# 三副本丢失处理(A)

+ 检查当前集群中是否仍然存在没有 Leader 的 Region，处理 3 副本丢失的 Region
```
./pd-ctl -u http://172.16.5.89:2679 region --jq '.regions[]|select(has("leader")|not)|{id: .id, peer_stores: [.peers[].store_id]}'

{"id":693430,"peer_stores":[693842,694019,694073]}
{"id":694535,"peer_stores":[694073,694019,693842]}
{"id":626594,"peer_stores":[693842,694019,694073]}
{"id":694947,"peer_stores":[693842,694019,694073]}
{"id":692370,"peer_stores":[693842,694019,694073]}
{"id":695305,"peer_stores":[693842,694073,694019]}
……………………………….
```
![center](./student-guide/diagram/place-holder.png)

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检查当前集群中是否仍然存在没有 Leader 的 Region，处理 3 副本丢失的 Region