近一年一些小坑

1.事务中包含rpc请求

send amq,db commit

db操作成功之前，amq已收到消息，db not find，a sad story

2.int Integer

method param int,传递参数Integer，npe

beanCopy一int,一integer npe

3.mysql lock

for update悲观锁

set autocommit=0;

update xxx where id=1

--------

set autocommit=0; 锁等待，死锁

update xxx where id=1

4.mysql insertorupdate no data,insert,return 1 has same data,return 1 hsa diff data,return 2 5.spring transaction spring 事务传递，try catch并不会起作用 6.客户端发送一次请求，服务端收到多次 http connection: Keep-Alive,调整为close,http长连接，网络不稳定tcp重传机制