oracle 11g rac 又一节点无法启动的生产case怎么办

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一、环境描述
11g rac 双节点，AIX小型机

二、现象
节点2无法启动
crsctl start crs 执行报错。

三、问题分析处理
1.查看数据库日志

Archived Log entry 399348 added for thread 2 sequence 205493 ID 0xffffffff8452e669 dest 1:Sat Dec 09 11:13:47 2017Thread 2 advanced to log sequence 205495 (LGWR switch)  Current log# 3 seq# 205495 mem# 0: +DATA/orcl2/onlinelog/group_3.257.890091875Sat Dec 09 11:13:51 2017Archived Log entry 399349 added for thread 2 sequence 205494 ID 0xffffffff8452e669 dest 1:Sat Dec 09 11:24:07 2017NOTE: ASMB terminatingErrors in file /u01/app/oracle/diag/rdbms/orcl2/PTS22/trace/PTS22_asmb_8847608.trc:ORA-15064: ? ASM ??????ORA-03113: ?????????Errors in file /u01/app/oracle/diag/rdbms/orcl2/PTS22/trace/PTS22_asmb_8847608.trc:ORA-15064: ? ASM ??????ORA-03113: ?????????ASMB (ospid: 8847608): terminating the instance due to error 15064Sat Dec 09 11:24:07 2017

--判断可能是通信问题orcldb2:/u01/app/oracle/diag/rdbms/orcl2/orcl22/trace$oerr ora 1506415064, 00000, "communication failure with ASM instance"// *Cause:  There was a failure to communicate with the ASM instance, most//          likely because the connection went down.// *Action: Check the accompanying error messages for more information on the//          reason for the failure.  Note that database instances will always//          return this error when the ASM instance is terminated abnormally.

2.查看集群日志

2017-12-09 11:23:51.026[cssd(7667900)]CRS-1612:Network communication with node orcldb1 (1) missing for 50% of timeout interval.  Removal of this node from cluster in 14.523 seconds2017-12-09 11:23:59.039[cssd(7667900)]CRS-1611:Network communication with node orcldb1 (1) missing for 75% of timeout interval.  Removal of this node from cluster in 6.509 seconds2017-12-09 11:24:03.052[cssd(7667900)]CRS-1610:Network communication with node orcldb1 (1) missing for 90% of timeout interval.  Removal of this node from cluster in 2.497 seconds2017-12-09 11:24:05.552[cssd(7667900)]CRS-1609:This node is unable to communicate with other nodes in the cluster and is going down to preserve cluster integrity; details at (:CSSNM00008:) in /u01/app/11.2.0/grid/log/orcldb2/cssd/ocssd.log.2017-12-09 11:24:05.552[cssd(7667900)]CRS-1656:The CSS daemon is terminating due to a fatal error; Details at (:CSSSC00012:) in /u01/app/11.2.0/grid/log/orcldb2/cssd/ocssd.log2017-12-09 11:24:05.614[cssd(7667900)]CRS-1652:Starting clean up of CRSD resources.

3.查看系统日志

IDENTIFIER TIMESTAMP  T C RESOURCE_NAME  DESCRIPTIONFE2DEE00   1209123617 P S SYSXAIXIF      DUPLICATE IP ADDRESS DETECTED IN THE NETFE2DEE00   1209122517 P S SYSXAIXIF      DUPLICATE IP ADDRESS DETECTED IN THE NETFE2DEE00   1209114417 P S SYSXAIXIF      DUPLICATE IP ADDRESS DETECTED IN THE NETFE2DEE00   1209114317 P S SYSXAIXIF      DUPLICATE IP ADDRESS DETECTED IN THE NETA924A5FC   1209112417 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERMINATED

综上所以的日志都指向数据库通信可能有问题。

检查心跳网络，在节点一上ping 节点二是通的，ping自己当然也是通的。
这里感觉好奇怪，貌似心跳也没问题啊。各种问好？？？？？？整理下思路，在节点二上ping 节点一，好嘛，真心ping不通。找到这个问题之后和客户沟通，发现网络刚刚做了调整导致的。经过网络工程师的处理。心跳网络恢复。轮到我上了，把集群给拉起来。

--root用户执行crsctl stop crs --报错crsctl stop crs -f 强制关闭crsctl start crscrsctl stat res -t

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