偶遇一个小bug clssgmcpDataUpdtCmpl中重复

oracle 12.1.0.2 rac 

分析一个集群重启故障时，发现ocssd.trc中的信息突然时间倒退了，而没有任何异常，看日志的时间戳：

2021-11-24 20:54:40.814556 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:54:40.814563 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:54:40.814800 :    CSSD:1879045888: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 8:2:2, datatype 1 datasize 4
2021-11-24 20:54:40.815186 :    CSSD:1873655552: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 8:2:2 from clientID 2:31:4
2021-11-24 20:54:42.394549 :    CSSD:1839511296: clssnmSendingThread: sending status msg to all nodes
2021-11-24 20:54:42.394601 :    CSSD:1839511296: clssnmSendingThread: sent 5 status msgs to all nodes
2021-11-24 20:54:42.863374 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:54:42.863382 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:54:42.863597 :    CSSD:1879045888: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 8:2:2, datatype 1 datasize 4
2021-11-24 20:54:42.864076 :    CSSD:1873655552: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 8:2:2 from clientID 2:31:4
2021-11-24 20:54:43.535713 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 401 for group GR+N_2, memberID 2147483660:2:1
2021-11-24 20:54:43.535778 :    CSSD:1876809472: clssgmSendEventsToMbrs: Group GR+N_2, member count 2, event master 0, event type 6, event incarn 107328, event member count 1, pids 22961, 30634,
2021-11-24 20:54:44.949724 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:54:44.949732 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:44.870844 :    CSSD:1839511296: clssnmSendingThread: sent 5 status msgs to all nodes
2021-11-24 20:04:45.122266 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:45.122274 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:45.122473 :    CSSD:1879045888: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 8:2:2, datatype 1 datasize 4
2021-11-24 20:04:45.122859 :    CSSD:1873655552: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 8:2:2 from clientID 2:31:4
2021-11-24 20:04:47.171136 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:47.171144 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:47.171368 :    CSSD:1879045888: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 8:2:2, datatype 1 datasize 4
2021-11-24 20:04:47.171789 :    CSSD:1873655552: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 8:2:2 from clientID 2:31:4
2021-11-24 20:04:49.221572 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:49.221584 :    CSSD:1876809472: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 8:2:2
2021-11-24 20:04:49.221840 :    CSSD:1879045888: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 8:2:2, datatype 1 datasize 4
2021-11-24 20:04:49.222266 :    CSSD:1873655552: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 8:2:2 from clientID 2:31:4
2021-11-24 20:04:49.871622 :    CSSD:1839511296: clssnmSendingThread: sending status msg to all nodes
2021-11-24 20:04:49.871676 :    CSSD:1839511296: clssnmSendingThread: sent 5 status msgs to all nodes
2021-11-24 20:04:51.273273 :    CSSD:1876809472: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 8:2:2

从20：54一下“回退”到 20：04，而且奇怪的是，多个ocssd.trc日期被改写为同一时间点了（就是故障时间）

这个ocssd.trc每当涨到50MB时就被归档到一个文件中，时间顺序应该是递增的，不应该是同一个时间点。
一开始以为时间被调整了。
用notepad++打开后搜索，发现信息重复多次



后来发现
12.1.0.2 clssdadr_bucketThread线程导致ocssd.bin CPU使用率过高的问题 (Doc ID 2364202.1)


补丁才32.8K