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我有一个莫名其妙的问题。我在 Linux 上设置了一个运行良好的 Oracle 11g。我能够使用基于 SID 的连接字符串从其他机器远程连接，例如

sqlplus myschema@192.168.184.102:1521:orcl

然后由于某种莫名其妙的原因它停止工作。我不确定我或其他人是否松了口气。

现在我只能使用基于 SERVICE_NAME 或 TNSNAME 的方法进行远程连接

sqlplus myschema@192.168.184.102:1521/orcl

sqlplus myschema@ORCL

两者都可以，这很好，但是我有依赖于 SID 连接模式的应用程序，我可以更改它们。有什么好心人能帮我弄清楚我错过了什么

下面是我的配置：

听众.ORA：

[oracle@dbora112 ~]$ cat  /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# listener.ora Network Configuration File: /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = dbora112)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /opt/u01/app/oracle

听众状态：

[oracle@dbora112 ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-MAR-2015 14:50:05

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                04-MAR-2015 14:37:12
Uptime                    0 days 0 hr. 12 min. 52 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /opt/u01/app/oracle/diag/tnslsnr/dbora112/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dbora112)(PORT=1521)))
Services Summary...
Service "orcl" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully

TNSNAMES.ORA：

[oracle@dbora112 ~]$ cat /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.184.102)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SID = orcl)
    )
  )

LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.184.102)(PORT = 1521))

SQLNET：

[oracle@dbora112 ~]$ cat /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora
# sqlnet.ora Network Configuration File: /opt/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

ADR_BASE = /opt/u01/app/oracle

可以使用 TNS 连接没有问题

[oracle@dbora112 ~]$ sqlplus schema/xxx@ORCL

SQL*Plus: Release 11.2.0.3.0 Production on Wed Mar 4 14:54:10 2015

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>

可以使用服务名称毫无问题地连接

[oracle@dbora112 ~]$ sqlplus schema/xxx@192.168.184.102/ORCL

SQL*Plus: Release 11.2.0.3.0 Production on Wed Mar 4 14:55:52 2015

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>

无法与 SID 连接

[oracle@dbora112 ~]$ sqlplus schema/xxx@192.168.184.102:orcl

SQL*Plus: Release 11.2.0.3.0 Production on Wed Mar 4 14:56:38 2015

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

ERROR:
ORA-12545: Connect failed because target host or object does not exist

数据库实例 (SID)

SQL> select instance_name from v$instance;

INSTANCE_NAME
----------------
orcl
4

2 回答 2

1

由于您可以使用您的 TNS 别名进行连接，并且在连接描述中使用 SID，因此 SID 可以正常工作。

但是您的 EasyConnect 字符串不正确。从 SQL*Plus 文档中：

简单或缩写的连接标识符具有以下语法：

[//]host[:port][/service_name]

您不能将 SID 与 Easy Connect 一起使用，只能使用服务名称；所以你的连接使用：

sqlplus schema/xxx@192.168.184.102:orcl

甚至

sqlplus schema/xxx@192.168.184.102:1521:orcl

......永远不会奏效。您可以使用旧样式将该表单与 JDBC URL 一起使用：

jdbc:oracle:thin:@192.168.184.102:1521:orcl

...但这与 SQL*Plus 连接不同，尽管看起来很相似。

如果您尝试检查该形式的 JDBC 连接是否可以工作，则无法使用 SQL*Plus 进行此操作，但您的 TNS 别名检查正在验证它是否按照您的预期设置 - 只要它使用相同的主机、端口和 SID。使用较新的 JDBC 语法可能会更好，但从问题来看，您似乎无法更改它。

阅读有关轻松连接的更多信息。

于 2015-03-04T16:34:03.613 回答
0

这可能是 Oracle 无法将主机名解析为 IP 的情况。你能用 nslookup 解析你的主机名吗？IE，

nslookup 你的主机名

还要确保反向查找正常工作：

nslookup yourIpAddr

于 2015-03-04T15:22:52.920 回答