20190918宁夏移动suse linux内核升级导致数据库实例undotbs文件损坏重启故障

故障描述：
1、由于漏洞扫描的问题，准备kernel升级到最新版本
升级后：
nxch-smsdb1:/oracle/app/12.2.0/grid/bin # uname -a
Linux nxch-smsdb1 3.12.74-60.64.107-default #1 SMP Tue Oct 2 11:58:05 UTC 2018 (a69b414) x86_64 x86_64 x86_64 GNU/Linux
nxch-smsdb1:/oracle/app/12.2.0/grid/bin # lsb_release -a
LSB Version: n/a
Distributor ID: SUSE LINUX
Description: SUSE Linux Enterprise Server 12 SP1
Release: 12.1
Codename: n/a
nxch-smsdb1:/oracle/app/12.2.0/grid/bin #
未升级：
nxch-smsdb2:/etc # uname -s -a
Linux nxch-smsdb1 3.12.49-11-default #1 SMP Wed Nov 11 20:52:43 UTC 2015 (8d714a0) x86_64 x86_64 x86_64 GNU/Linux
nxch-smsdb2:/home/grid@gd> lsb_release -a
LSB Version: n/a
Distributor ID: SUSE LINUX
Description: SUSE Linux Enterprise Server 12 SP1
Release: 12.1
Codename: n/a

2、1#先stop crs并升级内核，重启后2#数据库实例重启，提示undotbs2等文件损坏

3、关闭1#节点并回退内核
4、通过recover 报错的undotbs文件，offline其他报错的文件，数据库正常open，随后recover datafile成功