NPE in HstSiteServer

10.10.2012 10:27:15 WARN [org.hippoecm.hst.container.HstFilter.doFilter():435] Fatal error encountered while processing request '/site/ping/':

• java.lang.NullPointerException
  at org.hippoecm.hst.configuration.site.HstSiteService.<init>(HstSiteService.java:75)
  at org.hippoecm.hst.configuration.hosting.MountService.<init>(MountService.java:505)
  at org.hippoecm.hst.configuration.hosting.VirtualHostService.<init>(VirtualHostService.java:240)
  at org.hippoecm.hst.configuration.hosting.VirtualHostService.<init>(VirtualHostService.java:254)
  at org.hippoecm.hst.configuration.hosting.VirtualHostService.<init>(VirtualHostService.java:254)
  at org.hippoecm.hst.configuration.hosting.VirtualHostService.<init>(VirtualHostService.java:254)
  at org.hippoecm.hst.configuration.hosting.VirtualHostService.<init>(VirtualHostService.java:254)
  at org.hippoecm.hst.configuration.hosting.VirtualHostsService.<init>(VirtualHostsService.java:207)
  at org.hippoecm.hst.configuration.model.HstManagerImpl.buildSites(HstManagerImpl.java:565)
  at org.hippoecm.hst.configuration.model.HstManagerImpl.getVirtualHosts(HstManagerImpl.java:240)
  at org.hippoecm.hst.container.HstFilter.doFilter(HstFilter.java:266)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.hippoecm.hst.container.XSSUrlFilter.doFilter(XSSUrlFilter.java:49)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
  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.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  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:859)
  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
  at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:396)
  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)