Bug #93130 Backport Bug#28443958 to mysql-5.7
Submitted: 8 Nov 2018 18:58 Modified: 27 Nov 2018 16:49
Reporter: Pedro Gomes Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Group Replication Severity:S3 (Non-critical)
Version:5.7.25 OS:Any
Assigned to: CPU Architecture:Any

[8 Nov 2018 18:58] Pedro Gomes 
Description:
Due to the effects of the failures reported on Bug#28443958, this bug shall be backported to 5.7
This would prevent whole group shutdowns do to a join during a period of heavy load and concurrency 

How to repeat:
Read original bug

Suggested fix:
Port the patch
[27 Nov 2018 16:49] David Moss 
Posted by developer:
 
Thank you for your feedback, this has been fixed in upcoming versions and the following was added to the 5.7.25 / 8.0.13 changelog:
When the certification information was too big to transmit, an event was generated that caused failures in all group members. To avoid this situation, when the certification is so large now an error is generated which makes the joining member leave the group.
[12 Dec 2018 14:20] David Moss 
Posted by developer:
 
The changelog was updated to say:
When adding a new member to a group, if the certification information was too big to transmit, an event was generated that caused failures in all group members. To avoid this situation, now if the certification information is too large an error is generated which makes the joining member leave the group.