[Scilab-users] Scilab 6.0 + starting a new jvm + evstr('1+1; ') => crash

[Michael Benguigui]

Hi all,

I managed to make a simpler program to reproduce the pb. Here it is

A java class:

public class MyEchoClass {
      public static void execEcho () throws IOException {
        ArrayList<String> cmd = new ArrayList<String>();
        cmd.add("echo");
        cmd.add("\"AAAA\"");
        ProcessBuilder pb = new ProcessBuilder(cmd);
        pb.start();
    }
}

In Scilab:

jinvoke(MyEchoClass,'execEcho');
disp('before...');
evstr('1+1;');
disp('...after');

The result:

before...
[image: Images intégrées 1]

Regards
Michael

2017-03-03 20:20 GMT+01:00 Samuel Gougeon <sgougeon at free.fr>:

> Hello Michael,
>
> Again, it is hard or even impossible to help or/and debug without having
> any true complete (and if possible minimal) way to run an actual code and
> reproduce the issue.
>
> Le 03/03/2017 à 14:40, Michael Benguigui a écrit :
>
> Hi all,
> As a Scilab user, i am facing difficulties during the Scilab
> 6 adaptation of my project. I did my best to isolate the pb. This code
> works with Scilab 5.5. At some point of my code, I have:
>
> >pair = jinvoke(deployer,'deployOrLookup');
> >evstr('1+1');// crash!
> >// or
> >// deff('[x]=myplus(y,z)','x=y+z') // crash!
>
> Important points:
> - The common point of evstr and deff is it calls the scilab compiler.
> - deployOrLookup() calls a java method using jinvoke(), which creates a
> java Process (Process process = pb.start(); ) that executes another java
> class
> (cmd like java -Djava.security.policy=xxx -Dlog4j.configuration=xx
> -Drmi.port=xxx myClass).
> - If the jvm already exists, deployOrLookup() does not create it again,
> but just registers it..
>
>
> Either you can provide this code, or you provide an equivalent public one
> with which you get the same issue, in a way we can copy/paste it in the
> console with all the required context (so lines of codes without any
> leading prompts -->).
> Otherwise, nothing prevents thinking that the issue is possibly in the
> private code or in the private context instead of in Scilab itself.
>
> By the way, if your prompt was really ">" instead of "-->", you were not
> at the top level, and something else could be wrong out of jinvoke, evstr
> or deff)
>
> For my part, i do not get any crash running
> jimport java.lang.System;
> jimport java.awt.Color;
> jimport java.lang.String;
> // Non-static methods
> jinvoke("Hello World !!", "length");
> evstr('1+1');// crash!
> deff('[x]=myplus(y,z)','x=y+z')
>
> as coming from the first example of the jinvoke() help page.
>
> Regards
> Samuel
>
>
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>


-- 
Michael Benguigui, Activeeon
+33 6 304 37 37 0
https://fr.linkedin.com/in/micha%C3%ABl-benguigui-23a85921
skype: michael.benguigui at hotmail.fr
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