Activation related stack traces after upgrading to 4.2.15

[Greg Logan]

Hi all,

We are seeing null pointer exceptions[1] on requests after upgrading from
4.2.9 to 4.2.15.  The requests look like this (these are testing instances,
passwords are public, feel free to copy and paste these commands):

curl -vvv 'https://stable.opencast.org/api/series/' \
  -u admin:opencast \
  -F 'metadata=[{"label":"Opencast Series
Dublincore","flavor":"dublincore\/series","fields":[{"id":"title","value":"Test"}]}]'
\
  -F
'acl=[{"allow":true,"action":"write","role":"ROLE_ADMIN"},{"allow":true,"action":"read","role":"ROLE_ADMIN"}]'

A corrected request adds mimetypes to the acl and metadata fields:

curl -vvv 'https://stable.opencast.org/api/series/' \
  -u admin:opencast \
  -F 'metadata=[{"label":"Opencast Series
Dublincore","flavor":"dublincore\/series","fields":[{"id":"title","value":"Test"}]}];
type=application/json' \
  -F
'acl=[{"allow":true,"action":"write","role":"ROLE_ADMIN"},{"allow":true,"action":"read","role":"ROLE_ADMIN"}];
type=application/json'

Looking through the Karaf jira,
https://issues.apache.org/jira/browse/KARAF-6703 caught one of our
developer's eye, notably the comment with the same stack trace linking to
https://issues.apache.org/jira/browse/CXF-8380.  Looking at the jars in our
assemblies, it looks like we have CXF 3.4.3, but this behaviour is supposed
to be resolved by 3.4.2.  Am I confused and this is still a known issue, or
am I just unfamiliar with the inner workings of Karaf and CXF?

Thanks,
G

1: <h3>Caused by:</h3><pre>java.lang.NullPointerException: mimeType
        at
java.datatransfer/java.awt.datatransfer.DataFlavor.&lt;init&gt;(DataFlavor.java:427)
        at
javax.activation.ActivationDataFlavor.&lt;init&gt;(ActivationDataFlavor.java:113)
        at javax.activation.DataHandler.&lt;init&gt;(DataHandler.java:41)
        at
org.apache.cxf.attachment.AttachmentUtil.createAttachment(AttachmentUtil.java:420)
        at
org.apache.cxf.jaxrs.ext.MessageContextImpl.createAttachments(MessageContextImpl.java:291)
        at
org.apache.cxf.jaxrs.ext.MessageContextImpl.get(MessageContextImpl.java:79)
        at
org.apache.cxf.jaxrs.utils.multipart.AttachmentUtils.getMultipartBody(AttachmentUtils.java:84)
        at
org.apache.cxf.jaxrs.utils.JAXRSUtils.processFormParam(JAXRSUtils.java:1044)
        at
org.apache.cxf.jaxrs.utils.JAXRSUtils.createHttpParameterValue(JAXRSUtils.java:967)
        at
org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameter(JAXRSUtils.java:927)
        at
org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameters(JAXRSUtils.java:842)
...