Program: 87149
Project: 87149
Buggy source:
@Override public void setSendingResult(QueueInfo qi){
  final Session session=sessionManager.open();
  Transaction tx=session.beginTransaction();
  try {
    Long id=Long.parseLong(qi.getMailid());
    EmailItem i=(EmailItem)session.get(EmailItem.class,id);
    if (i == null) {
      return;
    }
    log.info("String_Node_Str" + i.getRecipientAddress() + "String_Node_Str"+ i.getNumAttempts()+ "String_Node_Str"+ i.getId());
    log.info("String_Node_Str" + qi.getResultInfo() + "String_Node_Str"+ qi.getState());
    EmailSendAttempt a=new EmailSendAttempt();
    a.setEmailItem(i);
    a.setStatus(qi.getResultInfo());
    a.setStatusDate(currentDateService.getNow());
    session.save(a);
    i.setSendStatusDate(currentDateService.getNow());
    String sStatus=qi.getResultInfo();
    Integer status=SmtpUtils.getStatusCode(sStatus);
    if (status != null && (status >= 200 || status < 300)) {
      System.out.println("String_Node_Str");
      i.setSendStatus("String_Node_Str");
    }
 else {
      long tm=currentDateService.getNow().getTime();
      tm=tm + retryIntervalMs;
      Date retryDate=new Date(tm);
      int attempts=0;
      if (i.getNumAttempts() != null) {
        attempts=i.getNumAttempts();
      }
      if (attempts >= maxAttempts) {
        i.setSendStatus("String_Node_Str");
        log.warn("String_Node_Str" + attempts + "String_Node_Str"+ i.getId());
      }
 else {
        attempts++;
        i.setNextAttempt(retryDate);
        i.setNumAttempts(attempts);
        i.setSendStatus("String_Node_Str");
        log.warn("String_Node_Str" + attempts + "String_Node_Str"+ i.getId());
      }
    }
    session.save(i);
    log.info("String_Node_Str");
    BaseEmailJob job=i.getJob();
    if (job != null) {
      log.info("String_Node_Str");
      job.accept(new AbstractEmailJobVisitor(){
        @Override public void visit(        GroupEmailJob r){
          Date now=currentDateService.getNow();
          r.checkStatus(now,session);
        }
      }
);
    }
 else {
      log.info("String_Node_Str");
    }
    tx.commit();
  }
  finally {
    sessionManager.close();
  }
}

Fixed version (ground truth):
@Override public void setSendingResult(QueueInfo qi){
  final Session session=sessionManager.open();
  Transaction tx=session.beginTransaction();
  try {
    Long id=Long.parseLong(qi.getMailid());
    EmailItem i=(EmailItem)session.get(EmailItem.class,id);
    if (i == null) {
      return;
    }
    log.info("String_Node_Str" + i.getRecipientAddress() + "String_Node_Str"+ i.getNumAttempts()+ "String_Node_Str"+ i.getId());
    log.info("String_Node_Str" + qi.getResultInfo() + "String_Node_Str"+ qi.getState());
    EmailSendAttempt a=new EmailSendAttempt();
    a.setEmailItem(i);
    a.setStatus(qi.getResultInfo());
    a.setStatusDate(currentDateService.getNow());
    session.save(a);
    i.setSendStatusDate(currentDateService.getNow());
    String sStatus=qi.getResultInfo();
    Integer status=SmtpUtils.getStatusCode(sStatus);
    if (status != null && (status >= 200 || status < 300)) {
      log.info("String_Node_Str" + status + "String_Node_Str"+ sStatus);
      i.setSendStatus("String_Node_Str");
    }
 else {
      long tm=currentDateService.getNow().getTime();
      tm=tm + retryIntervalMs;
      Date retryDate=new Date(tm);
      int attempts=0;
      if (i.getNumAttempts() != null) {
        attempts=i.getNumAttempts();
      }
      if (attempts >= maxAttempts) {
        i.setSendStatus("String_Node_Str");
        log.warn("String_Node_Str" + attempts + "String_Node_Str"+ i.getId());
      }
 else {
        attempts++;
        i.setNextAttempt(retryDate);
        i.setNumAttempts(attempts);
        i.setSendStatus("String_Node_Str");
        log.warn("String_Node_Str" + attempts + "String_Node_Str"+ i.getId());
      }
    }
    session.save(i);
    log.info("String_Node_Str");
    BaseEmailJob job=i.getJob();
    if (job != null) {
      log.info("String_Node_Str");
      job.accept(new AbstractEmailJobVisitor(){
        @Override public void visit(        GroupEmailJob r){
          Date now=currentDateService.getNow();
          r.checkStatus(now,session);
        }
      }
);
    }
 else {
      log.info("String_Node_Str");
    }
    tx.commit();
  }
  finally {
    sessionManager.close();
  }
}