【问题】我启动sudo phala start ，发现khala-node 和 kusama-node启动失败.
查看log 如下：
phala-pherry | Caused by:
phala-pherry | 0: Networking or low-level protocol error: Failed to resolve IP addresses for this hostname: 0
phala-pherry | 1: Failed to resolve IP addresses for this hostname: 0
phala-pherry | [2021-12-15T01:25:59Z INFO pherry] bridge() exited with error: Rpc error: Networking or low-level protocol error: Failed to resolve IP addresses for this hostname: 0
phala-pherry |
phala-pherry | Caused by:
phala-pherry | 0: Networking or low-level protocol error: Failed to resolve IP addresses for this hostname: 0
phala-pherry | 1: Failed to resolve IP addresses for this hostname: 0
phala-pherry | [2021-12-15T01:27:00Z INFO pherry] bridge() exited with error: Rpc error: Networking or low-level protocol error: Failed to resolve IP addresses for this hostname: 0
phala-pherry |
phala-node | 2021-12-15 04:34:49 [Parachain] 
Highest known block at #885348
phala-node | 2021-12-15 04:34:49 [Parachain] 
Prometheus exporter started at 0.0.0.0:9615
phala-node | 2021-12-15 04:34:49 [Relaychain] GRANDPA voter error: Client(BadJustification(“invalid precommits for target commit”))
phala-node | 2021-12-15 04:34:49 [Relaychain] Essential task grandpa-voter failed. Shutting down service.
phala-node | 2021-12-15 04:34:49 [Parachain] Listening for new connections on 0.0.0.0:9944.
phala-node | Error: Service(Other(“Essential task failed.”))
【操作复盘】：
之前挖矿一直正常，突然某天就出问题呢。
我这边删除 /var/khala-dev-node/polkadot 这个目录，重启sudo phala start, 可以成功启动node节点。
但是，这样删除后，矿机注册后的公钥和以前是一样的吗？
有什么办法可以备份矿机的公钥呢?
【报错信息】
----------------------------- 脚本版本 0.1.6 ----------------------------
服务名称 服务状态 本地节点区块高度
khala-node exited / 893894
kusama-node exited / 10524377
phala-pruntime running
phala-pherry running khala 0 / kusama 0
状态检查 结果
khala链同步状态 同步中, 请等待, 差值为 9630483
kusama链同步状态 同步完成, 差值为 0
pherry同步khala链状态 同步完成, 差值为
pherry同步kusama链状态 同步完成, 差值为
账户信息 内容
节点名称 pha11
计算机使用核心 16
【补充说明】这是社群中其他人的相似问题，我猜测可能是xx错误