Maven下载sources时报错java.lang.RuntimeException: Cannot reconnect

1 报错信息

大致报错背景如下:

可以正常导入和更新依赖
maven更改过阿里镜像
下载sources会报错，具体堆栈信息如下

java.lang.RuntimeException: Cannot reconnect.at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:82)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.customizeForResolve(MavenEmbedderWrapper.java:38)at org.jetbrains.idea.maven.project.MavenProjectResolver.downloadSourcesAndJavadocs(MavenProjectResolver.java:253)at org.jetbrains.idea.maven.project.MavenProjectsProcessorArtifactsDownloadingTask.perform(MavenProjectsProcessorArtifactsDownloadingTask.java:40)at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:146)at org.jetbrains.idea.maven.project.MavenProjectsProcessor$1.run(MavenProjectsProcessor.java:115)at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$5(MavenUtil.java:518)at com.intellij.util.RunnableCallable.call(RunnableCallable.java:20)at com.intellij.util.RunnableCallable.call(RunnableCallable.java:11)at com.intellij.openapi.application.impl.ApplicationImpl$1.call(ApplicationImpl.java:270)at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)at java.base/java.security.AccessController.doPrivileged(Native Method)at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused: connectat java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:623)at java.rmi/sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:209)at java.rmi/sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:196)at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:132)at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:217)at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:162)at com.sun.proxy.$Proxy157.createEmbedder(Unknown Source)at jdk.internal.reflect.GeneratedMethodAccessor1731.invoke(Unknown Source)at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.base/java.lang.reflect.Method.invoke(Method.java:566)at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:150)at com.intellij.execution.rmi.RemoteUtil.access$400(RemoteUtil.java:21)at com.intellij.execution.rmi.RemoteUtil$1.lambda$invoke$0(RemoteUtil.java:134)at com.intellij.openapi.util.ClassLoaderUtil.computeWithClassLoader(ClassLoaderUtil.java:31)at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:202)at com.intellij.execution.rmi.RemoteUtil$1.invoke(RemoteUtil.java:134)at com.sun.proxy.$Proxy157.createEmbedder(Unknown Source)at org.jetbrains.idea.maven.server.MavenServerConnector.createEmbedder(MavenServerConnector.java:191)at org.jetbrains.idea.maven.server.MavenServerManager$2.create(MavenServerManager.java:344)at org.jetbrains.idea.maven.server.MavenServerManager$2.create(MavenServerManager.java:332)at org.jetbrains.idea.maven.server.RemoteObjectWrapper.getOrCreateWrappee(RemoteObjectWrapper.java:41)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.doCustomize(MavenEmbedderWrapper.java:79)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.lambda$customizeForResolve$0(MavenEmbedderWrapper.java:39)at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:76)... 17 more
Caused by: java.net.ConnectException: Connection refused: connectat java.base/java.net.PlainSocketImpl.connect0(Native Method)at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101)at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)at java.base/java.net.Socket.connect(Socket.java:609)at java.base/java.net.Socket.connect(Socket.java:558)at java.base/java.net.Socket.<init>(Socket.java:454)at java.base/java.net.Socket.<init>(Socket.java:231)at com.intellij.execution.rmi.RemoteServer$1.createSocket(RemoteServer.java:122)at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:617)... 40 more

2 解决办法

1.添加参数-Djava.net.preferIPv4Stack=true
2.更改JDK为JDK 1.8

具体原因还不清楚，不过添加这参数之后可以解决问题.解决办法是参考开源中国问答得到的，感兴趣可以再看看这篇问答

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Maven下载sources时报错java.lang.RuntimeException: Cannot reconnect

1 报错信息

2 解决办法

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