我正在使用Oracle Express（XE）并通过JDBC连接到它。该代码实现了通用连接池（UCP）。
出于某种原因，当我尝试获得新连接时，我得到：
java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource
我正在使用maven运行我的tomcat服务器
mvn tomcat7:run
我是否需要在pom.xml或Oracle本身添加任何额外配置才能使UCP正常工作？
这是stacktrace：
java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:541)
at oracle.ucp.jdbc.PoolDataSourceImpl.throwSQLException(PoolDataSourceImpl.java:588)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:277)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:647)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:614)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:608)
at com.websitepros.sql.UCPConnectionPoolImpl.borrowConnection(UCPConnectionPoolImpl.java:268)
at com.websitepros.sql.ConnectionFactoryImpl.borrowConnection(ConnectionFactoryImpl.java:60)
at com.websitepros.sql.ConnectionFactoryImpl.getConnection(ConnectionFactoryImpl.java:49)
at com.websitepros.sql.Table.getConnection(Table.java:196)
at com.websitepros.matrix.dataobjects.tables.PartnersTable.selectAll(PartnersTable.java:513)
at com.websitepros.util.PartnerTreeUtil.buildMap(PartnerTreeUtil.java:92)
at com.websitepros.util.PartnerTreeUtil.<init>(PartnerTreeUtil.java:38)
at com.websitepros.util.dbproperties.DBPartnerProperties.load(DBPartnerProperties.java:44)
at com.websitepros.util.PropertiesUtil.getProperties(PropertiesUtil.java:47)
at com.websitepros.util.PropertiesUtil.getProperties(PropertiesUtil.java:35)
at com.rocktide.integration.mip.PartnerAttributes.<init>(PartnerAttributes.java:76)
at com.rocktide.integration.mip.BuilderEnvironment.createPartnerAttributes(BuilderEnvironment.java:68)
at com.rocktide.integration.mip.BuilderEnvironment.createPartnerAttributes(BuilderEnvironment.java:53)
at com.websitepros.matrix.partners.hermes.Authenticate.serviceRequest(Authenticate.java:74)
at com.websitepros.servlet.WebComGenericServlet.doPost(WebComGenericServlet.java:31)
at com.websitepros.servlet.WebComGenericServlet.doGet(WebComGenericServlet.java:24)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)
Caused by: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:421)
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:389)
at oracle.ucp.jdbc.DriverConnectionFactoryAdapter.createConnection(DriverConnectionFactoryAdapter.java:134)
at oracle.ucp.common.UniversalConnectionPoolImpl$UniversalConnectionPoolInternal.createOnePooledConnectionInternal(UniversalConnectionPoolImpl.java:1613)
at oracle.ucp.common.UniversalConnectionPoolImpl$UniversalConnectionPoolInternal.access$600(UniversalConnectionPoolImpl.java:1421)
at oracle.ucp.common.UniversalConnectionPoolImpl.createOnePooledConnection(UniversalConnectionPoolImpl.java:488)
at oracle.ucp.common.UniversalConnectionPoolImpl.addNewConnections(UniversalConnectionPoolImpl.java:988)
at oracle.ucp.common.UniversalConnectionPoolBase.getInitialConnections(UniversalConnectionPoolBase.java:541)
at oracle.ucp.common.UniversalConnectionPoolBase.start(UniversalConnectionPoolBase.java:655)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:271)
... 37 more
Caused by: 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
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
at oracle.ucp.jdbc.DriverConnectionFactoryAdapter.createConnection(DriverConnectionFactoryAdapter.java:130)
... 44 more
Caused by: oracle.net.ns.NetException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:385)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
... 49 more
答案 0 :(得分：0)
我通过执行以下操作修复了此问题：
1）在我的tnsnames.ora中，我添加了：
(SID = XE)
到
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Lenovo-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
(SID = XE)
)
)
2）在listener.ora中，我补充道：
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
)
为：
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
)
)
3）重新启动了OracleServiceXE和OracleXETNSListener，它运行了
同样在检查了堆栈跟踪后，我看到这个问题被多次询问，但它有很多不同的答案，所以这将是我的沙粒：）