一次神奇的MySQL死锁排查记录

SHOW ENGINE INNODB STATUS 

------------------------ 
LATEST DETECTED DEADLOCK 
------------------------ 
2019-02-22 15:10:56 0x7eec2f468700 
*** (1) TRANSACTION: 
TRANSACTION 2660206487, ACTIVE 0 sec starting index read 
mysql tables in use 1, locked 1 
LOCK WAIT 2 lock struct(s), heap size 1136, 1 row lock(s) 
MySQL thread id 31261312, OS thread handle 139554322093824, query id 11624975750 10.23.134.92 erp_crm__6f73 updating 
/*id:3637ba36*/UPDATE tenant_config SET 
 open_card_point = 0 
 where tenant_id = 123 
*** (1) WAITING FOR THIS LOCK TO BE GRANTED: 
RECORD LOCKS space id 1322 page no 534 n bits 960 index uidx_tenant of table `erp_crm_member_plan`.`tenant_config` trx id 2660206487 lock_mode X locks rec but not gap waiting 
 *** (2) TRANSACTION: 
TRANSACTION 2660206486, ACTIVE 0 sec starting index read 
mysql tables in use 1, locked 1 
3 lock struct(s), heap size 1136, 2 row lock(s) 
MySQL thread id 31261311, OS thread handle 139552870532864, query id 11624975758 10.23.134.92 erp_crm__6f73 updating 
/*id:3637ba36*/UPDATE tenant_config SET 
 open_card_point = 0 
 where tenant_id = 123 
*** (2) HOLDS THE LOCK(S): 
RECORD LOCKS space id 1322 page no 534 n bits 960 index uidx_tenant of table `erp_crm_member_plan`.`tenant_config` trx id 2660206486 lock mode S 
*** (2) WAITING FOR THIS LOCK TO BE GRANTED: 
RECORD LOCKS space id 1322 page no 534 n bits 960 index uidx_tenant of table `erp_crm_member_plan`.`tenant_config` trx id 2660206486 lock_mode X locks rec but not gap waiting 
 *** WE ROLL BACK TRANSACTION (1) 
------------ 

public int saveTenantConfig(PoiContext poiContext, TenantConfigDO tenantConfig) { 
 try { 
  return tenantConfigMapper.saveTenantConfig(poiContext.getTenantId(), poiContext.getPoiId(), tenantConfig); 
 } catch (DuplicateKeyException e) { 
  LOGGER.warn("[saveTenantConfig] 主键冲突，更新该记录。context:{}, config:{}", poiContext, tenantConfig); 
  return tenantConfigMapper.updateTenantConfig(poiContext.getTenantId(), tenantConfig); 
 } 
 } 

insert into ... 
on duplicate key update 

CREATE TABLE `tenant_config` ( 
 `id` bigint(21) NOT NULL AUTO_INCREMENT, 
 `tenant_id` int(11) NOT NULL, 
 `open_card_point` int(11) DEFAULT NULL, 
 PRIMARY KEY (`id`), 
 UNIQUE KEY `uidx_tenant` (`tenant_id`) 
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=COMPACT 

UPDATE tenant_config SET 
 open_card_point = 0 
 where tenant_id = 123