我正在尝试使用以下连接字符串从NetBeans连接到Oracle 10.2.0：

jdbc:oracle:thin:@localhost:1521:XE

最奇怪的部分是，一切正常，直到其中一次重新启动。 我一直都在收到这个TNS-12505错误； 看一下我的tnsnames.ora中的最终条目：

TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production on 14-APR-2011 13:46:48

Copyright (c) 1991, 2005, Oracle. All rights reserved.

System parameter file is D:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora

Log messages written to D:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log

Trace information written to D:\oraclexe\app\oracle\product\10.2.0\server\network\trace\listener.trc

Trace level is currently 0

Started with pid=3460

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Brodyaga-PC)(PORT=1521)))

Listener completed notification to CRS on start

TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE

14-APR-2011 13:48:54 * (CONNECT_DATA=(SID=XE)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=Brodyaga))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=58458)) * establish * XE * 12505

TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

14-APR-2011 13:49:00 * (CONNECT_DATA=(SID=XE)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=Brodyaga))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=58481)) * establish * XE * 12505

TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

14-APR-2011 13:49:02 * (CONNECT_DATA=(SID=XE)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=Brodyaga))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=58487)) * establish * XE * 12505

TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

14-APR-2011 13:50:23 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=Brodyaga))(COMMAND=services)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=169869568)) * services * 0

前三个条目是我尝试从NetBeans连接的尝试。 第四，通过SQL * Plus的连接工作正常。

以下是我的tnsnames.ora的内容：

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = D:\oraclexe\app\oracle\product\10.2.0\server)

(PROGRAM = extproc)

)

(SID_DESC =

(SID_NAME = CLRExtProc)

(ORACLE_HOME = D:\oraclexe\app\oracle\product\10.2.0\server)

(PROGRAM = extproc)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))

(ADDRESS = (PROTOCOL = TCP)(HOST = Brodyaga-PC)(PORT = 1521))

)

)

DEFAULT_SERVICE_LISTENER = (XE)

和tnsnames.ora：

XE =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = Brodyaga-PC)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = XE)

)

)

EXTPROC_CONNECTION_DATA =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))

)

(CONNECT_DATA =

(SID = PLSExtProc)

(PRESENTATION = RO)

)

)

ORACLR_CONNECTION_DATA =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))

)

(CONNECT_DATA =

(SID = CLRExtProc)

(PRESENTATION = RO)

)

)

并从> lsnrctl服务输出

C:\Users\Brodyaga>lsnrctl services

LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 14-APR-2011 13:59

:45

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))

Services Summary...

Service "CLRExtProc" has 1 instance(s).

Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:0 refused:0

LOCAL SERVER

Service "PLSExtProc" has 1 instance(s).

Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:0 refused:0

LOCAL SERVER

The command completed successfully

两个Oracle服务都已启动，并且SQL * Plus可以正常连接。

有此错误的解决方法吗？