I believe I have found a possible issue in the
org.apache.cxf.jaxws.interceptors.SwAOutInterceptor. The functionality appears
to have changed between 2.1.3 and 2.2.1. I'm not sure which is the correct
functionality so I thought I'd post here first.
This problem occurs when you have a JAXBContextImplementation that does not
have a hasSwaRef method. I found this issue when moving a service from Tomcat
to WebSphere. IBM uses a different implementation of JAXBContext by default
and IBM's version doesn't have a hasSwaRef method on it.
In 2.2.1 this results in a NullPointerException in this block of code:
1 private boolean callSWARefMethod(JAXBContext ctx) {
2 Method m = SWA_REF_METHOD.get(ctx.getClass().getName());
3 if (m == null &&
!SWA_REF_METHOD.containsKey(ctx.getClass().getName())) {
4 try {
5 m = ctx.getClass().getMethod("hasSwaRef", new Class[0]);
6 } catch (Exception e) {
7 //ignore
8 }
9 SWA_REF_METHOD.put(ctx.getClass().getName(), m);
10 }
11 try {
12 return (Boolean)m.invoke(ctx);
13 } catch (Exception e) {
14 return false;
15 }
16 }
This throws the NPE at line 9 SWA_REF_METHOD.put(ctx.getClass().getName(), m);
because m is null. In JDK 1.6.07 ConcurrentHashMap.put() throws a
NullPointerException when the value is null. This causes a SOAPFault to be
returned to the client.
I believe that this code should just return false if the hasSwaRef method
doesn't exist (which is how this operates in 2.1.3). If the put() wasn't
called when m is null, then this code should return true if the method exists
and false if it doesn't.
Fortunately, I can work around this by setting the javax.xml.bind.JAXBContext
system property to the Sun version (com.sun.xml.bind.v2.ContextFactory) which
returns a JAXBContext that implements hasSwaRef().
Let me know if you need any more information from me regarding this issue, I
didn't post it to JIRA since I wasn't sure if the code was performing correctly
yet.
Matt Ault
Systems and Technology
Elavon
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