How do I make Weblogic 10 prefer the jars in myApp.war:/WEB-INF/lib/ without throwing VerifyErrors?

Question

The Weblogic classloader seems to prefer system libraries over the libraries in my war's WEB-INF/lib/.

I've tried setting the following in WEB-INF/weblogic.xml, without success:

<weblogic-web-app>
    <container-descriptor>
        <prefer-web-inf-classes>true</prefer-web-inf-classes>
    </container-descriptor>
</weblogic-web-app>

This just gives me a lot of VerifyErrors:

exception is java.lang.VerifyError: (class: org/apache/xerces/parsers/AbstractSAXParser, method: parse signature: (Lorg/xml/sax/InputSource;)V) Incompatible object argument for function call
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:730)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:196)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1003)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:907)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        Truncated. see log file for complete stacktrace

(I'm trying to avoid packaging the WAR into an EAR.)

prefer-web-inf-classes should work, I assume you've cleared out all temp folders and cached copies of the war within the domain? — JoseK, Jun 08 '11 at 12:44
Is this to do with the JAXP libraries that Weblogic helpfully includes in your war's classpath? — artbristol, Jun 08 '11 at 14:39
There is a new option in WebLogic to use the perfer-application-packages in WAR files. What version are you using? — Jeff West, Jun 09 '11 at 19:26
@artbristol: It looks like Weblogic have already loaded Sax components into the classpath, which crashes with differently versioned Sax in the War. — neu242, Jun 15 '11 at 06:24
WebLogic enables you to do bottoms-up classloading which loads from the WAR/EAR first, getting around the clashes. — Jeff West, Jun 18 '11 at 00:31
11g has multiple releases. Are you using 10.3.3 or 10.3.4, perhaps? — Jeff West, Jun 18 '11 at 00:31
If you want to continue the conversation, email me at jeffrey.west@oracle.com. Easier than message board for iterative work. We can post the result here. — Jeff West, Jun 18 '11 at 00:33

score 5 · Answer 1 · answered Jun 15 '11 at 07:55

I was never able to fix this satisfactorily, other than by specifying -Djavax.xml.parsers.SAXParserFactory=[xerces sax parser factory class name] (and so on for the other JAXP factories like validation SchemaFactory) when starting Weblogic.

None of the filtering / prefer-web-inf stuff worked, possibly due to Weblogic requiring JAXP libraries on startup before it even reads any of the WAR / EAR config files.

score 0 · Answer 2 · answered Aug 24 '11 at 10:02

0

I had this problem too with tomcat-arquillian. Turns out "xml-apis 2.0.2" was in my classpath, which is actually xml-apis 1.0.b2 and which is too old to be compatible with xercesImpl 2.9.1 which requires xml-apis 1.3.04.

answered Aug 24 '11 at 10:02

Geoffrey De Smet

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How do I make Weblogic 10 prefer the jars in myApp.war:/WEB-INF/lib/ without throwing VerifyErrors?

2 Answers2