Caused by: javax.xml.stream.XMLStreamException: Underlying stream encoding UTF8 and input paramter for writeStartDocument() method UTF-8 do not match.

Caused by: javax.xml.stream.XMLStreamException: Underlying stream encoding UTF8 and input paramter for writeStartDocument() method UTF-8 do not match.
at com.sun.xml.stream.writers.XMLStreamWriterImpl.writeStartDocument(XMLStreamWriterImpl.java:1187)
at org.apache.axiom.om.impl.llom.OMDocumentImpl.internalSerialize(OMDocumentImpl.java:397)
at org.apache.axiom.om.impl.llom.OMDocumentImpl.internalSerialize(OMDocumentImpl.java:324)
at org.apache.abdera.parser.stax.FOMDocument.writeTo(FOMDocument.java:193)
... 32 more


SOLUTION to add the exclusion to the dependency.

<exclusions>
<exclusion>
<groupId>com.sun.xml.stream</groupId>
<artifactId>sjsxp</artifactId>
</exclusion>
</exclusions>

SAXParseException: Content is not allowed in prolog.

[org.xml.sax.SAXParseException: Content is not allowed in prolog.]
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:315)
at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.createUnmarshalException(UnmarshallerImpl.java:510)
at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:215)
at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:190)
at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:241)
at org.exoplatform.services.wsrp2.utils.StandardPayload.getUnmarshalledObject(StandardPayload.java:95)
at org.exoplatform.services.wsrp2.utils.StandardClasses.getUnmarshalledObject(StandardClasses.java:71)
at org.exoplatform.services.wsrp2.utils.JAXBEventTransformer.getUnmarshalledObject(JAXBEventTransformer.java:254)
at org.exoplatform.services.wsrp2.utils.JAXBEventTransformer.getEventsUnmarshal(JAXBEventTransformer.java:132)
at org.exoplatform.services.wsrp2.consumer.impl.WSRPConsumerPlugin.processAction(WSRPConsumerPlugin.java:745)


Where not a consistent xml to unmarshal.
Первый параметр должен быть репрезентацией валидного хмл.

JAXBElement

unmarshal(Node node, Class declaredType)

JAXBElement stdElement = unmarshaller.unmarshal(messageElement,classT);