我有一个通过Windows Server 2012 r2在Tomcat8上运行的java servlet应用程序。 Oracle 11g r2在具有相同子网的不同机器上运行，因此java应用程序和oracle之间不存在防火墙。
java应用程序是多线程的，并且在高峰时段具有负载。
我的问题是;当一切都很好并且在异常发生时工作正常。
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor189.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.mulberry.request.MulberryRequestProcessor.run(MulberryRequestProcessor.java:168)
at com.mulberry.request.MulberryRequestProcessor.lambda$run$0(MulberryRequestProcessor.java:78)
at com.mulberry.request.MulberryRequestProcessor$$Lambda$32/461612128.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:277)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:181)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:699)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:633)
at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:186)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:127)
at com.mulberry.data.connection.ConnectionManager.getConnection(ConnectionManager.java:86)
at com.mulberry.data.MulberryOrm.getConnection(MulberryOrm.java:103)
at com.mulberry.data.MulberryOrm.insertMulti(MulberryOrm.java:201)
at com.mulberry.data.MulberryOrm.upsertMulti(MulberryOrm.java:192)
at com.aril.profile.service.impl.LprBulkdataService.saveLoadProfileData(LprBulkdataService.java:86)
... 11 more
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:230)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
... 25 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
... 30 more
在oracle网站上发生此异常时; 专用用户数：~5200 （还有超过1个tomcat instace以相同的目的运行）
oracle参数会话设置为12000 oracle运行机器也是带有64 cpu和96GB ram的windows server 2012
我正在使用tomcat jdbc连接池和应用程序在tomcat池下获取连接。
连接字符串是
jdbc:oracle:thin:@[IPADDRESS]:1521/[SERVICENAME]
服务器之间的以太网是10gbit，所以不要考虑网络延迟。
任何人都可以帮助我发现我的问题吗？
答案 0 :(得分：0)
你可以设置超时;
Properties props = new Properties();
props.setProperty("user", "dbuser");
props.setProperty("password", "dbpassword");
props.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_CONNECT_TIMEOUT, "2000");
Connection con = DriverManager.getConnection("<JDBC connection string>", props);