innodb_index_stats导入备份数据时报错表主键冲突的

故障描述 percona5.6，mysqldump全备份，导入备份数据时报错Duplicate entry 'hoc_log99-item_log_27-PRIMARY-n_diff_pfx01' for key 'PRIMARY' 故障原因 查看了下这个主键应该是MySQL系统库下的系统表innodb_index

故障描述

percona5.6，mysqldump全备份，导入备份数据时报错Duplicate entry 'hoc_log99-item_log_27-PRIMARY-n_diff_pfx01' for key 'PRIMARY'

故障原因

查看了下这个主键应该是MySQL系统库下的系统表innodb_index_stats

mysql> show create table innodb_index_stats\G 1. row Table: innodb_index_stats Create Table: CREATE TABLE innodb_index_stats ( database_name varchar(64) COLLATE utf8_bin NOT NULL, table_name varchar(64) COLLATE utf8_bin NOT NULL, index_name varchar(64) COLLATE utf8_bin NOT NULL, last_update timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, stat_name varchar(64) COLLATE utf8_bin NOT NULL, stat_value bigint(20) unsigned NOT NULL, sample_size bigint(20) unsigned DEFAULT NULL, stat_description varchar(1024) COLLATE utf8_bin NOT NULL, PRIMARY KEY (database_name,table_name,index_name,stat_name) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0

1 row in set (0.00 sec)

mysql> select * from innodb_index_stats where database_name='hoc_log99' and table_name='item_log_27' and stat_name='n_diff_pfx01' and index_name='PRIMARY'; +---------------+-------------+------------+---------------------+--------------+------------+-------------+------------------+ | database_name | table_name | index_name | last_update | stat_name | stat_value | sample_size | stat_description | +---------------+-------------+------------+---------------------+--------------+------------+-------------+------------------+ | hoc_log99 | item_log_27 | PRIMARY | 2016-10-07 18:44:06 | n_diff_pfx01 | 823672 | 20 | redid | +---------------+-------------+------------+---------------------+--------------+------------+-------------+------------------+ 1 row in set (0.00 sec)

再查看下我当时的备份文件sql的记录，发现再导入这个表之前是会重建表的，排除了再导入这个表之前，有item_log_27 表的操作记录进了innodb_index_stats的可能。

-- Table structure for table innodb_index_stats DROP TABLE IF EXISTS innodb_index_stats; CREATE TABLE innodb_index_stats ( -- Dumping data for table innodb_index_stats LOCK TABLES innodb_index_stats WRITE; /!40000 ALTER TABLE innodb_index_stats DISABLE KEYS /;

于是我又查看了下最近的binlog记录，发现确实有重建这个表的操作

DROP TABLE IF EXISTS innodb_index_stats / generated by server / CREATE TABLE innodb_index_stats ( /!40000 ALTER TABLE innodb_index_stats DISABLE KEYS /

结论

mysql 5.6的bug，也有其他同行遇到了一样的错误

https://www.percona.com/forums/questions-discussions/mysql-and-percona-server/31971-mysql-innodb_index_stats-duplication-entry-error-on-restore

https://bugs.mysql.com/bug.PHP?id=71814

解决办法

1 mysqldump添加参数忽略这个表的备份

2 将备份文件中的这个表的insert改为replace

3 mysql -f强制导入

以上这篇innodb_index_stats导入备份数据时报错表主键冲突的解决方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持每日运维。