Description:
1.mysql5.7.20 multi master environment, after abnormal recovery, after data synchronization, the state has been RECOVERING
Prerequisite：
Multi master state, using sqltest script service
10.46.178.140
10.46.178.19
10.46.178.152
Operation steps:
178.140：
mysql> STop GROUP_REPLICATION;
Query OK, 0 rows affected (1.00 sec)
mysql> SET GLOBAL group_replication_bootstrap_group=ON;
Query OK, 0 rows affected (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (2.01 sec)
mysql>
mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
Query OK, 0 rows affected (0.00 sec)
mysql
178.19：
mysql> STop GROUP_REPLICATION;
Query OK, 0 rows affected (1.04 sec)
mysql> START GROUP_REPLICATION;
SET GLOBAL group_replication_bootstrap_group=OFF;
ERROR 3092 (HY000): The server is not configured properly to be an active member of the group. Please see more details on error log.
mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql>
mysql>
mysql> set global group_replication_allow_local_disjoint_gtids_join=ON;
Query OK, 0 rows affected (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (3.32 sec)
mysql>
mysql>
mysql> select count(*) from test.TBL_TRANSACTION_TRACE_1;
+----------+
| count(*) |
+----------+
| 3803 |
+----------+
1 row in set (0.01 sec)
mysql>
178.152：
mysql>
mysql> set global group_replication_allow_local_disjoint_gtids_join=ON;
Query OK, 0 rows affected (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (6.04 sec)
mysql>select count(*) from test.TBL_TRANSACTION_TRACE_1;
+----------+
| count(*) |
+----------+
| 22846 |
+----------+
1 row in set (0.02 sec)
mysql>
178.19 after the environment starts, it's still in sync
mysql> select count(*) from test.TBL_TRANSACTION_TRACE_1;
+----------+
| count(*) |
+----------+
| 16533 |
+----------+
1 row in set (0.01 sec)
mysql> select count(*) from test.TBL_TRANSACTION_TRACE_1;
+----------+
| count(*) |
+----------+
| 16560 |
+----------+
1 row in set (0.02 sec)
mysql>
mysql> select count(*) from test.TBL_TRANSACTION_TRACE_1;
+----------+
| count(*) |
+----------+
| 22846 |
+----------+
1 row in set (0.03 sec)
View group replication status:
mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| group_replication_applier | 142076a7-becb-11e7-87e1-00e081d4b651 | centos19 | 3308 | RECOVERING |
| group_replication_applier | 243880d9-becb-11e7-ad9f-e0071bf256bc | centos140 | 3308 | ONLINE |
| group_replication_applier | 97484eff-bed3-11e7-b3cb-e0071bf246f4 | redhat152 | 3308 | ONLINE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
3 rows in set (0.00 sec)
mysql>
Test result:
178.19 after synchronization, the state has been RECOVERING
178.152 and 178.140 updated successfully
152：
mysql> create database a1;
Query OK, 1 row affected (0.00 sec)
mysql>
140：
mysql> create database a3;
Query OK, 1 row affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| a1 |
| a3 |
| abc |
| mysql |
| performance_schema |
| sys |
| test |
| tt |
+--------------------+
9 rows in set (0.00 sec)
mysql>
178.19 update failed:
mysql> create database a2;
ERROR 1290 (HY000): The MySQL server is running with the --super-read-only option so it cannot execute this statement
mysql>
You need to restart the 178.19 groups of replication services for recovery
Journal：
The 3 node prints the same log
2017-11-01T08:39:36.712874Z 0 [Warning] Plugin group_replication reported: 'The member with address centos140:3308 has already sent the stable set. Therefore discarding the second message.'
2017-11-01T08:39:53.328047Z 0 [Warning] Plugin group_replication reported: 'The member with address centos19:3308 has already sent the stable set. Therefore discarding the second message.'
2017-11-01T08:40:36.722983Z 0 [Warning] Plugin group_replication reported: 'The member with address centos140:3308 has already sent the stable set. Therefore discarding the second message.'
2017-11-01T08:40:53.345927Z 0 [Warning] Plugin group_replication reported: 'The member with address centos19:3308 has already sent the stable set. Therefore discarding the second message.'
How to repeat:
When the service is down, the down drops the network card to boot the host (the service is guided by the main down pressure)
Suggested fix:
After synchronization, the status is updated to onlie
