Run sh script with java but it fails without showing the error

Question

I am trying to loop into files, and run the script sh in each file using JAVA.

for (File file : files) {
            if (file.isDirectory()) {           
                    Runtime.getRuntime().exec("cmd.exe /c start "
                             +file.getAbsolutePath()+"\\creationNoPersisWF12.sh");
                        TimeUnit.SECONDS.sleep(1800);}}

The window of the script opens and get closed immediately. However, when I try the execute the scripts sh from outside, they execute successfully.

I need some help please.

are you positive there isn't a stack trace? are you positive that the name of the sh file is correct? — Lena Bru, May 07 '20 at 09:07
yes i'm 100% positive. In fact, it starts the script, but get closed in like 5 seconds. I want to have the stack trace in order to understand the problem but no success. — LSoft, May 07 '20 at 09:10
I tried by using 'Runtime.getRuntime().exec("cmd.exe /c start " +file.getAbsolutePath()+"\\creationNoPersisWF12.sh">>path/logerror.txt); I get the text file but it's empty — LSoft, May 07 '20 at 09:14

score 0 · Answer 1 · answered May 07 '20 at 09:18

0

    Process process = Runtime.getRuntime().exec("cmd.exe /c start "
                             +file.getAbsolutePath()+"\\creationNoPersisWF12.sh");
    if(process.exitValue()!=0){
        throw new RuntimeException(new String(process.getErrorStream().readAllBytes()));
    }

you have to check the exit value and read the error stream for the errors since its a process on its own, it won't throw any error on its own after invoking the process you have to check if it ran successfully with exitvalue 0 or not.

answered May 07 '20 at 09:18

k4vin

1,497
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19

The project won't compile : The method readAllBytes() is undefined for the type InputStream – LSoft May 07 '20 at 09:32
@LSoft readAllBytes is available since Java 9, so it won't be available if you are on java 8 or lower. – lugiorgi May 07 '20 at 09:37
@LSoft https://stackoverflow.com/questions/309424/how-do-i-read-convert-an-inputstream-into-a-string-in-java – lugiorgi May 07 '20 at 09:43
I tried this int exitVal =process.waitFor(); System.out.println("Process exitValue: " + exitVal); The exit value is 1 – LSoft May 07 '20 at 09:45

Run sh script with java but it fails without showing the error

1 Answers1