What does this web.xml error mean?

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";'

Sometimes it is a bug in Eclipse. Take a look how to disable the validation: https://stackoverflow.com/questions/67271527/eclipse-language-servers-there-is-1-error-in-javaee-7-xsd — 30thh, Dec 10 '21 at 08:43

Sazzadur Rahaman · Accepted Answer · 2015-06-07T08:43:49.403

69

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).

edited Jun 07 '15 at 08:43

answered Nov 18 '12 at 04:56

Sazzadur Rahaman

6,938
1
30
52

4

wtf..this is annoying! – Jakob Hohlfeld Apr 10 '14 at 12:41
3

@jhohlfeld the list of schemas by release is currently here: http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/index.html Schemas java <= 1.4 are use j2ee and schemas for >= 1.5 use javaee – Tim Perry Feb 20 '15 at 19:41
3

I have this declaration and the error is still present – Ronye Vernaes Mar 20 '15 at 18:50
@Satzzadur Rahaman Can you explain why this is showing error? – Sanshayan Jun 06 '15 at 15:51
In case it is not working as for @RonyeVernaes, check out this other question: https://stackoverflow.com/questions/32538754/eclipse-web-xml-referenced-file-error – Daniel Rodríguez Sep 06 '18 at 12:13
im getting errors for this – deepakl.2000 Aug 05 '22 at 17:19

score 53 · Answer 2 · edited May 30 '13 at 13:39

53

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 :)

edited May 30 '13 at 13:39

demongolem

9,474
36
90
105

answered May 30 '13 at 13:21

Stackoverflow1979

531
4
2

4

What is the reasoning to do this? The error did go away, but I don't know what will be side effects – Wand Maker Jul 03 '13 at 13:23
1

When I use this declaration, the validator says that "Cannot find the declaration of element'web-app'" – Ronye Vernaes Mar 20 '15 at 18:51
After adding a semicolon in my case (is a faces-config) the error (not on my mac eclipse only in my linux eclipse) went away but got a warning message: no grammar constraints (DTD or XML Schema) referenced in the document. – Kemin Zhou Jan 11 '19 at 22:28

score 12 · Answer 3 · edited Sep 11 '17 at 18:54

12

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">

edited Sep 11 '17 at 18:54

Tot Zam

8,406
10
51
76

answered Sep 11 '17 at 17:53

Thái Ngô

246
3
3

Maitry Gohil · Answer 4 · 2021-07-04T19:14:14.270

9

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."

edited Jul 04 '21 at 19:14

answered Jul 04 '21 at 18:57

Maitry Gohil

101
2
8

Mohan · Answer 5 · 2017-07-15T13:06:28.900

2

In my case, I had replaced

xsi:schemaLocation="http://java.sun.com/../.."

with

xsi:schemaLocation="http://xmlns.jcp.org/../.."

Cheers!

edited Jul 15 '17 at 13:06

answered Apr 22 '17 at 07:23

Mohan

4,755
2
27
20

score 1 · Answer 6 · answered Nov 18 '12 at 04:52

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.

score 0 · Answer 7 · edited Feb 12 '21 at 15:47

0

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"

edited Feb 12 '21 at 15:47

ranka47

995
8
25

answered Feb 11 '21 at 13:27

Roshan

21
3

What does this web.xml error mean?

7 Answers7

Linked