12570, 00000, "TNS:packet reader failure" // *Cause: An error occurred during a data receive. // *Action: Not normally visible to the user. For further details, turn // on tracing and reexecute the operation. If error persists, contact // Oracle Customer Support.重点检查网络和防火墙
2.是不是navcat连接没有配置好?
3.考虑换一个客户端试一下.
4.把tnsnames.ora 文件贴出来,看一下
// *Cause: An error occurred during a data receive.
// *Action: Not normally visible to the user. For further details, turn
// on tracing and reexecute the operation. If error persists, contact
// Oracle Customer Support.重点检查网络和防火墙
看下服务里面oracle服务启动没有
tnsping 有时通,有时不通。
贴出tnsnames.ora,贴出监听文件
查看本机地址,是否存在动态IP或者双IP地址