连接oracle出错!!
刚刚开始学习oracle,用ECLIPSE连接oracle 9i时,提示以下错误:
SQLState:null
Message:Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
Vendor:17002
看了半天也没看懂是什么错误,望高人指点

[解决办法]
1) duplicate host name in the host file
2) Oracle thin driver version issues
3) JDBC port blocking, ie 1521
4) SID & service name issues
5) Oracle BLOB issues
6) result set exhaust, close it before re-crate one.

[解决办法]
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