I don't think there is anything we can do here. The error message is coming from Windows. If it is JVM, as you suspect, then I suggest filing a bug report with Oracle/OpenJDK.

I tried this sample code on Java 1.7.0_11 and Java 1.7.0_21.

From the JRuby, both of the batch files were executed on 1.7.0_11,

The problem is that on 1.7.0_21 only the first batch file was executed.

The sample code run from the Rakefile is:

desc 'Run batch...'
task :runbatch do |task_name, args|
command = "C:\Users\matthewd\Desktop\tbat.bat && cmd /c start C:\Users\matthewd\Desktop\tbattwo.bat"
system command
end

From a Java standpoint, both of the batch files were executed on 1.7.0_11 and 1.7.0_21

The sample code run from Java is:

import java.util.;
import java.io.;

public class test {

public static void main(String[] args)
{
    try {

        String path = ("cmd /c start C:\\Users\\matthewd\\Desktop\\tbat.bat && cmd /c start C:\\Users\\matthewd\\Desktop\\tbattwo.bat");
        Runtime runtime = Runtime.getRuntime();
        Process p = runtime.exec(path); 
         } 
        catch(IOException ioException) 
        {
                System.out.println(ioException.getMessage());
        }
}

}

Ok, so the problem here is in how we handle running a command line that contains a && when on Windows.

I believe we currently run such code by passing it to cmd /c. Perhaps you can do some investigation from there to see if there's a different way we should run this so it will execute as you expect?

I do not personally have a Windows machine I can investigate this on.

I'd also be interested in whether this works from C Ruby.

The command can be simplified to

"tbat.bat && tbattwo.bat" in the Ruby script and as already mentioned, in Java 1.7.0_11 it executes both batch files, whilst in Java 1.7.0_21 it only executes the first.

As for C Ruby, I ran it on ruby 2.0.0p195 (2013-05-14) [i386-mingw32], and it executed both batch files.

My guess is that Java made some changes in Runtime.exec (http://www.oracle.com/technetwork/java/javase/7u21-relnotes-1932873.html), could this be the source of the problem?

On Thu, Jun 27, 2013 at 2:53 AM, mdeb notifications@github.com wrote:

The command can be simplified to

"tbat.bat && tbattwo.bat" in the Ruby script and as already mentioned, in Java 1.7.0_11 it executes both batch files, whislt in Java 1.7.0_21 it only executes the first.

As for C Ruby, I ran it on ruby 2.0.0p195 (2013-05-14) [i386-mingw32], and it executed both batch files.

My guess is that Java made some changes in Runtime.exec (http://www.oracle.com/technetwork/java/javase/7u21-relnotes-1932873.html), could this be the source of the problem?

That is a strong possibility. Nothing in our process launching logic
would be different between those two Java versions. In any case, we
will have to investigate, since we can't just blame the JDK and not
try to work around it ourselves.

Would it be possible for you to provide Java code that attempts to
launch two scripts in this way, so we can use that as a basis for
investigating a workaround?

• Charlie

The java code I used to launch the two batch files, the command line executed is simplified to "tbat.bat && tbattwo.bat", and this will execute both the batch files.

import java.util.;
import java.io.;

public class test {

public static void main(String[] args)
{
    try
    {
        String path = ("tbat.bat && tbattwo.bat");
        Runtime runtime = Runtime.getRuntime();
        Process p = runtime.exec(path); 
        String s;
        BufferedReader stdout = new BufferedReader (new InputStreamReader(p.getInputStream()));
        while ((s = stdout.readLine()) != null) 
        { 
            System.out.println(s); 
        }
    } 
    catch(Exception e) 
    {
        e.printStackTrace();
    }   
}

}

Does this gist represent the issue?
https://gist.github.com/olleolleolle/751fb332954c59dc895735f7f6d420b9

I ran that like this: java -jar jruby-complete-1.7.27.jar -Srake runbatch - and it ran both commands.

(tbattwo.bat is run inside a new shell. That's what cmd \c start does, I take it.)

(Windows 10 Enterprise 2016 LTSB. Version 1607. Os Build: 14393.2007. 64-bit.)

C:\Users\olle\Downloads\download>java -version
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) Client VM (build 25.151-b12, mixed mode, sharing)

@olleolleolle So maybe this is no longer an issue? It has been sitting on the shelf for a long time.

@headius For me, with the situation above, it worked.

I think it's fair to close this issue.