https://issues.apache.org/bugzilla/show_bug.cgi?id=49196
Summary: NPE in PageContext.getErrorData()
Product: Tomcat 6
Version: 6.0.26
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: bo...@folgmann.de
This bug is present in some older versions also, but I haven't had time until
now to file the report. Here it is:
I've got
<error-page>
<error-code>403</error-code>
<location>/free/login/denied.jsp</location>
</error-page>
in web.xml and call pageContext.getErrorData() in denied.jsp.
THIS WORKS FINE!
What does not work is if the user is HTTP-redirected to denied.jsp or simply
calls it by entering the URL in his browser. In this case the JSP throws
java.lang.NullPointerException
at javax.servlet.jsp.PageContext.getErrorData(PageContext.java:515)
at
org.apache.jsp.free.login.denied_jsp._jspService(denied_jsp.java:389)
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:377)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
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.folgmann.filters.AuthFilter.doFilter(AuthFilter.java:446)
at
com.folgmann.filters.HttpFilterSupport.doFilter(HttpFilterSupport.java:41)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
com.folgmann.filters.ValidatingThreadPoolFilter.doFilter(ValidatingThreadPoolFilter.java:138)
at
com.folgmann.filters.HttpFilterSupport.doFilter(HttpFilterSupport.java:41)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.folgmann.filters.CharsetFilter.doFilter(CharsetFilter.java:114)
at
com.folgmann.filters.HttpFilterSupport.doFilter(HttpFilterSupport.java:41)
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:465)
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:298)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)
at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
at java.lang.Thread.run(Thread.java:619)
I'm sure that this wasn't intended by the JSP spec. I suggest that
pageContext.getErrorData() returns null instead when an error page is not
called like an error page should be called.
Tnx,
boris
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