java.lang.UnsupportedOperationException when retrieving WS response

[ivan dal bosco]

Hello,

I am using class WS WebServiceTemplate to call a remote WS end point.
On the way back of the SOAP call, I come up with an UnsupportedOperationException in AbstractList#add. Here is the end of my stack trace:

Caused by: java.lang.UnsupportedOperationException
at java.util.AbstractList.add(AbstractList.java:131)
at java.util.AbstractList.add(AbstractList.java:91)
at org.springframework.xml.namespace.SimpleNamespaceC ontext.bindNamespaceUri(SimpleNamespaceContext.jav a:108)
at org.springframework.xml.stream.StaxStreamXmlReader .startPrefixMapping(StaxStreamXmlReader.java:171)
at org.springframework.xml.stream.StaxStreamXmlReader .handleStartElement(StaxStreamXmlReader.java:145)
at org.springframework.xml.stream.StaxStreamXmlReader .parseInternal(StaxStreamXmlReader.java:80)
at org.springframework.xml.stream.AbstractStaxXmlRead er.parse(AbstractStaxXmlReader.java:128)
at org.springframework.xml.stream.AbstractStaxXmlRead er.parse(AbstractStaxXmlReader.java:111)
at com.sun.org.apache.xalan.internal.xsltc.trax.Trans formerImpl.transformIdentity(TransformerImpl.java: 637)
at com.sun.org.apache.xalan.internal.xsltc.trax.Trans formerImpl.transform(TransformerImpl.java:708)
... 80 more

The cause is pretty clear: method SimpleNamespaceContext#bindNamespaceUri(String prefix, String namespaceUri) contains the following line:
getPrefixesInternal(namespaceUri).add(prefix); // line 108

Method getPrefixesInternal(String namespaceUri) in turn contains the following:
if (defaultNamespaceUri.equals(namespaceUri)) {
return Collections.singletonList(XMLConstants.DEFAULT_NS_ PREFIX); // line 128
}

Method Collections#singletonList returns an *** immutable *** list. Invoking add (in line 108) can only yield an UnsupportedOperationException.

So I am really stuck. Does someone has any hint? Thanks in advance,

Ivan

PS. I use Spring-WS version 1.5.7.
PPS. I attached the SOAP result.

[tareq]

Someone already raised a Jira issue for the same problem.

[ivan dal bosco]

Thanks very much Tareq. I reverted to version 1.5.6 and my trouble disappeared.