# [Known Issues] TiKV v5.x 重启日志会有 Error 报错 “Failed to init io snooper"

## Key Words

TiKV 重启报错, snooper

## Description

TiKV 重启时，会有以下 Error 报错，但实际 TiKV 正常启动成功

```text
[2022/12/11 07:56:52.234 +08:00] [ERROR] [server.rs:1036] ["failed to init io snooper"] [err_code=KV:Unknown] [err=""IO snooper is not started due to not compiling with BCC""]
```

## Content

日志报错 `[Error] [server.rs:1071] ["failed to init io snooper"] [err_code=KV:Unknown] [err=""IO snooper is not started due to not compiling with BCC""]` 实际是未开启 Io snooper 的预期报错，实际对集群的使用不会有影响。另外 TIKV 已经创建 PR 将其 ERROR 级别做了修改，另外对 I/O 状态检测做了优化，去掉了对 IO Snooper 进行检测。参考 PR <https://github.com/tikv/tikv/pull/11873>。

## Affected Versions

v6.0 之前的版本