Program: 38112
Project: 38112
Buggy source:
@Override public Response call(){
  Response response=null;
  if (processCommand != null && process != null) {
    Debug.log("String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str");
    process.status=Process.STATUS_STARTED;
    try {
      processCommand.setFilePaths();
    }
 catch (    SQLException|IOException e) {
      Debug.log(e.getMessage());
      ErrorLogger.log(process.author,"String_Node_Str" + e.getMessage());
      process.status=Process.STATUS_CRASHED;
      return null;
    }
    process.outputFiles=processCommand.getFilePaths();
    process.timeStarted=System.currentTimeMillis();
    try {
      response=processCommand.execute();
      if (response.getCode() == HttpStatusCode.CREATED || response.getCode() == HttpStatusCode.OK) {
        process.status=Process.STATUS_FINISHED;
        String successMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str";
        Debug.log(successMsg);
        ErrorLogger.log("String_Node_Str",successMsg);
      }
 else {
        System.out.println("String_Node_Str" + response.getCode());
        process.status=Process.STATUS_CRASHED;
        String crashedMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str";
        Debug.log(crashedMsg);
        ErrorLogger.log("String_Node_Str",crashedMsg);
      }
    }
 catch (    NullPointerException e) {
      process.status=Process.STATUS_CRASHED;
    }
    if (simulateLongProcess) {
      ErrorLogger.log("String_Node_Str","String_Node_Str");
      Debug.log("String_Node_Str" + processCommand.getPID());
      try {
        Thread.sleep(30000);
      }
 catch (      InterruptedException ex) {
        Debug.log("String_Node_Str");
      }
      Debug.log("String_Node_Str" + processCommand.getPID());
    }
    process.timeFinished=System.currentTimeMillis();
    String timeMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ formatTimeDifference((process.timeFinished - process.timeStarted) / 1000);
    Debug.log(timeMsg);
    ErrorLogger.log("String_Node_Str",timeMsg);
  }
  Debug.log("String_Node_Str" + processCommand.getPID());
  Debug.log("String_Node_Str" + ((ProcessResponse)response).getMessage());
  return response;
}

Fixed version (ground truth):
@Override public Response call(){
  Response response=null;
  if (processCommand != null && process != null) {
    Debug.log("String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str");
    process.status=Process.STATUS_STARTED;
    try {
      processCommand.setFilePaths();
    }
 catch (    SQLException|IOException e) {
      Debug.log(e.getMessage());
      ErrorLogger.log(process.author,"String_Node_Str" + e.getMessage());
      process.status=Process.STATUS_CRASHED;
      return null;
    }
    process.outputFiles=processCommand.getFilePaths();
    process.timeStarted=System.currentTimeMillis();
    try {
      response=processCommand.execute();
      if (response.getCode() == HttpStatusCode.CREATED || response.getCode() == HttpStatusCode.OK) {
        process.status=Process.STATUS_FINISHED;
        String successMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str";
        Debug.log(successMsg);
        ErrorLogger.log("String_Node_Str",successMsg);
      }
 else {
        System.out.println("String_Node_Str" + response.getCode());
        process.status=Process.STATUS_CRASHED;
        String crashedMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ processCommand.getExpId()+ "String_Node_Str";
        Debug.log(crashedMsg);
        ErrorLogger.log("String_Node_Str",crashedMsg);
      }
    }
 catch (    NullPointerException e) {
      process.status=Process.STATUS_CRASHED;
    }
    if (simulateLongProcess) {
      ErrorLogger.log("String_Node_Str","String_Node_Str");
      Debug.log("String_Node_Str" + processCommand.getPID());
      try {
        Thread.sleep(30000);
      }
 catch (      InterruptedException ex) {
        Debug.log("String_Node_Str");
      }
      Debug.log("String_Node_Str" + processCommand.getPID());
    }
    process.timeFinished=System.currentTimeMillis();
    String timeMsg="String_Node_Str" + processCommand.getPID() + "String_Node_Str"+ formatTimeDifference((process.timeFinished - process.timeStarted) / 1000);
    Debug.log(timeMsg);
    ErrorLogger.log("String_Node_Str",timeMsg);
  }
  Debug.log("String_Node_Str" + processCommand.getPID());
  Debug.log("String_Node_Str" + response.getMessage());
  return response;
}