Adding principal connector to IdPv3

[Morris, Andi]

Hi all,
I know the docs say that principal connectors are deprecated, but should still work, however we're having an issue adding a principal connector to our IdP. Log snippet as below:

2017-03-29 12:50:40,011 - ERROR [net.shibboleth.utilities.java.support.service.AbstractReloadableService:181] - Service 'shibboleth.AttributeResolverService': Initial load failed
net.shibboleth.utilities.java.support.service.ServiceException: org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 24 in XML document from file [/opt/shibboleth-idp/conf/attribute-resolver.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 24; columnNumber: 79; The prefix "resolver" for element "resolver:PrincipalConnector" is not bound.
        at net.shibboleth.ext.spring.service.ReloadableSpringService.doReload(ReloadableSpringService.java:336)
Caused by: org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 24 in XML document from file [/opt/shibboleth-idp/conf/attribute-resolver.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 24; columnNumber: 79; The prefix "resolver" for element "resolver:PrincipalConnector" is not bound.
       at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:399)
Caused by: org.xml.sax.SAXParseException: The prefix "resolver" for element "resolver:PrincipalConnector" is not bound.
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)


The section of the attribute-resolver.xml the error is referring to is:

<AttributeResolver
        xmlns="urn:mace:shibboleth:2.0:resolver"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="urn:mace:shibboleth:2.0:resolver http://shibboleth.net/schema/idp/shibboleth-attribute-resolver.xsd">

<!-- Principal Connectors -->
<resolver:PrincipalConnector xsi:type="pc:Transient" xmlns="urn:mace:shibboleth:2.0:resolver:pc" id="saml2Persistent"
        nameIDFormat="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" />

<!-- Name Identifier related attributes -->
<resolver:AttributeEncoder xsi:type="SAML2StringNameID" xmlns="urn:mace:shibboleth:2.0:attribute:encoder"
            nameFormat="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" />

Is anyone able to point me in the right direction here? Even better if you could let me know the best way of adding a principal connector in version 3? I'm aware it's something in the saml-nameid.xml but my understanding of this side of Shibboleth is limited at best.

Cheers,
Andi
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