Error in Collaborator Log

 We have Demantra 731 environment live in PROD, suddenly we are observing following error in CWB. This errors are getting generated even if no activity is going in the system. Any pointer will be helpful,

2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: 
com.demantra.applicationServer.appServerExceptions.ApplicationServerException: ODPM-10004: Exception in class TempDatesList - method TempDatesList() : Date not 
available.
	at com.demantra.applicationServer.services.tempTable.TempDatesList.setTempDatesList(TempDatesList.java:62)
	at com.demantra.applicationServer.services.queryrun.TablesHandler.setDateList(TablesHandler.java:181)
	at com.demantra.applicationServer.services.queryrun.AbstractDataHandler.setTempDatesList(AbstractDataHandler.java:683)
	at com.demantra.applicationServer.services.queryrun.AbstractDataHandler.setDatesData(AbstractDataHandler.java:354)
	at com.demantra.applicationServer.services.queryrun.AbstractDataHandler.init(AbstractDataHandler.java:183)
	at com.demantra.applicationServer.services.queryrun.AbstractRunner.initRunner(AbstractRunner.java:112)
	at com.demantra.applicationServer.services.queryrun.CombRunner.getMembersData(CombRunner.java:73)
	at com.demantra.common.beans.ObjectBrowserBean.<init>(ObjectBrowserBean.java:105)
	at com.demantra.portal.beans.ObjectBrowserCache$UserCache.get(ObjectBrowserCache.java:99)
	at com.demantra.portal.beans.ObjectBrowserCache$UserCache.access$100(ObjectBrowserCache.java:84)
	at com.demantra.portal.beans.ObjectBrowserCache.get(ObjectBrowserCache.java:54)
	at org.apache.jsp.portal.objectbrowser_jsp._jspService(objectbrowser_jsp.java:291)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.demantra.common.servlets.ServerStartupFilter.doFilter(ServerStartupFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.demantra.common.utils.ParamEncodingFilter.doFilter(ParamEncodingFilter.java:27)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
	at java.lang.Thread.run(Unknown Source)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: org.apache.jsp.portal.objectbrowser_jsp._jspService(objectbrowser_jsp.java:400)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
2013-06-22 13:37:28,076 CDT [http-8080-20] ERROR appserver.error: javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
2013-06-22 13:37:28,076 CDT