MySQL Bugs: #92454: [GCS] Error pushing message into group communication engine

Bug #92454	[GCS] Error pushing message into group communication engine
Submitted:	17 Sep 2018 7:16	Modified:	2 Nov 2018 14:34
Reporter:	Yashwanth Aluru	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Group Replication	Severity:	S3 (Non-critical)
Version:	8.0.11-commercial	OS:	CentOS
Assigned to:		CPU Architecture:	Any

Description:
I configured group replication on two of our servers running MySQL Commercial version 8.0.11.

Whenever I remove a member from group using `STOP GROUP_REPLICATION;` I observe, its log file prints the following error,

[ERROR] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Error pushing message into group communication engine.'

Same line is printed multiple times. But the command doesn't fail. Later, server stays in **SUPER_READ_ONLY** mode without accepting any write requests.This mode needs to be deactivated manually.

Any workaround for these issues?

How to repeat:
Stop group replication using the command,

STOP GROUP_REPLICATION;

Check the server's log file and it throws an error,

[ERROR] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Error pushing message into group communication engine.'

Suggested fix:
Error should be avoided with a configuration option in options file

Thanks for the report!

kind regards
Bogdan

Am using MY-8.0.12 even am also getting like this.
how to fix this error? any suggestions will be appreciated.

Posted by developer:
 
Changelog entry added for MySQL 8.0.14:

After a STOP GROUP_REPLICATION statement was issued to remove a server instance from a group, multiple instances of the error message "[GCS] Error pushing message into group communication engine" were logged on the server instance.  The error is now ignored when a server is in the process of leaving a group or is no longer a member of a group.