Opening the link in cluster DB Administration tab page failed

Hi Experts,
I'm a SC from North China.
Now I'm setting up a Grid Control PoC environment for a customer.
The installation and configuration have been finished successfully.
But when we tried to show DB administration function some issues happened.
The issue is that we can not open any links in Administration tab of a DB instance which belongs to a 2 nodes RAC.
We will get an error just like "Error:Java.sql.SQLException:Closed Connection" in the page.
For example, Click "Tablespaces" link.
It is so strange that we can open those links from the Administration tab page in the cluster DB page.
It needs about half minute to open those links.
So if someone knows about this issue please tell me how we can troubleshoot this issue.
Thank you in advance.
Envirnonment:
OMS server: Windows2003, OMS 10.2.0.4
Agent:AIX 5.3, Agent 10.2.0.4, 2 nodes 10g RAC.
The customer is doing some other DB testing on the node2. Some time the node2 is very slow.
emoms.log example:
2009-04-20 09:51:49,828 [EMUI_09_51_49_/console/database/storage/controlfile] ERROR adm.misc logException.3615 - oracle.sysman.emSDK.admObj.AdminObjectException: Closed Connection
2009-04-21 11:00:02,140 [EMUI_11_00_02_/console/database/instance/waitDetails] ERROR perf.waits setEMConnection.119 - java.sql.SQLException: Closed Connection
Edited by: user610819 on 2009-4-21 下午11:36

Hi there, I'm wondering if you've found a resolution. I've found a similar error with a non-RAC database being monitored by a 10.2.0.5 OMS/Grid Control on Windows 2003 Enterprise SP2. From the Storage --> Control Files --> click "Backup to Trace" and the following error pops up immediately:
"Error
Failed backup control file object: Closed Connection"
And then on the OMS in the emoms.trc:
09-10-29 16:07:44,033 [EMUI_16_07_44_/console/database/storage/controlfile] ERROR adm.misc logException.3664 - oracle.sysman.emSDK.admObj.AdminObjectException: Closed Connection
     at oracle.sysman.emo.adm.storage.controlfile.DBControlfileInitializer.initializeGeneral(DBControlfileInitializer.java:207)
     at oracle.sysman.emo.adm.storage.controlfile.DBControlfileInitializer.initialize(DBControlfileInitializer.java:114)
     at oracle.sysman.emo.adm.DBObject.initialize(DBObject.java:177)
     at oracle.sysman.db.adm.stg.ControlfileController.getControlfileBean(ControlfileController.java:423)
     at oracle.sysman.db.adm.stg.ControlfileController.getBean(ControlfileController.java:282)
     at oracle.sysman.db.adm.DBController.validateFileNameState(DBController.java:3493)
     at oracle.sysman.db.adm.DBController.handleEvent(DBController.java:3291)
     at oracle.sysman.emSDK.svlt.PageHandler.handleRequest(PageHandler.java:578)
     at oracle.sysman.db.adm.RootController.handleRequest(RootController.java:247)
     at oracle.sysman.db.adm.DBController.handleRequest(DBController.java:3008)
     at oracle.sysman.db.adm.DBControllerResolver.handleRequest(DBControllerResolver.java:114)
     at oracle.sysman.emSDK.svlt.EMServlet.myDoGet(EMServlet.java:777)
     at oracle.sysman.emSDK.svlt.EMServlet.doGet(EMServlet.java:328)
     at oracle.sysman.eml.app.Console.doGet(Console.java:304)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.sysman.eml.app.EMRepLoginFilter.doFilter(EMRepLoginFilter.java:265)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
     at oracle.sysman.eml.app.BrowserVersionFilter.doFilter(BrowserVersionFilter.java:122)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:20)
     at oracle.sysman.emSDK.svlt.EMRedirectFilter.doFilter(EMRedirectFilter.java:102)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:20)
     at oracle.sysman.eml.app.ContextInitFilter.doFilter(ContextInitFilter.java:369)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:670)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:816)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:231)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:136)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
Edited by: shadowriderhope on Oct 29, 2009 4:15 PM

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