java.net.ConnectException: Connection refused: connect

java.net.DualStackPlainSocketImpl.waitForConnect(DualStackPlainSocketImpl.java.-2)

java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java.85)

java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java.350)

java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java.206)

java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java.188)

java.net.PlainSocketImpl.connect(PlainSocketImpl.java.172)

java.net.SocksSocketImpl.connect(SocksSocketImpl.java.392)

java.net.Socket.connect(Socket.java.589)

oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java.149)

oracle.net.nt.ConnOption.connect(ConnOption.java.133)

oracle.net.nt.ConnStrategy.execute(ConnStrategy.java.405)

oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java.454)

oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java.693)

oracle.net.ns.NSProtocol.connect(NSProtocol.java.347)

oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java.1140)

oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java.340)

oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java.553)

oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java.254)

oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java.32)

oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java.528)

com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java.1461)

com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java.1525)

com.fr.third.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java.2165)