MySQL多个GTID执行的GTID集

Question

I believe I have an issue of sorts with MySQL Replication on the slaves. Instead of there being one clean GTID under 'Executed GTID Set' there are multiple GTIDs.

Retrieved_Gtid_Set: 54206435-24c7-11e5-bd59-1458d055bee8:354806-354826
Executed_Gtid_Set: 54206435-24c7-11e5-bd59-1458d055bee8:1-354826, cd975336-24c7-11e5-bd5c-1458d04f9808:1-24

I've tried a slave reset all but this doesn't seem to clear it.

Has anyone seen this before? What might be the best way of resolving this?

Thanks in advance

Answer 1

There's nothing to solve here. These are just GTIDs of different servers.

The first part of a GTID is the UUID (unique universal ID, or something like that, IIRC).

54206435-24c7-11e5-bd59-1458d055bee8:354806-354826
<........host......................>:<...GTIDs...>

I'd guess, that these are GTIDs from the master and the localhost in your executed GTID set.

When you do show slave status\\G on the slave there's also a line like this:

Master_UUID: ee624d91-76da-11e4-8f3a-ecf4bbce03bc

which tells you the UUID of the master. On the master you can do

root@localhost:(none) > show slave hosts;
+-----------+------+------+-----------+--------------------------------------+
| Server_id | Host | Port | Master_id | Slave_UUID                           |
+-----------+------+------+-----------+--------------------------------------+
|         2 |      | 3306 |         1 | c5ca7103-2eb7-11e5-be29-0050569b085a |
+-----------+------+------+-----------+--------------------------------------+

In summary, everything's normal. These are most likely GTIDs from your master and some statements you executed on the slave.