Exception in thread "main" java.lang.InternalError: Launching execution engine threw: Failed remote launch: com.sun.jdi.CommandLineLaunch (defaults: home=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home, options=, main=, suspend=true, quote=", vmexec=java) -- {home=home=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home, options=options=, main=main=jdk.internal.jshell.remote.RemoteAgent 57696, suspend=suspend=true, quote=quote=", vmexec=vmexec=java}
at jdk.jshell.JShell.executionControl(jdk.jshell@9-ea/JShell.java:714)
at jdk.jshell.Unit.classesToLoad(jdk.jshell@9-ea/Unit.java:275)
at jdk.jshell.Eval.lambda$compileAndLoad$15(jdk.jshell@9-ea/Eval.java:580)
at java.util.stream.ReferencePipeline$7$1.accept(java.base@9-ea/ReferencePipeline.java:269)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(java.base@9-ea/ArrayList.java:1477)
at java.util.stream.AbstractPipeline.copyInto(java.base@9-ea/AbstractPipeline.java:484)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(java.base@9-ea/AbstractPipeline.java:474)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(java.base@9-ea/ReduceOps.java:913)
at java.util.stream.AbstractPipeline.evaluate(java.base@9-ea/AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(java.base@9-ea/ReferencePipeline.java:511)
at jdk.jshell.Eval.compileAndLoad(jdk.jshell@9-ea/Eval.java:581)
at jdk.jshell.Eval.declare(jdk.jshell@9-ea/Eval.java:441)
1 127.0.0.1 Hais-MacBook-Pro
at jdk.jshell.Eval.processMethod(jdk.jshell@9-ea/Eval.java:372)
at jdk.jshell.Eval.eval(jdk.jshell@9-ea/Eval.java:127)
at jdk.jshell.JShell.eval(jdk.jshell@9-ea/JShell.java:393)
at jdk.internal.jshell.tool.JShellTool.processCompleteSource(jdk.jshell@9-ea/JShellTool.java:2114)
at jdk.internal.jshell.tool.JShellTool.processSource(jdk.jshell@9-ea/JShellTool.java:2102)
at jdk.internal.jshell.tool.JShellTool.processSourceCatchingReset(jdk.jshell@9-ea/JShellTool.java:789)
at jdk.internal.jshell.tool.JShellTool.run(jdk.jshell@9-ea/JShellTool.java:769)
at jdk.internal.jshell.tool.JShellTool.startUpRun(jdk.jshell@9-ea/JShellTool.java:706)
at jdk.internal.jshell.tool.JShellTool.resetState(jdk.jshell@9-ea/JShellTool.java:663)
at jdk.internal.jshell.tool.JShellTool.start(jdk.jshell@9-ea/JShellTool.java:483)
at jdk.internal.jshell.tool.JShellTool.start(jdk.jshell@9-ea/JShellTool.java:462)
at jdk.internal.jshell.tool.JShellTool.main(jdk.jshell@9-ea/JShellTool.java:452)
Caused by: java.lang.InternalError: Failed remote launch: com.sun.jdi.CommandLineLaunch (defaults: home=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home, options=, main=, suspend=true, quote=", vmexec=java) -- {home=home=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home, options=options=, main=main=jdk.internal.jshell.remote.RemoteAgent 57696, suspend=suspend=true, quote=quote=", vmexec=vmexec=java}
at jdk.internal.jshell.jdi.JDIConnection.reportLaunchFail(jdk.jshell@9-ea/JDIConnection.java:353)
at jdk.internal.jshell.jdi.JDIConnection.launchTarget(jdk.jshell@9-ea/JDIConnection.java:319)
at jdk.internal.jshell.jdi.JDIConnection.open(jdk.jshell@9-ea/JDIConnection.java:120)
at jdk.internal.jshell.jdi.JDIEnv.init(jdk.jshell@9-ea/JDIEnv.java:49)
at jdk.internal.jshell.jdi.JDIExecutionControl.jdiGo(jdk.jshell@9-ea/JDIExecutionControl.java:425)
at jdk.internal.jshell.jdi.JDIExecutionControl.start(jdk.jshell@9-ea/JDIExecutionControl.java:95)
at jdk.jshell.JShell.executionControl(jdk.jshell@9-ea/JShell.java:712)
... 23 more
Caused by: com.sun.jdi.connect.VMStartException: VM initialization failed for: /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin/java -Xdebug -Xrunjdwp:transport=dt_socket,address=Hais-MacBook-Pro:57697,suspend=y jdk.internal.jshell.remote.RemoteAgent 57696
at com.sun.tools.jdi.AbstractLauncher$Helper.launchAndAccept(jdk.jdi@9-ea/AbstractLauncher.java:193)
at com.sun.tools.jdi.AbstractLauncher.launch(jdk.jdi@9-ea/AbstractLauncher.java:132)
at com.sun.tools.jdi.SunCommandLineLauncher.launch(jdk.jdi@9-ea/SunCommandLineLauncher.java:225)
at jdk.internal.jshell.jdi.JDIConnection.launchTarget(jdk.jshell@9-ea/JDIConnection.java:312)
... 28 more
https://bugs.openjdk.java.net/browse/JDK-8131029
这个问题在新版的已经被修复了，但是如果碰到了，可以修改 /etc/hosts 来绕过(增加一个本地计算机名字的 loop ip)
本地计算机名字可以用
uname -n
来查看
参考这个文章找到的 workaround