java.exe taking so much cpu usage

Hello,

Recently we are seeing the java.exe taking so much cpu usage in Web server in production and there are some java errors occrus in log file.  

<May 6, 2008 12:56:34 PM CDT> <Error> <HTTP> <cssp01> <PIA> <ExecuteThread: '49' for queue: 'weblogic.kernel.Default'> <<anonymous>> <> <BEA-101046> <[ServletContext(id=10609370,name=PORTAL,context-path=)]
bea.jolt.ApplicationException: TPESVCFAIL - application level service failure
      at bea.jolt.JoltRemoteService.decodeCALL(JoltRemoteService.java:429)
      at bea.jolt.JoltRemoteService.call(JoltRemoteService.java:335)
      at bea.jolt.JoltRemoteService.call(JoltRemoteService.java:257)
      at psft.pt8.net.NetReqRepSvc.sendRequest(NetReqRepSvc.java:556)
      at psft.pt8.net.NetService.requestService(NetService.java:141)
      at psft.pt8.net.NetReqRepSvc.requestService(NetReqRepSvc.java:330)
      at psft.pt8.jb.JBEntry.processRequest(JBEntry.java:336)
      at psft.pt8.psc.onActionGen(psc.java:1554)
      at psft.pt8.psc.onAction(psc.java:1065)
      at psft.pt8.psc.service(psc.java:560)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
      at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
      at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
      at psft.pt8.psfilter.doFilter(psfilter.java:76)
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
      at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6356)
      at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
      at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
      at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
      at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
      at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
      at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)


Can you please explain what is the problem here?  How can we exactly identify the problem?

WE are using
PeopleTools 8.45.18
Application: CRM 8.9
Database: SQL 2000 SP3a
Weblogic 8.1 SP5
Tuxwdo 8.1
jdk142_12
OS 2000

Please see the log file.  
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