# ERROR 3092 (HY000): The server is not configured properly to be part of a group. The member has left the group due to network partition or quorum loss.

- **ID:** `database/mysql-group-replication-quorum-loss`
- **Domain:** database
- **Category:** network_error
- **Error Code:** `3092`
- **Verification:** ai_generated
- **Fix Rate:** 78%

## Root Cause

A MySQL Group Replication member cannot maintain connectivity with the majority of group members, causing it to leave the group due to quorum loss or network partition.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| MySQL 8.0 | active | — | — |
| MySQL 8.4 | active | — | — |
| MySQL 9.0 | active | — | — |
| MySQL Shell 8.0.34 | active | — | — |
| Group Replication 8.0 | active | — | — |

## Workarounds

1. **Force the group to re-elect a primary by setting group_replication_force_members to the surviving members' addresses. Example: SET GLOBAL group_replication_force_members='192.168.1.10:33061,192.168.1.11:33061';** (75% success)
   ```
   Force the group to re-elect a primary by setting group_replication_force_members to the surviving members' addresses. Example: SET GLOBAL group_replication_force_members='192.168.1.10:33061,192.168.1.11:33061';
   ```
2. **Increase group_replication_member_expel_timeout to allow more time for reconnection. Example: SET GLOBAL group_replication_member_expel_timeout=30;** (70% success)
   ```
   Increase group_replication_member_expel_timeout to allow more time for reconnection. Example: SET GLOBAL group_replication_member_expel_timeout=30;
   ```
3. **Check network connectivity between all group members using ping and telnet, then fix firewall rules or DNS resolution. Example: ping 192.168.1.12 && telnet 192.168.1.12 33061** (85% success)
   ```
   Check network connectivity between all group members using ping and telnet, then fix firewall rules or DNS resolution. Example: ping 192.168.1.12 && telnet 192.168.1.12 33061
   ```

## Dead Ends

- **Restart the MySQL server without checking group replication status.** — Restarting alone does not restore quorum; the member will still fail to rejoin if the network partition persists or group view is inconsistent. (85% fail)
- **Manually remove the member from the group using STOP GROUP_REPLICATION and then add it back without fixing network issues.** — If the underlying network issue (e.g., firewall, latency) is not resolved, the member will leave again immediately. (90% fail)