Snapshot from WSDL:
<complexType name="getHello"> <sequence> <element name="String_1" type="string" nillable="true"/> </sequence> </complexType>
Yes, that would be a bug.
Could you please create a JIRA issue and attach a sample deployment that allows us to reproduce what you are seeing. Idealy, the sample deployment is a webapp packaged as a war that will show the issue when we click on a link. The war should also contain the sources.