ORA-00445: 后台进程 "P138" 在 120 秒之后仍没有启动

dcswinner

今天发现生产库上的alert日志有如下信息：
Tue Jun 25 08:38:41 2013
Errors in file /home/app/oracle/diag/rdbms/outtrack/outtrack1/trace/outtrack1_ora_17068.trc  (incident=171310):
ORA-00445: 后台进程 "P138" 在 120 秒之后仍没有启动
Incident details in: /home/app/oracle/diag/rdbms/outtrack/outtrack1/incident/incdir_171310/outtrack1_ora_17068_i171310.trc
Tue Jun 25 08:38:49 2013
Dumping diagnostic data in directory=[cdmp_20130625083849], requested by (instance=1, osid=17068), summary=[incident=171310].
Tue Jun 25 08:40:49 2013
Errors in file /home/app/oracle/diag/rdbms/outtrack/outtrack1/trace/outtrack1_ora_31940.trc  (incident=176510):
ORA-00445: 后台进程 "P139" 在 120 秒之后仍没有启动
Incident details in: /home/app/oracle/diag/rdbms/outtrack/outtrack1/incident/incdir_176510/outtrack1_ora_31940_i176510.trc
Tue Jun 25 08:40:49 2013
Sweep [inc][171310]: completed
Sweep [inc2][171310]: completed

数据库版本：11.2.0.3.0。
两个节点的RAC
OS：2.6.18-194.1.AXS3，即红旗SP3。

我查了几篇mos的文档，没发现和我这个case相关的信息，不知各位大神有没有碰到类似的情况，请大神们帮分析分析，谢谢！