Oracle11g ORA-12505，TNS：一段时间后，侦听器目前不知道Tomcat应用程序中连接描述符中给出的SID
我正在看一个web应用程序，它使用JDBC连接连接到Oracle11g数据库（11.2.0）。应用程序在一段时间内（大约一小时）不会出现任何问题，然后我得到：Oracle11g ORA-12505，TNS：一段时间后，侦听器目前不知道Tomcat应用程序中连接描述符中给出的SID,oracle11g,tnsnames,tns,Oracle11g,Tnsnames,Tns,我正在看一个web应用程序，它使用JDBC连接连接到Oracle11g数据库（11.2.0）。应用程序在一段时间内（大约一小时）不会出现任何问题，然后我得到： 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 我尝试重新
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
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)
)
)
String serverName = "localhost";
String portNumber = "1521";
String sid = "xe";
String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
String username = "xxx";
String password = "yyy";
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
我想知道为什么我在一段时间后会遇到这个异常，以及如何修复它。如果没有，我如何在不重新启动机器的情况下绕过它？谢谢。数据库URL应如下所示
// Create DataSource and connect to the local database
ods = new OracleDataSource();
ods.setURL("jdbc:oracle:thin:@//localhost:5221/orcl");
ods.setUser("HR");
ods.setPassword("hr");
conn = ods.getConnection();