JobService.java

@Override
    public boolean onStartJob(JobParameters jobParameters) {

        Timber.d("In 15 min job check");
        
        //Check if the alarm is scheduled 
        boolean alarmOn = (PendingIntent.getBroadcast(context, REQUEST_CODE, intent, PendingIntent.FLAG_NO_CREATE)) != null);

        if(!alarmOn)
          AlarmScheduler.rescheduleRequiredAlarm();
      
        jobFinished(jobParameters, false);
        return true;
    }