Memory: 5M/15M     [INFO] ------------------------------------------------------------------------     [ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [repo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect -> [Help 1]     org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5         at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:117)         at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:179)         at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getMojoDescriptor(DefaultMavenPluginManager.java:298)         at org.apache.maven.plugin.DefaultBuildPluginManager.getMojoDescriptor(DefaultBuildPluginManager.java:241)         at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.setupMojoExecution(DefaultLifecycleExecutionPlanCalculator.java:169)         at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.setupMojoExecutions(DefaultLifecycleExecutionPlanCalculator.java:155)         at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:131)         at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:145)         at org.apache.maven.lifecycle.internal.builder.BuilderCommon.resolveBuildPlan(BuilderCommon.java:96)         at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:109)         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:862)         at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)         at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)         at java.lang.reflect.Method.invoke(Method.java:606)         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.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5         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.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:287)         at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:103)         ... 26 more     Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [repo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect         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)         ... 29 more     Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [repo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect         at org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:43)         at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:355)         at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)         at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:581)         at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:249)         at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:520)         at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)         ... 32 more     Caused by: org.apache.maven.wagon.TransferFailedException: Connect to repo.maven.apache.org:443 [repo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect         at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:1066)         at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:960)         at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java:116)         at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88)         at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)         at org.eclipse.aether.transport.wagon.WagonTransporter$GetTaskRunner.run(WagonTransporter.java:560)         at org.eclipse.aether.transport.wagon.WagonTransporter.execute(WagonTransporter.java:427)         at org.eclipse.aether.transport.wagon.WagonTransporter.get(WagonTransporter.java:404)         at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask(BasicRepositoryConnector.java:447)         at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:350)         ... 37 more     Caused by: org.apache.maven.wagon.providers.http.httpclient.conn.HttpHostConnectException: Connect to repo.maven.apache.org:443 [repo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect         at org.apache.maven.wagon.providers.http.httpclient.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:140)         at org.apache.maven.wagon.providers.http.httpclient.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:318)         at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)         at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.MainClientExec.execute(MainClientExec.java:219)         at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)         at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec.execute(RetryExec.java:86)         at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RedirectExec.execute(RedirectExec.java:108)         at org.apache.maven.wagon.providers.http.httpclient.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)         at org.apache.maven.wagon.providers.http.httpclient.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)         at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.execute(AbstractHttpClientWagon.java:832)         at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:983)         ... 46 more     Caused by: java.net.ConnectException: Connection timed out: connect         at java.net.DualStackPlainSocketImpl.connect0(Native Method)         at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)         at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)         at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)         at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)         at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)         at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)         at java.net.Socket.connect(Socket.java:579)         at org.apache.maven.wagon.providers.http.httpclient.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:239)         at org.apache.maven.wagon.providers.http.httpclient.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:123)         ... 56 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/PluginResolutionException 

Answer 1

Your debug output indicates that Clean is the first thing that it's trying to run, so I'm guessing it's failing to download any plugins from central.

First off, see if you can download the plugin jar directly in a web browser: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.jar

If that works then your web browser has connectivity to central but maven doesn't. That suggests to me that your web browser is using a proxy that maven isn't configured to use.

Maven proxy settings are described in depth here. To simplify that a little fill this out (replace the protocol/host/port with the values from your internet settings) and put it in the <settings> tag of your maven settings.xml file:

<proxies>   <proxy>     <id>proxy</id>     <active>true</active>     <protocol>http</protocol>     <host>proxy.example.com</host>     <port>8080</port>   </proxy> </proxies> 

Answer 2

The error is due to maven official repository being not accessible. This repo (https://repo.maven.apache.org/maven2/) is not accessible so follow these steps:

1. Firstly delete your /home/user/.m2 folder
2. create .m2 folder at user home and repository folder within .m2
3. copy the default settings.xml to .m2 folder
4. Change mirrors as follows in the settings.xml as shown in below snap mirror_settings

<mirrors>    <mirror>      <id>UK</id>      <name>UK Central</name>      <url>http://uk.maven.org/maven2</url>      <mirrorOf>central</mirrorOf>    </mirror>  </mirrors>

5. Execute the mvn clean commands now .....