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oracle.net.ns.NetException: The Network Adapter could not establish the connection	at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:398)	at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:438)	at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:711)	at oracle.net.ns.NSProtocol.connect(NSProtocol.java:257)	at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1229)	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:326)	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:357)	at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(ConnectionEnvFactory.java:239)	at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1310)	at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1227)	at weblogic.common.resourcepool.ResourcePoolImpl.reserveResourceInternal(ResourcePoolImpl.java:451)	at weblogic.common.resourcepool.ResourcePoolImpl.reserveResource(ResourcePoolImpl.java:343)	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.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	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)	at weblogic.management.jmx.modelmbean.WLSModelMBean.getAttributes(WLSModelMBean.java:585)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttributes(DefaultMBeanServerInterceptor.java:709)	at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttributes(JmxMBeanServer.java:705)	at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase$13.run(WLSMBeanServerInterceptorBase.java:353)	at java.security.AccessController.doPrivileged(Native Method)	at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase.getAttributes(WLSMBeanServerInterceptorBase.java:351)	at weblogic.management.mbeanservers.internal.JMXContextInterceptor.getAttributes(JMXContextInterceptor.java:192)	at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase$13.run(WLSMBeanServerInterceptorBase.java:353)	at java.security.AccessController.doPrivileged(Native Method)	at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase.getAttributes(WLSMBeanServerInterceptorBase.java:351)	at weblogic.management.mbeanservers.internal.SecurityInterceptor.getAttributes(SecurityInterceptor.java:307)	at weblogic.management.jmx.mbeanserver.WLSMBeanServer.getAttributes(WLSMBeanServer.java:292)	at oracle.as.jmx.framework.generic.BaseMBeanServerInterceptor.getAttributes(BaseMBeanServerInterceptor.java:191)	at oracle.as.jmx.framework.wls.spi.security.SuperPrivilegedMBeanServerInterceptor$2.run(SuperPrivilegedMBeanServerInterceptor.java:94)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)	at oracle.as.jmx.framework.wls.spi.security.SuperPrivilegedMBeanServerInterceptor.getAttributes(SuperPrivilegedMBeanServerInterceptor.java:99)	at oracle.dms.impl.producer.MetricConvertor.getColumnValues(MetricConvertor.java:384)	at oracle.dms.impl.producer.MetricConvertor.getTable(MetricConvertor.java:342)	at oracle.dms.impl.producer.J2EETableSource.getTable(J2EETableSource.java:91)	at oracle.dms.table.MultiTableSource.getTable(MultiTableSource.java:107)	at oracle.dms.table.TableSource.getTables(TableSource.java:276)	at oracle.dms.aggregator.Storage.getTables(Storage.java:712)	at oracle.dms.aggregator.Sampler._sampleTable(Sampler.java:710)	at oracle.dms.aggregator.Sampler._setOff(Sampler.java:675)	at oracle.dms.aggregator.Sampler.access$200(Sampler.java:43)	at oracle.dms.aggregator.Sampler$SampleTask.run(Sampler.java:846)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at oracle.dms.aggregator.DmsThreadFactory$1$1.run(DmsThreadFactory.java:56)	at java.security.AccessController.doPrivileged(Native Method)	at oracle.dms.aggregator.DmsThreadFactory$1.run(DmsThreadFactory.java:51)	at java.lang.Thread.run(Thread.java:745)