The process_report() method is not finishing execution but no error is thrown.

[fradrick]

I have my code below trying to generate a pdf report. It sees as if the jrxml is compiling without issues, however the execution seems to be stuck on the process_report() method.

No error is being thrown, but execution cant complete.

REPORTS_DIR = os.path.join(os.path.abspath(os.path.dirname(__file__)))

def _export_to_excel(self):
    batches = Batch.objects.all()[:50] # get the first 50 records
    batch_items = BatchItem.objects.all()[:50] # get the first 50 records
    json_data = json.dumps({
        "batches": [{'id': str(batch.id)} for batch in batches]
    })
    bytes_data = json_data.encode('utf-8')

    conn = {
        'driver': 'json',
        'data_file': bytes_data,
        'json_query': 'users'
    }

    input_file = os.path.join(REPORTS_DIR, 'batches.jrxml')
    output_file = os.path.join(REPORTS_DIR, 'batches_report')


    pyreportjasper = PyReportJasper()
    print("WE_HAVE_REACHED_THIS_STAGE") # this stage is being reached
    pyreportjasper.config(input_file, output_file, output_formats=['pdf'], db_connection=conn)
    pyreportjasper.process_report()
    print('Process Results: ') # This stage cant be reached
    print(batches_report+'.pdf')


    print("EXPORT_TO_EXCEL CALLED")
    return

This is a django project. Any assistance will be greatly appreciated.