使用错误的操作系统用户exp数据导致ORA-15186错误

生产环境alert日志中出现如下错误：
Fri Dec 30 14:28:28 2016
Errors in file XXXXXX.trc:
ORA-15186: ASMLIB error function = [asm_init],  error = [18446744073709551611],  mesg = [Driver not installed]
ERROR: error ORA-15186 caught in ASM I/O path 

查看trace文件报错如下
*** 2016-12-28 17:49:27.678
*** SESSION ID:(675.38627) 2016-12-28 17:49:27.678
*** CLIENT ID:() 2016-12-28 17:49:27.678
*** SERVICE NAME:(SYS$USERS) 2016-12-28 17:49:27.678
*** MODULE NAME:(exp@xxxxxx (TNS V1-V3)) 2016-12-28 17:49:27.678
*** ACTION NAME:() 2016-12-28 17:49:27.678
确定为exp环境变量错误导致，exp建议应该使用oracle用户操作

原文：http://www.cnblogs.com/Clark-cloud-database/p/7814176.html