https://issues.apache.org/bugzilla/show_bug.cgi?id=53958
Priority: P2
Bug ID: 53958
Assignee: dev@tomcat.apache.org
Summary: Custom error page generates NPE in
StandardHostValve.java
Severity: normal
Classification: Unclassified
Reporter: sro...@gmail.com
Hardware: Macintosh
Status: NEW
Version: 7.0.30
Component: Catalina
Product: Tomcat 7
I've defined a custom error page, /error.jspx. When I access it directly in
Tomcat, the page serves, but I see this in the logs:
SEVERE: Exception Processing ErrorPage[errorCode=404, location=/error.jspx]
java.lang.NullPointerException
at
org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:456)
at
org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:327)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:193)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Because the page serves (it just says "Error!"), I believe that part is fine,
including its declaration as a JSPX file and such.
This error page is mapped to common error codes and exceptions too. I am using
Tomcat as an embedded server, so, proceeding like:
ErrorPage errorPage = new ErrorPage();
errorPage.setErrorCode(404);
errorPage.setLocation("/error.jspx");
context.addErrorPage(errorPage);
I also get the exception above when generating a 404 error on purpose. In this
case, the error page does not show; I see a default Tomcat error page.
It seems like the RequestDispatcher for the error page is null in this
situation. I am not sure why. I know it's null if the page is outside the web
app context, but it isn't here. I think. I am configuring the one and only
context for the web app thusly..
Context context = tomcat.addContext("/", contextPath.getAbsolutePath());
Is this my error? a bug?
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