XDB引起的RAC问题 ORA-03113

前些天去现场配合搭建测试环境

环境是主机IBM的HA，oracle RAC 基础版本9.2.0.1  升级到9.2.0.8

偶然遇到新建的RAC环境无法升级数据字典，可以新建用户，但是无法删除用户的错误，删除用户时报错ORA-03113 end-of-file on communication channel，按照官方手册的说法来解决，发现并不是Net8的问题。

alert文件的错误信息如下：

Successful open of redo thread 1
Wed Apr 28 13:44:43 2010
SMON: enabling cache recovery
Instance recovery: looking for dead threads
Instance recovery: lock domain invalid but no dead threads
Wed Apr 28 13:44:43 2010
Successfully onlined Undo Tablespace 1.
Wed Apr 28 13:44:43 2010
SMON: enabling tx recovery
Wed Apr 28 13:44:43 2010
Database Characterset is ZHS16GBK
replication_dependency_tracking turned off (no async multimaster replication found)
Completed: ALTER DATABASE OPEN
Wed Apr 28 13:45:33 2010
Errors in file /oracle/admin/xc/udump/xc1_ora_782472.trc:
ORA-00600: internal error code, arguments: [qmxiUnpPacked2], [121], [], [], [], [], [], []
Wed Apr 28 13:45:34 2010
Trace dumping is performing id=[cdmp_20100428134534]
Wed Apr 28 13:46:46 2010
Errors in file /oracle/admin/xc/udump/xc1_ora_782472.trc:
ORA-00600: internal error code, arguments: [qmxiUnpPacked2], [121], [], [], [], [], [], []
Wed Apr 28 13:46:47 2010
Errors in file /oracle/admin/xc/udump/xc1_ora_782472.trc:
ORA-07445: exception encountered: core dump [] [] [] [] [] []
ORA-00600: internal error code, arguments: [qmxiUnpPacked2], [121], [], [], [], [], [], []
Wed Apr 28 13:46:47 2010
Trace dumping is performing id=[cdmp_20100428134647]
Wed Apr 28 13:51:09 2010
Shutting down instance: further logons disabled
Shutting down instance (immediate)
License high water mark = 3
Waiting for dispatcher 'D000' to shutdown
All dispatchers and shared servers shutdown
Wed Apr 28 13:51:11 2010
ALTER DATABASE CLOSE NORMAL
Wed Apr 28 13:51:11 2010
SMON: disabling tx recovery
SMON: disabling cache recovery

经过分析和测试，发现是XDB引起的，于是乎，在安装库的时候去掉了XDB组件，问题解决。但是具体XDB为什么会引起这个问题却无法得知。希望在以后的学习中能更多的了解错误信息，解答心中的疑问。