如果我创建一个SBT项目,即使是一个简单的“hello world”,编译(成功)然后执行exec,也会抛出以下错误。原因可能是什么以及如何解决这个问题?
java.lang.ArrayIndexOutOfBoundsException: 0
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at sbt.SimpleProcessBuilder.run(ProcessImpl.scala:381)
at sbt.AbstractProcessBuilder.run(ProcessImpl.scala:130)
at sbt.AbstractProcessBuilder.$bang(ProcessImpl.scala:158)
at sbt.ExecProject$$anonfun$execOut$1.apply(ScalaProject.scala:436)
at sbt.ExecProject$$anonfun$execOut$1.apply(ScalaProject.scala:435)
at sbt.TaskManager$Task.invoke(TaskManager.scala:62)
at sbt.impl.RunTask.doRun$1(RunTask.scala:77)
at sbt.impl.RunTask.runTask(RunTask.scala:85)
at sbt.impl.RunTask.run(RunTask.scala:32)
at sbt.impl.RunTask$.apply(RunTask.scala:17)
at sbt.impl.RunTask$.apply(RunTask.scala:16)
at sbt.Project$class.run(Project.scala:98)
at sbt.Project$class.call(Project.scala:93)
at sbt.BasicScalaProject.call(DefaultProject.scala:21)
at sbt.xMain$$anonfun$7.apply(Main.scala:512)
at sbt.xMain$$anonfun$7.apply(Main.scala:512)
at sbt.xMain.withAction(Main.scala:541)
at sbt.xMain.sbt$xMain$$handleAction(Main.scala:512)
at sbt.xMain.handleCommand(Main.scala:502)
at sbt.xMain.processAction(Main.scala:441)
at sbt.xMain.process$1(Main.scala:257)
at sbt.xMain$Continue$1.apply(Main.scala:132)
at sbt.xMain.run$1(Main.scala:136)
at sbt.xMain.processArguments(Main.scala:266)
at sbt.xMain.startProject(Main.scala:107)
at sbt.xMain.run(Main.scala:84)
at sbt.xMain.run0$1(Main.scala:35)
at sbt.xMain.run(Main.scala:42)
at xsbt.boot.Launch$.run(Launch.scala:53)
at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:42)
at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:42)
at xsbt.boot.Launch$.launch(Launch.scala:57)
at xsbt.boot.Launch$.explicit(Launch.scala:42)
at xsbt.boot.Launch$.initialized(Launch.scala:38)
at xsbt.boot.Launch$.parsed(Launch.scala:31)
at xsbt.boot.Launch$.configured(Launch.scala:21)
at xsbt.boot.Launch$.apply(Launch.scala:16)
at xsbt.boot.Launch$.apply(Launch.scala:13)
at xsbt.boot.Boot$.runImpl(Boot.scala:24)
at xsbt.boot.Boot$.run(Boot.scala:19)
at xsbt.boot.Boot$.main(Boot.scala:15)
at xsbt.boot.Boot.main(Boot.scala)
[info] == exec ==
[error] Error running exec: java.lang.ArrayIndexOutOfBoundsException: 0
答案 0 :(得分:2)
构建操作 exec 的目的是在底层shell上执行命令。因此,需要遵循命令。 EG:
exec killall firefox
在封面下,SBT调用java.lang.ProcessBuilder,如果调用者尝试启动它但未提供任何参数,则会抛出此异常。
IndexOutOfBoundsException - If the command is an empty list (has size 0)
我认为SBT不应传播此异常并且这是一个错误。您应该收到错误消息。
也许您正在寻找构建操作运行,它将调用您的主类。