Oracle 11g RAC CRS-4535/ORA-15077

oracle 11.2.0.4的rac集群，其中一个节点出现故障，集群无法启动，

使用crsctl check crs查看集群状况如下：

[grid@db2 client]$ crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4529: Cluster Synchronization Services is online

ps -ef | grep d.bin   #下面的查询中没有crsd.bin 

查看tail -100 alertdb2.log
[client(193951)]CRS-1013:The OCR location in an ASM disk group is inaccessible. Details in /u01/app/11.2.0/grid/log/db2/client/crsctl_oracle.log.

2016-11-22 16:37:37.539: 

提示不能访问asm磁盘组中的OCR信息，详细信息查看client中的日志。

[grid@db2 client]$ tail -100 crsctl