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javaweblogicclassloaderxercesopensaml

Conflicts between JDK6 and xml-apis

After upgrading OpenSAML from 1.1 to 2.6.1, which needs xerces-impl dependency, the following stack appears on startup :

 Caused by: java.lang.ClassCastException: org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl cannot be cast to javax.xml.datatype.DatatypeFactory
       at javax.xml.datatype.DatatypeFactory.newInstance(DatatypeFactory.java:131) ~[xml-apis-1.4.01.jar:1.6.0_45]
       at com.sun.xml.bind.DatatypeConverterImpl.<clinit>(DatatypeConverterImpl.java:831) ~[glassfish.jaxb_1.0.0.0_2-1-12.jar:2.1.12]
       ... 68 common frames omitted

xerces-impl redefine some jre classes and comes with xml-apis which redefine some jre interfaces. org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl come from xerces-impl.

I'm on weblogic 10.3.5 and JDK 6.

I read Dealing with "Xerces hell" in Java/Maven? and try to exclude xml-apis but xerces-impl throws NoClassDefFoundError. Copying xml-apis and xerces-impl in jre/lib/endorsed throws ClassCastException too (http://docs.oracle.com/javase/6/docs/technotes/guides/standards/).

Adding -Djavax.xml.datatype.DatatypeFactory=com.sun.org.apache.xerces.internal.jaxp.datatype.DatatypeFactoryImpl on startup command throws :

 Caused by: java.lang.ClassCastException: org.apache.xerces.jaxp.SAXParserFactoryImpl cannot be cast to javax.xml.parsers.SAXParserFactory
    at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:128) ~[xml-apis-1.4.01.jar:1.6.0_45]
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.getXMLReader(AbstractUnmarshallerImpl.java:80) ~[na:1.6.0_45]

Then adding -Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl throws :

 Caused by: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl cannot be cast to javax.xml.parsers.SAXParserFactory
    at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source)
    at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:79)

I don't know what to do next. Any idea ?

Solution

  • In addition to javax.xml.bind as prefer-application

    <wls:package-name>javax.xml.bind.*</wls:package-name>

    in weblogic.xml, adding jaxb dependencies solved my problem :

    <dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-impl</artifactId>
    <version>${jaxb-impl.version}</version>
</dependency>
<dependency>
    <groupId>javax.xml.bind</groupId>
    <artifactId>jaxb-api</artifactId>
    <version>${jaxb-api.version}</version>
</dependency>