Error while obtaining JCO connection in ESS Portal

Hi All,

In my Portal using the ESS applications .while using suddenly what happend i dont know i am getting the below error msg

com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscapeException: Error while obtaining JCO connection.

at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:135)

at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:143)

at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractSystemLandscapeFactory$1.getJCOClientConnection(AbstractSystemLandscapeFactory.java:120)

at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.getJCOClientConnection(WDSystemLandscape.java:43)

at com.sap.pcuigp.xssfpm.wd.BackendConnections.connectModelInternal(BackendConnections.java:317)

at com.sap.pcuigp.xssfpm.wd.BackendConnections.initBackend(BackendConnections.java:266)

at com.sap.pcuigp.xssfpm.wd.BackendConnections.connectModel(BackendConnections.java:167)

at com.sap.pcuigp.xssfpm.wd.wdp.InternalBackendConnections.connectModel(InternalBackendConnections.java:229)

at com.sap.pcuigp.xssfpm.wd.FPMComponent$FPM.connectModel(FPMComponent.java:864)

at com.sap.pcuigp.xssfpm.wd.FPMComponent$FPMProxy.connectModel(FPMComponent.java:1094)

at com.sap.pcuigp.xssfpm.wd.BackendConnections.init(BackendConnections.java:155)

at com.sap.pcuigp.xssfpm.wd.wdp.InternalBackendConnections.init(InternalBackendConnections.java:225)

at com.sap.pcuigp.xssfpm.wd.FPMComponent.wdDoInit(FPMComponent.java:204)

at com.sap.pcuigp.xssfpm.wd.wdp.InternalFPMComponent.wdDoInit(InternalFPMComponent.java:105)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent.doInit(DelegatingComponent.java:161)

at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:227)

at com.sap.tc.webdynpro.progmodel.components.Component.initController(Component.java:258)

at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:206)

at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:590)

at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.doPreprocessing(ClientApplication.java:1457)

at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doPreprocessing(ApplicationSession.java:660)

at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:349)