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java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)	at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:678)	at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:234)	at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:34)	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:567)	at weblogic.jdbc.common.internal.ConnectionEnvFactory.makeConnection(ConnectionEnvFactory.java:359)	at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(ConnectionEnvFactory.java:241)	at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1322)	at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1239)	at weblogic.common.resourcepool.ResourcePoolImpl.reserveResourceInternal(ResourcePoolImpl.java:463)	at weblogic.common.resourcepool.ResourcePoolImpl.reserveResource(ResourcePoolImpl.java:352)	at weblogic.jdbc.common.internal.ConnectionPool.reserve(ConnectionPool.java:471)	at weblogic.jdbc.common.internal.ConnectionPool.reserve(ConnectionPool.java:368)	at weblogic.jdbc.common.internal.ConnectionPool.reserve(ConnectionPool.java:353)	at weblogic.jdbc.common.internal.DataSourceRuntimeMBeanImpl.lookupMetaData(DataSourceRuntimeMBeanImpl.java:740)	at weblogic.jdbc.common.internal.DataSourceRuntimeMBeanImpl.getMetaData(DataSourceRuntimeMBeanImpl.java:762)	at weblogic.jdbc.common.internal.DataSourceRuntimeMBeanImpl.getDriverName(DataSourceRuntimeMBeanImpl.java:794)	at sun.reflect.GeneratedMethodAccessor476.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at weblogic.management.jmx.modelmbean.WLSModelMBean.getAttribute(WLSModelMBean.java:525)