Redirect sh file out put to file using Runtime.getRuntime().exec

Question

I have tried similar suggestions from stack overflow, still issue persist.

I am executing following command from java

public static void main(String[] args) throws Exception {
        try {
            String line;
            //String[] commandToExecute = {"sh" , "MultiDel_FI.sh", " < abcd.log 2>&1 &"};
            String[] commandToExecute = {"sh" , "MultiDel_FI.sh"};


            Process p = Runtime.getRuntime().exec( commandToExecute );
            p.waitFor();
           BufferedReader reader = new BufferedReader(
                    new InputStreamReader(p.getInputStream()));
            writer = new FileWriter("redirect.log");
            while ((line = reader.readLine()) != null) {
                writer.write(line);
          
        }
            writer.close();
            p.waitFor();
            p.destroy();
        catch (Exception e) {
            // 
        }

MultiDel_FI.sh file is placed on edge node with following content

hadoop fs -rm -R -skipTrash 'hdfs://<path>/abc_767' 'hdfs://<path>/abc_768' 'hdfs://<path>/abc_769' ...........many more records

when I run the code it successfully removes the folders from HDFS location. I need to track the output of the command to identify which folder got deleted successfully and which one is not. I tried various options with bin/sh ,writing inputstream to file, it generates empty file. Any suggestions please?

direct unix command properly redirects output.

sh MultiDel_FI.sh > abcd.log 2>&1

Answer 1

public static void main(String[] args) throws IOException {
        //String[] commandToExecute = {"sh" , "MultiDel_FI.sh"};
        String[] commandToExecute = {"beeline", "--force=true", "-u", "jdbc:hive2://<host>:<port>/<hive database>;ssl=true;user=<user>;password=<pw>", "-f", "ppp1.hql"};
        ProcessBuilder builder = new ProcessBuilder(commandToExecute);
        builder.redirectError(new File("out.txt"));
        builder.redirectOutput(new File("out.txt"));
         builder.start();
    }