I have a little problem with removing attributes by Tomcat 6.0.18. This
happens after migrating from Tomcat 5.5.23 (on this version there wasn't
such error). Exception occur occasionally and for now I don't know how to
resolve it. Below there is a stack trace from error:
2008-10-16 07:53:52 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
at
org.apache.catalina.connector.Request.removeAttribute(Request.java:1354)
at
org.apache.catalina.connector.RequestFacade.removeAttribute(RequestFacade.java:514)
at
org.apache.myfaces.context.servlet.RequestMap.removeAttribute(RequestMap.java:59)
at
org.apache.myfaces.util.AbstractAttributeMap.remove(AbstractAttributeMap.java:124)
at
org.apache.myfaces.el.unified.resolver.FacesCompositeELResolver.unsetScope(FacesCompositeELResolver.java:163)
at
org.apache.myfaces.el.unified.resolver.FacesCompositeELResolver.invoke(FacesCompositeELResolver.java:152)
at
org.apache.myfaces.el.unified.resolver.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:104)
at
org.apache.myfaces.el.VariableResolverToApplicationELResolverAdapter.resolveVariable(VariableResolverToApplicationELResolverAdapter.java:45)
at
org.quamasoft.common.servlets.jsf.JsfServletUtils.getManagedBean(JsfServletUtils.java:52)
at
org.quamasoft.common.servlets.jsf.JsfServletUtils.getManagedBean(JsfServletUtils.java:57)
at
org.quamasoft.server.filters.LicensedActionServletFilter.doFilter(LicensedActionServletFilter.java:49)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
com.uhc.filters.JsfAuthenticationFilter.doFilter(JsfAuthenticationFilter.java:67)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.uhc.filters.SessionFilter.doFilter(SessionFilter.java:115)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.quamasoft.server.filters.ServletContextFilter.doFilter(ServletContextFilter.java:69)
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:219)
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:286)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Anyone know how to resolve it, please?
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