Intellij Idea Maven 'cannot reconnect‘错误

Question

也许你可以帮助我，当我在Intellij Idea 13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External libraries部分没有库。在来自diff模块的所有pom.xml文件中，我看到错误“无法重新连接”。

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我尝试无效缓存/重启的想法，尝试使用Maven重新导入，但问题仍然存在。但是，如果我做mvn干净安装，并部署我的项目，一切都很好。我使用Maven 3.2.3。和Java 1.8。

Maven设置：

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Aded 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.access$100(MavenProjectsProcessor.java:28)
    at org.jetbrains.idea.maven.project.MavenProjectsProcessor$2.run(MavenProjectsProcessor.java:107)
    at org.jetbrains.idea.maven.utils.MavenUtil$6.run(MavenUtil.java:440)
    at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:419)
    at java.util.concurrent.Executors$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$1$1.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$1.run(Transport.java:200)
    at sun.rmi.transport.Transport$1.run(Transport.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$254(TCPTransport.java:683)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/99407688.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.tcp.TCPTransport$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$2$1$1.compute(RemoteUtil.java:106)
    at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:167)
    at com.intellij.execution.rmi.RemoteUtil$2$1.invoke(RemoteUtil.java:102)
    at com.sun.proxy.$Proxy121.resolveProject(Unknown Source)
    at org.jetbrains.idea.maven.server.MavenEmbedderWrapper$4.execute(MavenEmbedderWrapper.java:100)
    at org.jetbrains.idea.maven.server.MavenEmbedderWrapper$4.execute(MavenEmbedderWrapper.java:97)
    at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:89)
    ... 16 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
    at org.apache.maven.wagon.providers.file.FileWagon.resolveDestinationPath(FileWagon.java:206)
    at org.apache.maven.wagon.providers.file.FileWagon.resourceExists(FileWagon.java:265)
    at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:577)
    at org.sonatype.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:60)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$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) 

Answer 1

我遇到了同样的错误，并像这样修复了它：

按Ctrl+Alt+S键打开

1. 设置，然后导航到Ctrl+Alt+S构建、执行、部署|构建工具| Maven |

1. 检查JDK Importer，然后从下拉菜单中更改安装在计算机上的JDK的确切版本(例如: 1.8.0.250)。

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在执行相同的操作后，它会提示进行验证，之后，maven将自动更新，项目将运行。

在我的例子中，我做了与JDK相同的事情，当项目从存储库导入时，机器中使用的JDK是不同的。当我们卸载IDE和JDK并安装IDE和不同版本的JDK时，这些事情就会发生，IDE会像以前一样自动获取机器上可用的项目，但它不能更改导入的JDK。

Answer 2

我把本地的Maven 3.3.9改成了Idea包Maven3，修复了这个问题。

Answer 3

在这种情况下，单击Reload All Maven Projects对我很有帮助。

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