我目前有一个将行插入表的长过程 A 源于 A 以及 B . 从这个过程开始 insert 表中的操作 B 已超时。这就是我的表现 SHOW ENGINE INNODB STATUS :

---TRANSACTION 3597993, ACTIVE 108 sec inserting
mysql tables in use 1, locked 1
LOCK WAIT 2 lock struct(s), heap size 1136, 1 row lock(s)
MySQL thread id 173507, OS thread handle 140455303333632, query id 1051475 10.0.0.6 root update
INSERT INTO `B` (`id`, `time`, `elem_1`, `elem_2`) VALUES (251322486, '2018-04-27 19:29:59', 'PTY', 'USD')
------- TRX HAS BEEN WAITING 108 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 6 page no 5859 n bits 96 index PRIMARY of table `default`.`B` trx id 3597993 lock_mode X insert intention waiting
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info bits 0
 0: len 8; hex 73757072656d756d; asc supremum;;

我对 InnoDB 规则是不应该有一个锁发生在 B ，因为唯一正在运行的进程是从中读取，而不是更新或插入。
正在进行的插入操作具有以下结构：

insert into `default`.A
select * from (select i1.id, min(IFNULL(i2.id,-1)) as next_id, i1.item_1, i1.item_2 from
(select idx.id, idx.item_2, idx.item_2
 from `default`.B idx left join `default`.A map on
idx.id = map.id and idx.item_1 = map.item_1 where map.id is null or map.next_id = -1) i1 left join
`default`.B i2 on i1.id < i2.id and i1.item_1 = i2.item_1 and i1.item_2 = i2.item_2
group by i1.id, i1.item_1, i1.item_2) new_entries
on duplicate key update next_id = new_entries.next_id

这是我使用的db版本：

mysql> SHOW VARIABLES LIKE "%version%";
+-------------------------+--------------------------------------+
| Variable_name           | Value                                |
+-------------------------+--------------------------------------+
| innodb_version          | 5.7.21                               |
| protocol_version        | 10                                   |
| slave_type_conversions  |                                      |
| version                 | 10.2.13-MariaDB-10.2.13+maria~jessie |
| version_comment         | mariadb.org binary distribution      |
| version_compile_machine | x86_64                               |
| version_compile_os      | debian-linux-gnu                     |
| version_malloc_library  | system                               |
| version_ssl_library     | OpenSSL 1.0.1t  3 May 2016           |
| wsrep_patch_version     | wsrep_25.21                          |
+-------------------------+--------------------------------------+

更新
我停止了这个长期运行的操作并重新启动了它，现在插入看起来没有阻碍，所以我倾向于考虑一些暂时的bug