Posts Tagged ‘Failed to read schema document’
Spring: Failed to read schema document
Case
I try to deploy a Mule ESB configuration, using this XML:
[xml]<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:pattern="http://www.mulesoft.org/schema/mule/pattern"
xsi:schemaLocation="http://www.mulesoft.org/schema/mule/core
http://www.mulesoft.org/schema/mule/core/3.1/mule.xsd
http://www.mulesoft.org/schema/mule/pattern
http://www.mulesoft.org/schema/mule/pattern/3.1/mule-pattern.xsd
">
<pattern:simple-service name="authenticationService"
address="http://localhost:1234/authenticationService"
component-class="lalou.jonathan.esb.components.AuthenticationComponent"
type="direct" />
</mule>[/xml]
I get the following error:
[java]Ignored XML validation warning
org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document ‘http://www.mulesoft.org/schema/mule/pattern/3.1/mule-pattern.xsd'[/java]
Extended Stacktrace
[java]2011-11-22 16:10:25,375 WARN xml.XmlBeanDefinitionReader – Ignored XML validation warning
org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document ‘http://www.mulesoft.org/schema/mule/pattern/3.1/mule-pattern.xsd’, because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(ErrorHandlerWrapper.java:96)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:380)[/java]
Notice that Mule ESB files are similar to classic Spring files. Of course, I first checked the pointed XSD was actually reachable.
Anyway, this error should be raised when your application, for any reason -firewall, proxies, network interruption-, cannot access the remote site where the XSD is hosted.
Fix
- Copy the XSD to a local folder
- Create a file
spring.schemas - Make it available in the classpath in
META-INF. - Add the following line
- [java]http\://www.mulesoft.org/schema/mule/pattern/3.1/mule-pattern.xsd=WEB-INF/classes/mule-pattern.xsd[/java]
The pattern is:
missing resource (beware of escaping colon) = path in classpath of the local XSD - Rebuild, pack and run!