問(wèn)題：idea 報(bào)的錯(cuò)誤日志
java.lang.RuntimeException: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection refused: connect
at com.intellij.util.ExceptionUtil.rethrowAllAsUnchecked(ExceptionUtil.java:186)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl$2.fun(Maven3ServerEmbedderImpl.java:590)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl$2.fun(Maven3ServerEmbedderImpl.java:583)
at com.intellij.util.containers.ContainerUtil.mapNotNull(ContainerUtil.java:1913)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.resolveProject(Maven3ServerEmbedderImpl.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:346)
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$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:276)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:253)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:162)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
at com.sun.proxy.$Proxy139.resolveProject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:175)
at com.intellij.execution.rmi.RemoteUtil.access$300(RemoteUtil.java:36)
at com.intellij.execution.rmi.RemoteUtil$2$1$1.compute(RemoteUtil.java:156)
at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:232)
at com.intellij.execution.rmi.RemoteUtil$2$1.invoke(RemoteUtil.java:153)
at com.sun.proxy.$Proxy139.resolveProject(Unknown Source)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper$5.execute(MavenEmbedderWrapper.java:125)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper$5.execute(MavenEmbedderWrapper.java:121)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:89)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.resolveProject(MavenEmbedderWrapper.java:121)
at org.jetbrains.idea.maven.project.MavenProjectReader.resolveProject(MavenProjectReader.java:491)
at org.jetbrains.idea.maven.project.MavenProjectsTree.doResolve(MavenProjectsTree.java:1276)
at org.jetbrains.idea.maven.project.MavenProjectsTree.resolve(MavenProjectsTree.java:1248)
at org.jetbrains.idea.maven.project.MavenProjectsProcessorResolvingTask.perform(MavenProjectsProcessorResolvingTask.java:44)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:132)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.access$000(MavenProjectsProcessor.java:32)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor$2.run(MavenProjectsProcessor.java:107)
at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$5(MavenUtil.java:460)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:343)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
at com.sun.proxy.$Proxy2.info(Unknown Source)
at org.jetbrains.idea.maven.server.MavenServerLoggerWrapper.info(MavenServerLoggerWrapper.java:28)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.validate(Maven3ServerEmbedderImpl.java:977)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.createExecutionResult(Maven3ServerEmbedderImpl.java:924)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.access$100(Maven3ServerEmbedderImpl.java:121)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl$2.fun(Maven3ServerEmbedderImpl.java:587)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl$2.fun(Maven3ServerEmbedderImpl.java:583)
at com.intellij.util.containers.ContainerUtil.mapNotNull(ContainerUtil.java:1913)
at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.resolveProject(Maven3ServerEmbedderImpl.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:346)
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$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$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:748)
解決過(guò)程
根據(jù)提示，去查log，在idea的help菜單下點(diǎn)擊show log in finder,打開(kāi)日志一看，看到j(luò)ava.net.ConnectException: Connection refused?那就是連不上網(wǎng)呀，查看了網(wǎng)絡(luò)，都是ok的，沒(méi)毛?。?/p>
再往下看日志，java.rmi.RemoteException: Cannot start maven service; nested exception is:?
java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:?
java.net.ConnectException: Connection refused?
，發(fā)現(xiàn)maven去請(qǐng)求localhost了，而且連接不上,那就直接ping localhost，竟然ping通/不通
立馬查下hosts文件，發(fā)現(xiàn)localhost 沒(méi)有 對(duì)應(yīng)到127.0.0.1 或者 不在hosts里
加上localhost的映射，再試一把，worked
