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https://issues.apache.org/jira/browse/CXF-6997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Moroski resolved CXF-6997.
-------------------------------
    Resolution: Not A Bug

This is user error.  MediaType isn't intended to handle multiple media types in 
a single value.  Our calling code shouldn't be appending multiple accept 
headers together into a single value.

> Accept header doesn't correctly support multiple media ranges
> -------------------------------------------------------------
>
>                 Key: CXF-6997
>                 URL: https://issues.apache.org/jira/browse/CXF-6997
>             Project: CXF
>          Issue Type: Bug
>    Affects Versions: 3.1.6
>            Reporter: Jeff Moroski
>
> An Accept value of 
> {{application/*+xml,application/*+xml;version=25.0,application/*+xml;version=1.5}}
>  is valid according to [Section 5.3.2 of RFC 
> 7231|https://tools.ietf.org/html/rfc7231#section-5.3.2], but when a media 
> range and no corresponding accept params exists anywhere but the end of the 
> value, the MediaTypeHeaderProvider fails to process the value correctly:
> {noformat}
> Server stack trace: java.lang.IllegalArgumentException: Invalid media type 
> string: 
> application/*+xml,application/*+xml;version=25.0,application/*+xml;version=1.5
> at 
> org.apache.cxf.jaxrs.impl.MediaTypeHeaderProvider.internalValueOf(MediaTypeHeaderProvider.java:90)
> at 
> org.apache.cxf.jaxrs.impl.MediaTypeHeaderProvider.valueOf(MediaTypeHeaderProvider.java:65)
> at 
> org.apache.cxf.jaxrs.impl.MediaTypeHeaderProvider.fromString(MediaTypeHeaderProvider.java:55)
> at 
> org.apache.cxf.jaxrs.impl.MediaTypeHeaderProvider.fromString(MediaTypeHeaderProvider.java:42)
> at javax.ws.rs.core.MediaType.valueOf(MediaType.java:179)
> {noformat}



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