Can't run shell script to save my life

Question

Hello,
I have a shell script which I need Java to start. When I pass the parameters in Java I get an exit value of 2. I never set an exit/error value of 2 in my code. What is even more strange, is that when I run the exact same strings I use in the processCommands array, the shell script starts and complete just fine. I have even tried commenting out getting the exitValue just in case my little script wasn't completely done.
Here is the code.
                ArrayList<String> processCommands = new ArrayList<String>();
                processCommands.add(processorString);
                processCommands.add(dropboxString);
                processCommands.add(name);
                for (String string : processCommands)
                    System.out.print(string + " ");
                System.out.println("");
                ProcessBuilder processor = new ProcessBuilder();
                processor.command(processCommands);
                Process ProcessPdf = null;
                ProcessPdf = processor.start();
                ProcessPdf.waitFor();
                int exitValue = ProcessPdf.exitValue();
                System.out.println("Exit Value: " + String.valueOf(exitValue));The input I am working with is:
//home//adynammic//userfiles//demo//dropbox//process.sh
//home//adynammic//userfiles//demo//dropbox
s5.pdf
The shell script even runs from the command line with all the extra slashes. I am running an Ubuntu system if that helps.
Your help is greatly appreciated,
Chem E

Answer 1

There are a number of things that can be going wrong.
First, get rid of the extra slashes. They're probably not causing a problem, but there's no need for them, and we might as well eliminate that variable.
Is that shell script executable by the user that's running your Java code?
Does the shell script start with a line like
#!/bin/shwhere /bin/sh is the full path to a valid shell such as bash, zsh, tcsh, etc.?
Is that shell listed in /etc/shells?
(Yes, I know, since it works from the command line, this stuff shouldn't be an issue, but, again, let's eliminate variables, just to be sure.)
Does that script assume some environment variables or pwd that might not be present when running from your Java code?
Which of those 3 commands gives the exit status of 2? Start with just one of them, and don't add the others until you get that one working.