ERROR 9012 (HY000): TiFlash server timeout

有很多类似的帖子,建议先看看
https://pingkai.cn/tidbcommunity/forum/t/topic/542936/
https://pingkai.cn/tidbcommunity/forum/t/topic/183723
https://pingkai.cn/tidbcommunity/forum/t/topic/95926