WL#13706: Increase default group_replication_autorejoin_tries
Affects: Server-8.0 — Status: Complete
Change the default group_replication_autorejoin_tries from 0 to (for example) 3. Currently, group_replication_autorejoin_tries is set to 0, which means it is disabled. With this setting, a group replication network partition for longer than 5 seconds causes the member to exit the group and not come back, which results in the need to do a manual operation to bring the member back. The goal is to provide 'automatic network partition handling', including recovering from network partitions, which is most effectively achieved by setting group_replication_autorejoin_tries > 0
FR1: The default value of the variable group_replication_autorejoin_tries shall be set to 3. FR2: It shall be possible to set group_replication_autorejoin_tries to a valid value other than 3.
Change the default value of group_replication_autorejoin_tries from '0' to '3'. Current MTR regressions will run with the new default and shall test the changed default. Evaluate the list of MTR/JET tests failing. Check if these are expected due to the change in autorejoin retries and set the group_replication_autorejoin_tries to zero for such testcases.
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