Program: 51754
Project: 51754
Buggy source:
protected String executeCommand(String executionString){
  String response="String_Node_Str";
  if (logger.isLoggable(Level.FINEST)) {
    logger.finest("String_Node_Str" + executionString);
  }
  ProcessBuilder pb=new ProcessBuilder("String_Node_Str","String_Node_Str",executionString);
  pb.redirectErrorStream(true);
  int shellExitStatus=0;
  try {
    final Process shell=pb.start();
    final InputStream shellStream=shell.getInputStream();
    Callable<Integer> call=new Callable<Integer>(){
      public Integer call() throws Exception {
        shell.waitFor();
        return shell.exitValue();
      }
    }
;
    Callable<String> readOutput=new Callable<String>(){
      public String call() throws Exception {
        String output="String_Node_Str";
        String line="String_Node_Str";
        InputStreamReader isr=new InputStreamReader(shellStream);
        BufferedReader reader=new BufferedReader(isr);
        while ((line=reader.readLine()) != null)         output+=line + "String_Node_Str";
        return output;
      }
    }
;
    ExecutorService service=Executors.newSingleThreadExecutor();
    try {
      Future<Integer> ft=service.submit(call);
      Future<String> outputThread=service.submit(readOutput);
      try {
        shellExitStatus=ft.get(getCommandTimeout(),TimeUnit.MILLISECONDS);
      }
 catch (      TimeoutException ex) {
        shell.destroy();
        shellExitStatus=-5;
      }
catch (      ExecutionException e) {
        shell.destroy();
        shellExitStatus=-5;
      }
      try {
        response=outputThread.get(getCommandTimeout(),TimeUnit.MILLISECONDS);
      }
 catch (      Exception ex) {
        logger.log(Level.WARNING,"String_Node_Str",ex);
      }
    }
  finally {
      service.shutdown();
    }
  }
 catch (  IOException e) {
    logger.log(Level.WARNING,"String_Node_Str" + executionString,e);
  }
catch (  InterruptedException e) {
    logger.log(Level.WARNING,"String_Node_Str" + executionString,e);
  }
  if (shellExitStatus != 0) {
    if (shellExitStatus == -5) {
      logger.log(Level.WARNING,"String_Node_Str" + shellExitStatus,executionString);
    }
 else {
      logger.log(Level.WARNING,"String_Node_Str" + shellExitStatus,executionString);
    }
  }
  return response;
}

Fixed version (ground truth):
protected String executeCommand(String executionString){
  String response="String_Node_Str";
  if (logger.isLoggable(Level.FINEST)) {
    logger.finest("String_Node_Str" + executionString);
  }
  ProcessBuilder pb=new ProcessBuilder("String_Node_Str","String_Node_Str",executionString);
  pb.redirectErrorStream(true);
  int shellExitStatus=0;
  try {
    final Process shell=pb.start();
    final InputStream shellStream=shell.getInputStream();
    Callable<Integer> call=new Callable<Integer>(){
      public Integer call() throws Exception {
        shell.waitFor();
        return shell.exitValue();
      }
    }
;
    Callable<String> readOutput=new Callable<String>(){
      public String call() throws Exception {
        String output="String_Node_Str";
        String line="String_Node_Str";
        InputStreamReader isr=new InputStreamReader(shellStream);
        BufferedReader reader=new BufferedReader(isr);
        while ((line=reader.readLine()) != null)         output+=line + "String_Node_Str";
        return output;
      }
    }
;
    ExecutorService service=Executors.newSingleThreadExecutor();
    try {
      Future<String> outputThread=service.submit(readOutput);
      Future<Integer> ft=service.submit(call);
      try {
        shellExitStatus=ft.get(getCommandTimeout(),TimeUnit.MILLISECONDS);
      }
 catch (      TimeoutException ex) {
        shell.destroy();
        shellExitStatus=-5;
      }
catch (      ExecutionException e) {
        shell.destroy();
        shellExitStatus=-5;
      }
      try {
        response=outputThread.get(getCommandTimeout(),TimeUnit.MILLISECONDS);
      }
 catch (      Exception ex) {
        logger.log(Level.WARNING,"String_Node_Str",ex);
      }
    }
  finally {
      service.shutdown();
    }
  }
 catch (  IOException e) {
    logger.log(Level.WARNING,"String_Node_Str" + executionString,e);
  }
catch (  InterruptedException e) {
    logger.log(Level.WARNING,"String_Node_Str" + executionString,e);
  }
  if (shellExitStatus != 0) {
    if (shellExitStatus == -5) {
      logger.log(Level.WARNING,"String_Node_Str" + shellExitStatus,executionString);
    }
 else {
      logger.log(Level.WARNING,"String_Node_Str" + shellExitStatus,executionString);
    }
  }
  return response;
}