背景介绍：
这是一套windows的rac系统。数据库后台日志报ORA-00474:SMON process terminated with error。接着报ORA-00603,ORA-27501,ORA-27300,ORA-27301,ORA-27302等错误。
问题分析：
1.数据库alert日志
Fri Feb 28 04:12:09 2014
Reconfiguration started (old inc 32, new inc 34)
List of nodes:
Global Resource Directory frozen
* dead instance detected - domain 0 invalid = TRUE
Communication channels reestablished
Master broadcasted resource hash value bitmaps
Non-local Process blocks cleaned out
Fri Feb 28 04:12:09 2014
LMS 2: 0 GCS shadows cancelled, 0 closed
Fri Feb 28 04:12:10 2014
LMS 1: 0 GCS shadows cancelled, 0 closed
Fri Feb 28 04:12:11 2014
LMS 3: 0 GCS shadows cancelled, 0 closed
Fri Feb 28 04:12:12 2014
LMS 0: 2 GCS shadows cancelled, 2 closed
Set master node info
Submitted all remote-enqueue requests
Dwn-cvts replayed, VALBLKs dubious
All grantable enqueues granted
Post SMON to start 1st pass IR
Fri Feb 28 04:12:12 2014
Instance recovery: looking for dead threads
Fri Feb 28 04:12:12 2014
LMS 3: 10102 GCS shadows traversed, 0 replayed
Fri Feb 28 04:12:12 2014
LMS 1: 10083 GCS shadows traversed, 0 replayed
Fri Feb 28 04:12