Completely remove Scala for a totally clean re-installation.

[Gavin Baumanis]

Hi Everyone,

I posted to the Scalatest mailing list as I am currentl yhaving an issue with getting tests to run correctly.

I get a weird java error - and I am not a java develoepr so have no idea.

Most of my issues are because I am not a Java developer, first - so things a java dev would inherently know to check - I am practically clueless!

So - 

I'll try and give you all the details...

iMac - Used by the whole family on and off - despite everyone else having a laptop of their own, too)

(so I can't just do a reinstall and start all over again - which I would normally do - on my own machine)

Mac OSX : 10.10.5 - no updates available.

I have java 1.7 JDK  installed.

Did an update to thje latest (got a pop-up to tell me there was an update - so I did as asked! and now have build 1.7.0_45-b18 )

Now the java update could well be completely unrelated - but I thought I would mention it just in case.

Also - because I am convalescing at the moment - I am not permanently on the machine - and because it is shared - I can't give any definite details like;

* it was working...

* did XXX - then it didn't work.

So what I did was;

Downloaded the latest (full) version of activator 1.3.5

Deleted the version I had installed (1.2.something )

placed the contents of 1.3.5 where 1.2 resided.

I can successfully compile and run my application that I using to try and learn Scala / Akka / Play against.

But when I run activator test, I get an error message - which I will add at the bottom of this message.

(I have already posted to the scalatest mailing test - but am not getting any help there - I completely understand that the issue might not be resolvable)

Anyway : so what I wanted to do was completely uninstall everything that was Scala related and start all over again.

I deleted the following folders;

* Where Scala was copied to (/Library/Scala/Activator)

* ~/.ivy2/

* ~/.sbt/

* ~/.scala_history

Then I reinstalled Scala, compiled the app (went through the painful experience of having to "resolve" dependencies)

activator compile run (works all fine and dandy )

activator test still throws the same error.

(I have restarted the machine a few times - too - just to rule out temporary gremlins)

I just wanted to check if there was anything I missed in the uninstall / directory deleting - so that I can try again, please.

As always - Thanks - and the error I get when testing is below!

The error actually reads like a DNS error - but everything "seems" to be working network-wise.

I can browse sites on the internet / ping etc... so I really am lost...

ava.net.UnknownHostException: iMac.local: iMac.local: nodename nor servname provided, or not known

at java.net.InetAddress.getLocalHost(InetAddress.java:1473)

at sbt.JUnitXmlTestsListener.<init>(JUnitXmlTestsListener.scala:18)

at sbt.plugins.JUnitXmlReportPlugin$$anonfun$projectSettings$1.apply(JUnitXmlReportPlugin.scala:27)

at sbt.plugins.JUnitXmlReportPlugin$$anonfun$projectSettings$1.apply(JUnitXmlReportPlugin.scala:27)

at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)

at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)

at sbt.std.Transform$$anon$4.work(System.scala:64)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)

at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)

at sbt.Execute.work(Execute.scala:244)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)

at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)

at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:744)

Caused by: java.net.UnknownHostException: iMac.local: nodename nor servname provided, or not known

at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)

at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)

at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)

at java.net.InetAddress.getLocalHost(InetAddress.java:1469)

at sbt.JUnitXmlTestsListener.<init>(JUnitXmlTestsListener.scala:18)

at sbt.plugins.JUnitXmlReportPlugin$$anonfun$projectSettings$1.apply(JUnitXmlReportPlugin.scala:27)

at sbt.plugins.JUnitXmlReportPlugin$$anonfun$projectSettings$1.apply(JUnitXmlReportPlugin.scala:27)

at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)

at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)

at sbt.std.Transform$$anon$4.work(System.scala:64)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)

at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)

at sbt.Execute.work(Execute.scala:244)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)

at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)

at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:744)

[error] (*:testListeners) java.net.UnknownHostException: iMac.local: iMac.local: nodename nor servname provided, or not known

[Jason Zaugg]

On Tue, Aug 25, 2015 at 2:00 PM Gavin Baumanis <gavinb...@gmail.com> wrote:

Hi Everyone,

I posted to the Scalatest mailing list as I am currentl yhaving an issue with getting tests to run correctly.

I get a weird java error - and I am not a java develoepr so have no idea.

Most of my issues are because I am not a Java developer, first - so things a java dev would inherently know to check - I am practically clueless!

So - 

I'll try and give you all the details...

iMac - Used by the whole family on and off - despite everyone else having a laptop of their own, too)

(so I can't just do a reinstall and start all over again - which I would normally do - on my own machine)

Mac OSX : 10.10.5 - no updates available.

I have java 1.7 JDK  installed.

Did an update to thje latest (got a pop-up to tell me there was an update - so I did as asked! and now have build 1.7.0_45-b18 )

The latest build of JDK 7 is 1.7.0_80 (download site). This version supposedly included a fix for JDK-8026245 which might be causing your headaches.

In any case, Java 7 is at end-of-life status, so Oracle will only ship updates to paying customers. You should consider switching to Java 8.

-jason

[Gavin Baumanis]

Thanks Jason!

I downloaded / installed the 1.8 JDK.

Confirnmed that terminal was using the new location for JAVA_HOME.

Retried - all was good in the world!

Thanks very much!

Gavin.

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