Cannot execute hello world script

[David Pérez]

Dear Scala gurus,

I have written some scripts in Scala.

But now, I cannot even run a hello world script like this:

#!/bin/sh
    exec scala "$0" "$@"
!#
Console.println("Hello, world!")

under Centos 6.2.

I have installed the official rpm for Scala 2.9.2.

Of course, execute permissions are set.

I'm confused because I can run Scala scripts normally in other CentOS 6.2 computer.

The symptomps are that when running from the console, it freezes for ever.

Any idea please?

[David Pérez]

More information:

java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.6) (rhel-1.43.1.10.6.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

I have saved the hello world script to a file called "hello".

It freezes with:

$ ./hello
$ scala hello

[Daniel Sobral]

There are two things you may want to look at. First, `hostname`  must resolve to your host's IP address -- even if it's 127.0.0.1. Second, there may be an fsc daemon running causing the trouble. Try running fsc -shutdown.

--
Daniel C. Sobral

I travel to the future all the time.

[David Pérez]

Thanks Daniel for your hints,

hostname works ok and no fsc daemon was running.

Any more ideas?
Am I the only one having such a basic problem?

---------------------
Saber es poder
        David

2012/11/19 Daniel Sobral <dcso...@gmail.com>

[David Pérez]

Thanks Paul!!!!
It has solved my problem.
I wonder why I do need this parameter in one equipment and don't in other ones.
I think -nc means no compile daemon.  Does it?
Is this a Scala bug or a misconfiguration?.

---------------------
        David

2012/11/19 Paul Phillips <pa...@improving.org>

-nc

[Jason Zaugg]

On Mon, Nov 19, 2012 at 5:32 PM, David Pérez <san...@gmail.com> wrote:

Thanks Paul!!!!
It has solved my problem.
I wonder why I do need this parameter in one equipment and don't in other ones.
I think -nc means no compile daemon.  Does it?
Is this a Scala bug or a misconfiguration?.

The compile daemon is an optimization to make startup of the script faster. But has some known issues on certain systems related to TCP/IP configuration (here's an in-flight attempt to fix one of them [1])

-jason

[1] https://github.com/scala/scala/pull/1646 

[David Pérez]

Found also this problems related to scripts:
http://article.gmane.org/gmane.comp.lang.scala.user/55287

---------------------
Saber es poder
        David

2012/11/19 Jason Zaugg <jza...@gmail.com>