【问题排查】select for upate 引起的问题

public class C
{
    public void M1()
    {
        this.M2();
    }
    
    @Transactional
    public void M2()
    {
        String sql="select * from t1 where id=1 for update";
        executeSql(sql);
        
        // 其它的一些事务操作
    }
}

select * from t1 where id=1 for update --readonly

public void M1() {
    C c = SpringUtils.getBean(C.class);
    c.M2();
}

@Autowired
private C c1;

public void M1() {

    c1.M2();
}