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我正在尝试设置Vibur DBCP以针对 Oracle 11g 数据库实例工作，但我不断收到 Oracle 异常。

这是 URL = jdbc:oracle:thin:@//db.vonagenetworks.net/MY_SERVICE

当我将它与我们的 Tomcat 连接池一起使用时，此 URL 有效。

我收到以下错误......

org.vibur.dbcp.ViburDBCPException: java.sql.SQLException: Listener refused the connection with the following error:
ORA-12516, TNS:listener could not find available handler with matching protocol stack

    at org.vibur.dbcp.pool.ConnectionFactory.create(ConnectionFactory.java:114) ~[vibur-dbcp-1.1.1.jar:?]
    at org.vibur.dbcp.pool.ConnectionFactory.create(ConnectionFactory.java:53) ~[vibur-dbcp-1.1.1.jar:?]
    at org.vibur.objectpool.ConcurrentLinkedPool.create(ConcurrentLinkedPool.java:119) ~[vibur-object-pool-2.0.0.jar:?]
    at org.vibur.objectpool.ConcurrentLinkedPool.<init>(ConcurrentLinkedPool.java:110) ~[vibur-object-pool-2.0.0.jar:?]
    at org.vibur.dbcp.pool.PoolOperations.<init>(PoolOperations.java:73) ~[vibur-dbcp-1.1.1.jar:?]
    at org.vibur.dbcp.ViburDBCPDataSource.start(ViburDBCPDataSource.java:196) ~[vibur-dbcp-1.1.1.jar:?]
    at contactmanager.dao.DataSourceInitializer.initializeDataSources(DataSourceInitializer.java:96) [DataSourceInitializer.class:?]
    at contactmanager.dao.DataSourceInitializer.init(DataSourceInitializer.java:49) [DataSourceInitializer.class:?]
    at javax.servlet.GenericServlet.init(GenericServlet.java:160) [servlet-api.jar:3.0.FR]
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280) [catalina.jar:7.0.47]
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193) [catalina.jar:7.0.47]
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088) [catalina.jar:7.0.47]
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176) [catalina.jar:7.0.47]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460) [catalina.jar:7.0.47]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.47]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) [catalina.jar:7.0.47]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) [catalina.jar:7.0.47]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633) [catalina.jar:7.0.47]
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:983) [catalina.jar:7.0.47]
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1660) [catalina.jar:7.0.47]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_17]
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) [?:1.7.0_17]
    at java.util.concurrent.FutureTask.run(FutureTask.java:166) [?:1.7.0_17]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_17]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_17]
    at java.lang.Thread.run(Thread.java:722) [?:1.7.0_17]
Caused by: java.sql.SQLException: Listener refused the connection with the following error:
ORA-12516, TNS:listener could not find available handler with matching protocol stack

    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:458) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521) ~[ojdbc6.jar:11.2.0.3.0]
    at java.sql.DriverManager.getConnection(DriverManager.java:579) ~[?:1.7.0_17]
    at java.sql.DriverManager.getConnection(DriverManager.java:221) ~[?:1.7.0_17]
    at org.vibur.dbcp.pool.ConnectionFactory.doCreate(ConnectionFactory.java:139) ~[vibur-dbcp-1.1.1.jar:?]
    at org.vibur.dbcp.pool.ConnectionFactory.create(ConnectionFactory.java:110) ~[vibur-dbcp-1.1.1.jar:?]
    ... 25 more
Caused by: oracle.net.ns.NetException: Listener refused the connection with the following error:
ORA-12516, TNS:listener could not find available handler with matching protocol stack

    at oracle.net.ns.NSProtocol.connect(NSProtocol.java:395) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1102) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:320) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32) ~[ojdbc6.jar:11.2.0.3.0]
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521) ~[ojdbc6.jar:11.2.0.3.0]
    at java.sql.DriverManager.getConnection(DriverManager.java:579) ~[?:1.7.0_17]
    at java.sql.DriverManager.getConnection(DriverManager.java:221) ~[?:1.7.0_17]
    at org.vibur.dbcp.pool.ConnectionFactory.doCreate(ConnectionFactory.java:139) ~[vibur-dbcp-1.1.1.jar:?]
    at org.vibur.dbcp.pool.ConnectionFactory.create(ConnectionFactory.java:110) ~[vibur-dbcp-1.1.1.jar:?]
    ... 25 more
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1 回答 1

3

当 Oracle 数据库服务器用尽可用进程并且因此无法与服务器建立更多新连接时，这似乎是一个常见问题。请检查此链接和此链接以获取更多详细信息。

第二个链接建议可以通过以下方式增加 Oracle 数据库中的进程数：alter system set processes=100 scope=spfile;

我认为最好将 Oracle 中的进程数设置为比您为 vibur-dbcp 配置的最大连接数略高的数字，即如果您已配置 poolMaxSize=100，则设置Oracle 中的进程数增加到 150。如果多个应用程序连接到同一个 Oracle 数据库服务器，您可能需要将 poolMaxSize 乘以连接的应用程序数，然后再添加一些多余的 50 或 100。

请让我知道这是否有帮助。

于 2014-07-02T22:39:31.770 回答