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 details FAILURE: 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:24 1) 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:24 4) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:21 7) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:33) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22) at org.gradle.launcher.cli.CommandLineActionFactory$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 more Caused 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~