https://issues.apache.org/bugzilla/show_bug.cgi?id=56665
Bug ID: 56665
Summary: XML schema validation exception for effective web.xml
generated for servlet-mapping with empty url-pattern
Product: Tomcat 7
Version: 7.0.54
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
I am observing this with the current Tomcat 7 (built from revision 1605072)
If the following 3 conditions are met:
1) Server is running in "strict compliance" mode
2) There is a servlet that is mapped to context root using URL pattern ""
(empty string) - per Servlet 3.0 mrel spec chapter 12.2 Specification of
Mappings
Then whenever Tomcat tries to compile a JSP page, it fails when trying to
validate effective merged web.xml against the schema.
WORKAROUND:
To work around the issue I disabled XML validation for this specific context,
via <Context xmlValidation="false"/>
STEPS TO REPRODUCE:
1. Add the following mapping at the end of webapps/examples/WEB-INF/web.xml:
[[[
<servlet-mapping>
<servlet-name>RequestInfoExample</servlet-name>
<url-pattern />
</servlet-mapping>
]]]
2. Configure Tomcat in "strict compliance" mode by adding the following line to
conf/catalina.properties:
org.apache.catalina.STRICT_SERVLET_COMPLIANCE=true
3. Purge the work/ directory to remove compiled JSPs, if there are any.
4. Start Tomcat
5. Access http://localhost:8080/examples/
The "Request Information Example" page is shown. Thus the empty URL mapping is
working correctly.
6. Access a JSP page,
http://localhost:8080/examples/jsp/jsp2/el/basic-arithmetic.jsp
Expected: Some arithmetics demo page
Actual: Error 500
HTTP Status 500 - org.apache.jasper.JasperException: XML parsing error on file
org.apache.tomcat.util.scan.MergedWebXml: (line 176, col 21)
Stack Trace:
org.apache.jasper.JasperException: org.apache.jasper.JasperException: XML
parsing error on file org.apache.tomcat.util.scan.MergedWebXml: (line 176, col
21)
org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:230)
org.apache.jasper.compiler.JspConfig.init(JspConfig.java:243)
org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:302)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:114)
(...)
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