What does this web.xml error mean? - schema

Question

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">
Referenced file contains errors (http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd). For more information, right click on the message in the Problems View and select "Show Details..."
The errors below were detected when validating the file "web-app_2_5.xsd" via the file "web.xml". In most cases these errors can be detected by validating "web-app_2_5.xsd" directly. However it is possible that errors will only occur when web-app_2_5.xsd is validated in the context of web.xml.
In details, I see a bunch of these:
s4s-elt-character: Non-whitespace characters are not allowed in schema elements other than xs:appinfo and xs:documentation. Saw 'var _U="undefined";'

Answer 1

If you replace j2ee by javaee, it will work fine.
EDIT :
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
Edit:
To know anything further related to this error. Please follow the Link. Here you will find schemas for Java EE deployment descriptors (web.xml).

Answer 2

replace
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">
with
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee;http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">
The solution is that you have to put semicolon between URLs
I am sure you will not get the error again :)

Answer 3

I suggest you add ; between 2 passages:
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee and http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
Like this:
:xsi:schemaLocation="http://java.sun.com/xml/ns/javaee;http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

Answer 4

Add semicolon between xsi:schemaLocation just as shown below
"http://java.sun.com/xml/ns/javaee;http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
This resolved my this error in <servlet-name> tag line as well.
"cvc-id.3: A field of identity constraint 'web-common-servlet-name-uniqueness' matched element 'web-app', but this element does not have a simple type."

Answer 5

In my case, I had replaced
xsi:schemaLocation="http://java.sun.com/../.."
with
xsi:schemaLocation="http://xmlns.jcp.org/../.."
Cheers!

Answer 6

On the surface it appears that the schemaLocation is wrong. Resolving it appears to redirect to a HTML page rather than a XSD schema.
I would suggest simply removing this line unless you really want to do XSD validation at runtime. Bear in mind the relevant parts will be validated by your servlet container.

Answer 7

Replacing the schemaLocation as below has resovled the error for me:
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/j2ee; http://xmlns.jcp.org/xml/ns/j2ee/web-app_2_4.xsd"