在网络不稳定的情况下执行有DBlink的语句后报ORA-07445
Alter log 如下：
Thu Dec 08 14:24:16 2011
DISTRIB TRAN XXXDB.ce2e2088.19.41.416066
  is local tran 19.41.416066 (hex=13.29.65942)
  change pending prepared tran, scn=22949660500 (hex=5.57e80754)
  to pending collecting tran, scn=22949660500 (hex=5.57e80754) 
DISTRIB TRAN XXXDB.ce2e2088.19.41.416066
  is local tran 19.41.416066 (hex=13.29.65942))
  delete pending collecting tran, scn=22949660500 (hex=5.57e80754)
Thu Dec 08 14:25:09 2011
Thread 1 advanced to log sequence 41365
  Current log# 2 seq# 41365 mem# 0: D:\ORACLE\XXXSFCDB\REDO02.LOG
Thu Dec 08 14:25:14 2011
Errors in file d:\oracle\bdump\xxxsfcdb_j001_5776.trc:
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [_kpnfch+224] [PC:0xF986B4] [ADDR:0x84] [UNABLE_TO_READ] []

Thu Dec 08 14:26:13 2011
Errors in file d:\oracle\bdump\xxxdb_j000_4908.trc:
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [_kpnfch+224] [PC:0xF986B4] [ADDR:0x84] [UNABLE_TO_READ] []

希望各位大虾帮忙看一下是什么原因导致的.

开始怀疑与网络有关，但经过几次测试后推翻了结论，真的很急，希望各位大虾给予指导。

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请参考：http://blog.sina.com.cn/s/blog_4d22b9720100tk6w.html