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丸趣 TV 小编给大家分享一下 MySQL5.7 中 mysqldump: 查询 Error 2013 备份报错怎么办，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
描述
生产环境使用 MySQL5.7.19 之前每天正常的备份突然报错，后台日志报错信息如下：
2018-11-01T20:33:05.754602Z 57223 [Note] Aborted connection 57223 to db: *** user: root host: localhost (Got timeout writing communication packets)
2018-11-02T20:32:02.062349Z 57512 [Note] Aborted connection 57512 to db: *** user: root host: localhost (Got timeout writing communication packets)
2018-11-03T17:02:17.276883Z 57759 [Note] Aborted connection 57759 to db: *** user: root host: localhost (Got timeout writing communication packets)
2018-11-03T20:33:42.574751Z 57802 [Note] Aborted connection 57802 to db: *** user: root host: localhost (Got timeout writing communication packets)
2018-11-04T08:57:33.911527Z 57952 [Warning] IP address ***.****.***.*** could not be resolved: Name or service not known
2018-11-04T20:32:41.571757Z 58092 [Note] Aborted connection 58092 to db: *** user: root host: localhost (Got timeout writing communication packets)
2018-11-05T00:52:24.345151Z 58144 [Note] Aborted connection 58144 to db: *** user: root host: localhost (Got timeout writing communication packets)
解决思路
一开始认为是包最大值太小，即调大 max_allowed_packet 参数，将参数调大到 200M 之后再进行备份发现备份依然报错查看报错信息：
mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `***` at row: 325118 与后台日志信息：
2018-11-05T01:12:30.211358Z 58154 [Note] Aborted connection 58154 to db: *** user: root host: localhost (Got timeout writing communication packets)
查看 timeout 参数信息：
mysql show global variables like %timeout%
+-------------------------------+----------+
| Variable_name | Value
+-------------------------------+----------+
| connect_timeout | 10 |
| delayed_insert_timeout | 300 |
| have_statement_timeout | YES |
| innodb_flush_log_at_timeout | 1 |
| innodb_lock_wait_timeout | 50 |
| innodb_rollback_on_timeout | OFF |
| interactive_timeout | 28800 |
| lock_wait_timeout | 31536000|
| net_read_timeout | 30 |
| net_write_timeout | 60 |
| rpl_stop_slave_timeout | 31536000|
| slave_net_timeout | 60 |
| wait_timeout | 28800 |
+-------------------------------+----------+
13 rows in set (0.00 sec) 查阅官方文档发现这两个参数值太小导致 mysqldump 报错
| net_read_timeout | 30 |
| net_write_timeout | 60 |调大这两个参数：
mysql set global net_read_timeout = 120;
Query OK, 0 rows affected (0.00 sec)
mysql set global net_write_timeout = 900;
Query OK, 0 rows affected (0.00 sec)再执行备份脚本，报错信息消失，备份正常！
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