| [higgins-dev] Problems running STS on Tomcat6 using JVM 1.6.x |
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Mike,
Working with Pam Dingle, we have discovered a problem running the STS on Tomcat6 using a 1.6.x JVM.
The root cause of the problem is that the 1.6.x JVM apparently has a built-in version of the javax.xml.stream.XMLOutputFactory class that is not the precisely compatible with the XMLOutputFactory class that we supply in the stax-api-1.0.1.jar file. There is a subtle difference in what methods are available. The stax-api-1.0.1.jar file has the following method:
javax.xml.stream.XMLOutputFactory newInstance( String, ClassLoader);
while the one in the 1.6.x JVM (inside rt.jar) has the following method:
javax.xml.stream.XMLInputFactory newInstance( String, ClassLoader);
Basically, the 1.6.x JVM version returns an XMLInputFactory object instead of an XMLOutputFactory object.
The axiom code expects to be able to call a newInstance method that returns an XMLOutputFactory object. It is called called in the following stack:
org.apache.axiom.om.util.StAXUtils.getXMLOutputFactory(StAXUtils.java:97) org.apache.axiom.om.util.StAXUtils.createXMLStreamWriter(StAXUtils.java:111) org.apache.axiom.om.impl.llom.OMNodeImpl.serialize(OMNodeImpl.java:381)
org.eclipse.higgins.sts.utilities.XMLHelper.toDOM(XMLHelper.java:464)
...
but the method is not available in the 1.6.x version of the XMLOutputFactory class. This is going to be a problem for folks running on a 1.6.x JVM, because the builtin XMLOutputFactory class takes precedence over the one in stax-api-1.0.1.jar when the JVM loads classes.
Sigh....
Any thoughts? or workarounds? Anyone?
Daniel |