导致这个错误的原因是在/etc/hosts中配置了scan的地址，尝试ping这个地址信息，如果可以成功，则这个错误可以忽略。我尝试ping s
cause?-?the plug-in failed in its perform method 
action?-?refer to the logs or contact oracle support services. 
log file location
/u01/app/orainventory/logs/installactions2013-01-04_08-37-53pm.log
/u01/app/orainventory/logs/installactions2013-01-04_08-37-53pm.log 日志报错如下：
info: checking single client access name (scan)...
info: checking name resolution setup for rac_scan...
info: error:
info: prvf-4664 : found inconsistent name resolution entries for scan name rac_scan
info: error:
info: prvf-4657 : name resolution setup check for rac_scan (ip address: 192.168.8.88) failed
info: error:
info: prvf-4664 : found inconsistent name resolution entries for scan name rac_scan
info: verification of scan vip and listener setup failed
搜了一下发现老杨(yangtingkun)的文章中也提到了这个错误：
f:rhel5.532oracle_patchyangtingkun 安装oracle11_2 rac for solaris10 sparc64（二）.mht
老杨在文章的最后提到：
导致这个错误的原因是在/etc/hosts中配置了scan的地址，尝试ping这个地址信息，如果可以成功，，则这个错误可以忽略。
我尝试ping scan ip可以ping通，所以暂时也就忽略了这个错误。