It seems that the following problem has something to do with jscookmenu
because the problem disappears once I remove jscookmenu related code from the
jsp page.
I use jsf(myfaces 1.1.1), tiles and jscookmenu.
A null pointer exception appears on the very first entry to a tiled page after
the application has loaded and the user has logged in. The exception
disappears when the user clicks the reload button of the browser. The same
exception also occurs after the user logs out of the session and re-enters.
The exception trace is shown below. Can anyone see what may cause this
problem to occur and how to fix it? The statement where the exception
happens is
contentTypeListString = (String)
context.getExternalContext().getRequestHeaderMap().get("Accept");
Thanks in advance.
===========================================================
java.lang.NullPointerException
at
org.apache.myfaces.renderkit.html.HtmlRendererUtils.selectContentType(HtmlRendererUtils.java:919)
at
org.apache.myfaces.component.html.util.AddResource.writeWithFullHeader(AddResource.java:443)
at
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain.access$000
(ApplicationFilterChain.java:50)
at
org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at
com.riihon.AAA.webapp.filter.ActionFilter.doFilter(ActionFilter.java:157)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain.access$000
(ApplicationFilterChain.java:50)
at
org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at
com.riihon.utils.webapp.filter.GZIPFilter.doFilter(GZIPFilter.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain.access$000
(ApplicationFilterChain.java:50)
at
org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:514)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
