hi,everyone. I run jboss on windows, 9i oracle run on another station. at first, the all is ok, after a few days, occours the following error: 2006-07-10 05:04:15,828 WARN [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Io Exception: The Network Adapter could not establish the connection) at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:162) at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:519) at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:208) at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:566) at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:395) at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:320) at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:447) at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:888) at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:102) ...... at sun.reflect.GeneratedMethodAccessor170.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.invocation.Invocation.performCall(Invocation.java:345) at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:214) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185) at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:130) at org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(ServiceEndpointInterceptor.java:51) at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:105) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:335) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:166) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:139) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192) at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122) at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624) at org.jboss.ejb.Container.invoke(Container.java:873) at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:413) at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:88) at $Proxy70.uploadInfoFile(Unknown Source) at com.wri.nfh.cmms.comm.server.carrier.DealMessageRunable.updateObject(DealMessageRunable.java:385) at com.wri.nfh.cmms.comm.server.carrier.DealMessageRunable.run(DealMessageRunable.java:251) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) at java.lang.Thread.run(Thread.java:595) Caused by: java.sql.SQLException: Io Exception: The Network Adapter could not establish the connection at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:335) at oracle.jdbc.driver.OracleConnection.(OracleConnection.java:334) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:442) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321) at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:152) ... 37 more 2006-07-10 05:05:59,781 WARN [org.jboss.mq.Connection] Connection failure, use javax.jms.Connection.setExceptionListener() to handle this error and reconnect org.jboss.mq.SpyJMSException: No pong received; - nested throwable: (java.io.IOException: ping timeout.) at org.jboss.mq.Connection$PingTask.run(Connection.java:1323) at EDU.oswego.cs.dl.util.concurrent.ClockDaemon$RunLoop.run(ClockDaemon.java:364) at java.lang.Thread.run(Thread.java:595) Caused by: java.io.IOException: ping timeout. ... 3 more 1) after the above problem occoured, I could not my monitor, I could not remote login through mstsc.exe, ......., I only could access shared folder. 2) the oracle is normal, I could use sqlplus connect it and execute some sql. 3) when I view the connects using a sql, no connect from my jboss . is somebody tell me the reason. thanks first. 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