Connecting (producer) LR EE 6.1 via WSRP to (consumer) EE 6.0 SP1 causes NPE on producer side

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.1.10 EE GA1, 6.0.X EE
• Fix Version/s: None
• Component/s: Deployment, Deployment > WSRP
• Labels: None
• Fix Priority: 4
• Similar Issues: Show 4 results ; ;

  LPS-24889	Connecting (producer) LR 6.0.6 CE via WSRP to (consumer) 6.1GA causes NPE on consumer side
  LPS-24846	WSRP between two LR 6.1ga1 causes "Unable to find <liferay-wsrp-portlet>" Exception
  LPS-5847	WSRP control panel shows no consumers on producer problems
  LPS-35230	After adding a Producer the user is unable to add a Consumer that uses the Producer that was created.

This is similar to LPS-24889 but in the reverse direction.

Steps to reproduce:

1. Set up a WSRP producer for the Currency Converter portlet in Liferay 6.1 EE GA1
2. Set up a WSRP consumer in Liferay 6.0 EE SP1 and add the portlet to the home page
3. A NullPointerException is reported in the producer when viewing the page

[V2MarkupServiceImpl:104] java.lang.NullPointerException
java.lang.NullPointerException
        at com.liferay.wsrp.bind.V2MarkupServiceImpl.addHeaders(V2MarkupServiceImpl.java:219)
        at com.liferay.wsrp.bind.V2MarkupServiceImpl.doGetMarkup(V2MarkupServiceImpl.java:236)
        at com.liferay.wsrp.bind.V2MarkupServiceImpl.getMarkup(V2MarkupServiceImpl.java:96)

Note: If the consumer is set up in either EE 6.0 SP2 or EE 6.1 GA1 then the WSRP portlet works

The following code change to the wsrp-portlet source (wsrp-portlet-src-6.1.10.1-ee-ga1-20120308105411784.zip)
makes the producer accept old-style WSRP requests from the consumer:

In ExtensionUtil, change the getNameAttribute() method to:

	public static String getNameAttribute(MessageElement messageElement) {
		Iterator<String> itr = messageElement.getNamespacePrefixes();

		String namespacePrefix = itr.next();

		String namespaceURI = messageElement.getNamespaceURI(namespacePrefix);

		String name = messageElement.getAttributeNS(namespaceURI, NAME);
		
		// LPS-26280: Backwards-compatibility with EE 6.0 SP1
		if (name == null) {
			return messageElement.getName();
		}
		return name;
	}