Bug #101515 The requirements of Group Replication are not complete.
Submitted: 9 Nov 2020 4:50 Modified: 8 Apr 2021 12:38
Reporter: Zhou Shu Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Documentation Severity:S3 (Non-critical)
Version:5.7, 8.0 OS:Any
Assigned to: CPU Architecture:Any

[9 Nov 2020 4:50] Zhou Shu 
Description:
transaction_isolation should not be "SERIALIZABLE" in Group Replication.

How to repeat:
When starting Group Replication, the transaction_isolation should not be "SERIALIZABLE". However, this is not mentioned in any place of Chapter 17 Group Replication, especially in https://dev.mysql.com/doc/refman/5.7/en/group-replication.html. It is recommended to add this information in the document.
[9 Nov 2020 6:09] MySQL Verification Team 
Hello Zhou Shu,

Thank you for the report and feedback.

regards,
Umesh
[8 Apr 2021 12:38] Margaret Fisher 
Posted by developer:
 
Thanks for your comment! This information is actually in the Group Replication chapter in the Limitations topic here:

https://dev.mysql.com/doc/refman/8.0/en/group-replication-limitations.html

However, I have had feedback from other users who missed information that was in this topic. So I have moved it to a more prominent location right after the Getting Started material. This should increase its visibility and help users find it at setup time which is when it is needed. I hope that helps.