如何强制解释器显示完整的堆栈跟踪？

有什么办法强制Scala解释器（通过SBT启动）打印完整的堆栈跟踪。默认情况下，将显示10行以内：
如何强制解释器显示完整的堆栈跟踪？

scala> new CacheMonitoringClient 
javax.management.InstanceNotFoundException: com.bea:Name=DomainRuntimeService,Type=weblogic.management.beanservers.domainrun 
time.DomainRuntimeServiceMBean 
     at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:195) 
     at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:224) 
     at javax.management.remote.rmi.RMIConnectionImpl_921_WLStub.getAttribute(Unknown Source) 
     at weblogic.management.remote.common.RMIConnectionWrapper$11.run(ClientProviderBase.java:498) 
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363) 
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147) 
     at weblogic.security.Security.runAs(Security.java:61) 
     at weblogic.management.remote.common.RMIConnectionWrapper.getAttribute(ClientProviderBas...

由于我使用try { new CacheMonitoringClient } catch { case ex => ex.printStackTrace}（包装明确抛出我感兴趣的例外调用）一种解决方法，但真难看......

来源

2010-09-22 Vasil Remeniuk

使用lastException如果你想的只有一件事：

scala> 1/0 
java.lang.ArithmeticException:/by zero 
    at .<init>(<console>:12) 
    at .<clinit>(<console>) 
    at RequestResult$.<init>(<console>:9) 
    at RequestResult$.<clinit>(<console>) 
    at RequestResult$scala_repl_result(<console>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.util.control.Exception$Catch.apply(Exception.scala:79) 
    at scal... 
scala> lastException.printStackTrace 
java.lang.ArithmeticException:/by zero 
    at line101$object$$iw$$iw$$iw$$iw$$iw$$iw$.<init>(<console>:12) 
    at line101$object$$iw$$iw$$iw$$iw$$iw$$iw$.<clinit>(<console>) 
    at RequestResult$line101$object$.<init>(<console>:9) 
    at RequestResult$line101$object$.<clinit>(<console>) 
    at RequestResult$line101$object.scala_repl_result(<console>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.util.control.Exception$Catch.apply(Exception.scala:79) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1.apply(Interpreter.scala:980) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1.apply(Interpreter.scala:980) 
    at scala.util.control.Exception$Catch.apply(Exception.scala:79) 
    at scala.tools.nsc.Interpreter$Request.loadAndRun(Interpreter.scala:979) 
    at scala.tools.nsc.Interpreter.loadAndRunReq$1(Interpreter.scala:578) 
    at scala.tools.nsc.Interpreter.interpret(Interpreter.scala:597) 
    at scala.tools.nsc.Interpreter.interpret(Interpreter.scala:575) 
    at scala.tools.nsc.InterpreterLoop.reallyInterpret$1(InterpreterLoop.scala:471) 
    at scala.tools.nsc.InterpreterLoop.interpretStartingWith(InterpreterLoop.scala:514) 
    at scala.tools.nsc.InterpreterLoop.command(InterpreterLoop.scala:361) 
    at scala.tools.nsc.InterpreterLoop.processLine$1(InterpreterLoop.scala:242) 
    at scala.tools.nsc.InterpreterLoop.repl(InterpreterLoop.scala:248) 
    at scala.tools.nsc.InterpreterLoop.main(InterpreterLoop.scala:558) 
    at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:72) 
    at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

或者设置settings.maxPrintString为0，尽管这将改变正常的打印结果了。

scala> settings.maxPrintString = 0 

scala> 1 /0 
java.lang.ArithmeticException:/by zero 
    at .<init>(<console>:12) 
    at .<clinit>(<console>) 
    at RequestResult$.<init>(<console>:9) 
    at RequestResult$.<clinit>(<console>) 
    at RequestResult$scala_repl_result(<console>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1$$anonfun$apply$18.apply(Interpreter.scala:981) 
    at scala.util.control.Exception$Catch.apply(Exception.scala:79) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1.apply(Interpreter.scala:980) 
    at scala.tools.nsc.Interpreter$Request$$anonfun$loadAndRun$1.apply(Interpreter.scala:980) 
    at scala.util.control.Exception$Catch.apply(Exception.scala:79) 
    at scala.tools.nsc.Interpreter$Request.loadAndRun(Interpreter.scala:979) 
    at scala.tools.nsc.Interpreter.loadAndRunReq$1(Interpreter.scala:578) 
    at scala.tools.nsc.Interpreter.interpret(Interpreter.scala:597) 
    at scala.tools.nsc.Interpreter.interpret(Interpreter.scala:575) 
    at scala.tools.nsc.InterpreterLoop.reallyInterpret$1(InterpreterLoop.scala:471) 
    at scala.tools.nsc.InterpreterLoop.interpretStartingWith(InterpreterLoop.scala:514) 
    at scala.tools.nsc.InterpreterLoop.command(InterpreterLoop.scala:361) 
    at scala.tools.nsc.InterpreterLoop.processLine$1(InterpreterLoop.scala:242) 
    at scala.tools.nsc.InterpreterLoop.repl(InterpreterLoop.scala:248) 
    at scala.tools.nsc.InterpreterLoop.main(InterpreterLoop.scala:558) 
    at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:72) 
    at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

来源

2010-09-22 13:40:39

+1，这些REPL提示和技巧是否记录在某处？ – missingfaktor 2010-09-22 19:59:59

@Missing请关注邮件列表和irc上的paulp，他有时会炫耀他实施的一些新技巧。除此之外，只需按下''看看里面有什么，看看实现了什么方法，进入电源模式并重复等等。 – 2010-09-22 22:18:37

你有没有进入控制台前SBT试图

trace on

？ On是默认设置，但也许在您的情况下会被覆盖。

来源

2010-09-22 11:07:25 Synesso

对SBT 0.7.4进行了试验。跟踪开/关没有区别 - 在这两种情况下，堆栈跟踪都会显示和剪切。 – 2010-09-22 11:15:08

是的，只是自己试了一下（不得不先安装）。还尝试了追踪选项，但没有区别。对不起，红鲱鱼。 – Synesso 2010-09-22 11:21:40

我注意到REPL也会截断SBT上下文之外的异常，所以它可能不是SBT这样做的。 – Synesso 2010-09-22 11:32:17

如何强制解释器显示完整的堆栈跟踪？

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