Oracle12,1,2,0版本中遇到bug25211209

现象描述： 12.1.0.2 集群进程 ocssd.bin 占用较高的 CPU ：

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                     27647 grid      RT   0 5002m 2.8g  86m S 117.6  0.6 209825:27 ocssd.bin

系统总体 CPU 使用并不高，造成以上单个线程的 CPU 使用率较高是由 clsdadr_bucketThread 线程。

#5 0x00007f0b76feb0bc in clsdadr_process_bucket () from /u01/app/12.1.0.2/grid/lib/libhasgen12.so#6 0x00007f0b76feac23 in clsdadr_bucketThread () from /u01/app/12.1.0.2/grid/lib/libhasgen12.so

同时，查看 ocssd.trc 文件中，可以发现大量以下的提示信息：

2018-10-12 14:33:04.342374 :    CSSD:3886925568: clssgmMemberPublicInfo: group OSM_ALL member 1 not found2018-10-12 14:33:04.435152 :    CSSD:3886925568: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 11:2:12018-10-12 14:33:04.435164 :    CSSD:3886925568: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 11:2:12018-10-12 14:33:04.437429 :    CSSD:3889161984: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 11:2:1, datatype 1 datasize 42018-10-12 14:33:04.442236 :    CSSD:3883771648: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 11:2:1 from clientID 1:160:42018-10-12 14:33:04.552308 :    CSSD:3848582912: clssnmSendingThread: sending status msg to all nodes2018-10-12 14:33:04.553123 :    CSSD:3848582912: clssnmSendingThread: sent 4 status msgs to all nodes2018-10-12 14:33:05.353496 :    CSSD:3886925568: clssgmMemberPublicInfo: group OSM_ALL member 1 not found2018-10-12 14:33:06.346352 :    CSSD:3886925568: clssgmMemberPublicInfo: group OSM_ALL member 1 not found2018-10-12 14:33:06.488828 :    CSSD:3886925568: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 11:2:12018-10-12 14:33:06.488842 :    CSSD:3886925568: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 11:2:12018-10-12 14:33:06.492775 :    CSSD:3889161984: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 11:2:1, datatype 1 datasize 42018-10-12 14:33:06.499862 :    CSSD:3883771648: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 11:2:1 from clientID 1:160:42018-10-12 14:33:07.233537 :GIPCHTHR:3878508288: gipchaDaemonWork: DaemonThread heart beat, time interval since last heartBeat 30020loopCount 372018-10-12 14:33:07.349067 :    CSSD:3886925568: clssgmMemberPublicInfo: group OSM_ALL member 1 not found2018-10-12 14:33:08.351711 :    CSSD:3886925568: clssgmMemberPublicInfo: group OSM_ALL member 1 not found2018-10-12 14:33:08.548780 :    CSSD:3886925568: clssgmMbrDataUpdt: Processing member data change type 1, size 4 for group HB+ASM, memberID 11:2:12018-10-12 14:33:08.548794 :    CSSD:3886925568: clssgmMbrDataUpdt: Sending member data change to GMP for group HB+ASM, memberID 11:2:12018-10-12 14:33:08.551894 :    CSSD:3889161984: clssgmpcMemberDataUpdt: grockName HB+ASM memberID 11:2:1, datatype 1 datasize 42018-10-12 14:33:08.558731 :    CSSD:3883771648: clssgmcpDataUpdtCmpl: Status 0 mbr data updt memberID 11:2:1 from clientID 1:160:4

通过查询 MOS，查到类似的情况，详细参考MOS文档 ID 2235698.1，该问题是由 Bug 26513709 造成，可通过应用补丁 20302006 与 25211209 避免，同时，官方宣布在 12.2.0.2 中已经将该 bug修复。