Gradle报错：java.io.IOException: Unable to establish loopback connection

先说下问题原因：
总结起来就是jvm无法访问127.0.0.1
有可能出现的情况：

• 1.java被禁网了。。。。我就是这样浪费了三天时间
• 2.防火墙问题
• 3.ipv6的问题
  
  • …其他的反正跟网络有关的问题

错误信息大概如下

Starting a Gradle Daemon, 1 incompatible and 1 stopped Daemons could not be reused, use --status for detailsFAILURE: Build failed with an exception.* What went wrong:java.io.IOException: Unable to establish loopback connection* Try:Run with --info or --debug option to get more log output.* Exception is:org.gradle.api.UncheckedIOException: java.io.IOException: Unable to establish loopback connection        at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:43)        at org.gradle.internal.remote.internal.inet.SocketConnection.<init>(SocketConnection.java:60)        at org.gradle.internal.remote.internal.inet.SocketConnectCompletion.create(SocketConnectCompletion.java:39)        at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connectToDaemon(DefaultDaemonConnector.java:255)        at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connectToDaemonWithId(DefaultDaemonConnector.java:241)        at org.gradle.launcher.daemon.client.DefaultDaemonConnector.startDaemon(DefaultDaemonConnector.java:213)        at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connect(DefaultDaemonConnector.java:130)        at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:127)        at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:81)        at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:51)        at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:173)        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:244)        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:217)        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:33)        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:210)        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:174)        at org.gradle.launcher.Main.doAction(Main.java:33)        at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)        at java.lang.reflect.Method.invoke(Method.java:498)        at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:60)        at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:37)        at org.gradle.launcher.GradleMain.main(GradleMain.java:23)Caused by: java.io.IOException: Unable to establish loopback connection        at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:94)        at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:61)        at java.security.AccessController.doPrivileged(Native Method)        at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:171)        at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)        at java.nio.channels.Pipe.open(Pipe.java:155)        at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)        at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)        at java.nio.channels.Selector.open(Selector.java:227)        at org.gradle.internal.remote.internal.inet.SocketConnection$SocketInputStream.<init>(SocketConnection.java:142)        at org.gradle.internal.remote.internal.inet.SocketConnection.<init>(SocketConnection.java:58)        ... 26 moreCaused by: java.io.IOException: 远程主机强迫关闭了一个现有的连接。        at sun.nio.ch.SocketDispatcher.read0(Native Method)        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)        at sun.nio.ch.IOUtil.read(IOUtil.java:197)        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)        at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:137)        at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:76)        ... 36 more

总结：有时候过得太仔细不一定是什么好事~
好了 要去补上三天的工作了~