java Intellij Idea Maven“无法重新连接”错误
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Intellij Idea Maven 'cannot reconnect' error
提问by MeetJoeBlack
Maybe you can help me
I got a strange apache maven's problem, when opening my project at Intellij Idea 13.
When projects was open I have no libraries at External Libraries section. And at all pom.xml files from diff's modules I see error "Cannot reconnect".
也许你可以帮助我，当我在 Intellij Idea 13 上打开我的项目时，我遇到了一个奇怪的 apache maven 问题。当项目打开时，我在外部库部分没有库。在 diff 模块中的所有 pom.xml 文件中，我看到错误“无法重新连接”。
I tried to Invalidate Cache/Restart Idea, try to use Maven Reimport but problem still take a place. But if I do mvn clean install, and deploy my projects everything works fine. I use Maven 3.2.3. and Java 1.8.
我试图使缓存/重新启动想法无效，尝试使用 Maven Reimport 但问题仍然存在。但是，如果我执行 mvn clean install 并部署我的项目，一切正常。我使用 Maven 3.2.3。和 Java 1.8。
Maven settings:
Maven 设置：
Aded idea.log files:
添加idea.log文件：
2015-06-03 11:54:24,585 [ 441715] INFO - #org.jetbrains.idea.maven - Cannot reconnect.
java.lang.RuntimeException: Cannot reconnect.
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:98)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.resolveProject(MavenEmbedderWrapper.java:97)
at org.jetbrains.idea.maven.project.MavenProjectReader.resolveProject(MavenProjectReader.java:462)
at org.jetbrains.idea.maven.project.MavenProject.resolve(MavenProject.java:624)
at org.jetbrains.idea.maven.project.MavenProjectsTree.resolve(MavenProjectsTree.java:1215)
at org.jetbrains.idea.maven.project.MavenProjectsProcessorResolvingTask.perform(MavenProjectsProcessorResolvingTask.java:42)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:131)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.access0(MavenProjectsProcessor.java:28)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.run(MavenProjectsProcessor.java:107)
at org.jetbrains.idea.maven.utils.MavenUtil.run(MavenUtil.java:440)
at com.intellij.openapi.application.impl.ApplicationImpl.run(ApplicationImpl.java:419)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
at com.intellij.openapi.application.impl.ApplicationImpl.run(ApplicationImpl.java:149)
Caused by: java.rmi.ServerError: Error occurred in server thread; nested exception is:
java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:351)
at sun.rmi.transport.Transport.run(Transport.java:200)
at sun.rmi.transport.Transport.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run4(TCPTransport.java:683)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda/99407688.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:275)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:252)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:161)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
at com.sun.proxy.$Proxy121.resolveProject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.execution.rmi.RemoteUtil.compute(RemoteUtil.java:106)
at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:167)
at com.intellij.execution.rmi.RemoteUtil.invoke(RemoteUtil.java:102)
at com.sun.proxy.$Proxy121.resolveProject(Unknown Source)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.execute(MavenEmbedderWrapper.java:100)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.execute(MavenEmbedderWrapper.java:97)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:89)
... 16 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
at org.apache.maven.wagon.providers.file.FileWagon.resolveDestinationPath(FileWagon.java:206)
at org.apache.maven.wagon.providers.file.FileWagon.resourceExists(FileWagon.java:265)
at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:577)
at org.sonatype.aether.util.concurrency.RunnableErrorForwarder.run(RunnableErrorForwarder.java:60)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2015-06-03 11:54:24,586 [ 441716] WARN - ution.rmi.RemoteProcessSupport - Exception in thread "pool-6-thread-1" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
2015-06-03 11:54:24,586 [ 441716] WARN - ution.rmi.RemoteProcessSupport - at org.apache.maven.wagon.providers.file.FileWagon.resolveDestinationPath(FileWagon.java:206)
回答by mherBaghinyan
Delete the entire .m2/repository folder manually, and then update your Maven project again.
手动删除整个 .m2/repository 文件夹，然后再次更新您的 Maven 项目。
回答by luffy
I fixed this by changing my local Maven 3.3.9 to Idea Bundle Maven3.
我通过将本地 Maven 3.3.9 更改为 Idea Bundle Maven3 来解决此问题。
回答by Subhajit
I was facing the same error and I have fixed it by; IntelliJ -> Setting-> Build, Execution, Deployment ->Build Tool->Maven ->Importing->in this view check the JDK Importer and change the exact version of JDK (example : 1.8.0.250) installed on your machine from the drop-down.
我遇到了同样的错误，我已经修复了它；IntelliJ -> Setting-> Build, Execution, Deployment -> Build Tool->Maven ->Importing->在这个视图中检查JDK Importer并更改安装在您机器上的JDK的确切版本（例如：1.8.0.250）落下。
After doing the same it prompts for verification and after that, the maven will be automatically updated and the project will run.
执行相同操作后，它会提示验证，然后，maven 将自动更新并运行项目。
In my case, I did the same thing as the JDK which is used in the machine is different when the project is imported from a repository. These things happen when we uninstall the IDE and JDK and install the IDE and different version of JDK, The IDE automatically fetch the project which is available in the machine as before but it can not change the imported JDK.
就我而言，当项目从存储库导入时，我做了同样的事情，因为机器中使用的 JDK 不同。当我们卸载IDE和JDK并安装IDE和不同版本的JDK时，IDE会自动获取机器中可用的项目，但无法更改导入的JDK。
