greenplum集群节点主机宕机恢复异常persistent serial number 28603383, TID (20,45))“,,0,,“xact.c“,1780,“Stack trace

背景：生产环境greenplum集群（greenplum 4.3.8）数据节点seg12主机上4个mirror及seg13主机上4个mirror实例（对应primary在seg12）发生异常（down），mirror实例宕机后短时间内seg12主机发生异常宕机（此时seg13上已经异常的4个实例对应4个primary主机宕机，即有4个实例对应主备均异常），集群无完整的数据副本已无法进行正常提供服务执行sql报错。此时集群8个mirror异常4个primary异常。

过程：紧急联系机房进行宕机主机恢复，主机未发现硬件类故障，正常开机。

1.执行gprecoverseg因存在4个实例主备均异常故无法进行恢复。

2.尝试gpstop -M fast停止集群进行,进行重启。集群停止后进行启动失败：

ERROR:-gpstart error: Do not have enough valid segments to start the array

3.查看启动异常实例日志

2021-09-28 18:23:13.605756 CST,,,p21903,th-1181391072,,,,0,,,seg-1,,,,,"LOG","00000","database system was not properly shut down; automatic recovery in progr

ess",,,,,,,0,,"xlog.c",6721,

2021-09-28 18:23:13.625746 CST,,,p21903,th-1181391072,,,,0,,,seg-1,,,,,"LOG","00000","redo starts at 2379/10E603E8",,,,,,,0,,"xlog.c",6853,

2021-09-28 18:23:13.949767 CST,,,p21903,th-1181391072,,,,0,,,seg-1,,,,,"LOG","00000","unexpected pageaddr 2378/C7418000 in log file 9081, segment 4, offset 5