Errors are observed using a REST client with the CA Performance Manager product.
An error stating "415 error (Unsupported Media Type)" is observed from a REST client when working with CA Performance Manager.
Due to incorrect REST Client configuration. If the correct content type is not specified in the REST client, when it issues the call to the target REST server it fails.
Set the Content-Type to application/xml
This is referenced in the Wiki Docs "Install the Client and Connect CA Performance Management". Alternatively search the existing Wiki documentation for a section titled "Install the Client and Connect CA Performance Management" and review steps 8 and 9 in that section.
Once set correctly the error will be resolved.
Please refer to the user documentation or Help section of the REST client in use.