bug记录：spring手动事务没能关闭导致的系统崩溃

bug描述

spring手动事务没能关闭，而spring默认的事务传播机制是：PROPAGATION_REQUIRED，支持当前事务;如果不存在，创建一个新的。导致后面的Spring事务都往这个事务里面去，还一直提交不了，导致系统崩溃。

@Autowired
  private PlatformTransactionManager txManager;
 
  @Autowired
  private ShopGroupBuyDao shopGroupBuyDao;
 
  @GetMapping(value = "/transactionDemo")
  public void ceshi() {
 
    // 手动开启事务  start
    DefaultTransactionDefinition def = new DefaultTransactionDefinition();
    def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
    TransactionStatus status = txManager.getTransaction(def);
    // 手动开启事务  end
 	 ShopGroupBuy shopGroupBuy = shopGroupBuyDao.selectOne(new LambdaQueryWrapper<ShopGroupBuy>()
                                                                .eq(ShopGroupBuy::getGroupBuyId, 505));
 
      shopGroupBuy.setGroupBuyTheme("wulin11");
 
      int i = shopGroupBuyDao.updateById(shopGroupBuy);
 
      int a = 1 / 0;
    try {
      // 手动提交事务  start
      txManager.commit(status);
      // 手动提交事务  end
 
      if (i > 0) {
        System.out.println("更新成功");
      } else {
        System.out.println("更新失败");
      }
 
    } catch(Exception e) {
 
      e.printStackTrace();
 
      // 手动回滚事务  start
      txManager.rollback(status);
      // 手动回滚事务  end
      
    }
  }

bug查找过程

这类问题比较难查找，一开始查慢sql，查不到。查执行的process看不到sql语句，看不到具体是哪个sql。后来经大神指点，分析错误日志，才定位到此问题

SELECT * from performance_schema.events_statements_history order by LOCK_TIME desc limit 10;
SELECT * FROM INFORMATION_SCHEMA.INNODB_TRX order by trx_started asc

SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCKS where lock_trx_id = 6037541544;

SELECT * FROM INFORMATION_SCHEMA.INNODB_TRX where trx_id = 6037541544;