我正在查看使用JDBC连接来连接到Oracle 11g数据库(11.2.0)的Web应用程序。该应用程序不工作了一段时间的任何问题(约一小时),然后我得到:ORA-12505,TNS:监听器当前不知道Tomcat应用程序中的连接描述符中给出的SID
java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
我试图重新启动Oracle和Oracle服务OracleServiceXE和OracleXETNSListener但误差不会走的方式。它在我重启机器后才会消失。
我没有更改我的Tomcat或Oracle中的任何数据库参数。
这里是我的tnsnames.ora
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
这里是我的JDBC配置:
String serverName = "localhost";
String portNumber = "1521";
String sid = "xe";
String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
String username = "xxx";
String password = "yyy";
当 “XE” 工作正常,如果我检查lsnrctl的状态,我可以看到
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully
一旦我得到异常,当我检查lsnrctl状态时,我没有看到实例“xe”。
我想知道为什么我在一段时间后得到这个异常以及如何解决这个问题。如果没有,我怎样才能避免重新启动我的机器?谢谢。