Carrot2

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.4.0
• Component/s: Framework Core
• Labels:

  None

Execute ClusteringDataFromDocumentSources. With the simple controller it throws:

Exception in thread "main" org.carrot2.util.attribute.AttributeBindingException: No value for required attribute: documents (org.carrot2.clustering.lingo.LingoClusteringAlgorithm#documents)
	at org.carrot2.util.attribute.AttributeBinder$AttributeBinderActionBind.performAction(AttributeBinder.java:543)
	at org.carrot2.util.attribute.AttributeBinder.bind(AttributeBinder.java:309)
	at org.carrot2.util.attribute.AttributeBinder.bind(AttributeBinder.java:214)
	at org.carrot2.util.attribute.AttributeBinder.bind(AttributeBinder.java:159)
	at org.carrot2.util.attribute.AttributeBinder.bind(AttributeBinder.java:137)
	at org.carrot2.util.attribute.AttributeBinder.bind(AttributeBinder.java:124)
	at org.carrot2.core.SimpleProcessingComponentManager.prepare(SimpleProcessingComponentManager.java:59)
	at org.carrot2.core.Controller.process(Controller.java:273)
	at org.carrot2.core.Controller.process(Controller.java:180)
	at org.carrot2.examples.clustering.ClusteringDataFromDocumentSources.main(ClusteringDataFromDocumentSources.java:62)

This is wrong because documents are set as a result of Bing's invocation. Tracing the controller logic it makes me wonder what this piece of code does:

Controller.java:

                // Create a component for processing. Depending on the manager, a new
                // component may be instantiated, a pooled one may be returned or we may
                // get some wrapper that performs some extra actions.
                components[i] = componentManager.prepare(
                    configurations[i].componentClass, configurations[i].componentId,
                    inputAttributes, resultAttributes);

but then, this in SimpleProcessingComponentManager is:

inputAttributes does not contain documents at all and resultAttributes is not used to initialize the component; hence, you get an exception during bind() because documents are required at @Processing step.

• Assignee:

  Stanisław Osiński

  Reporter:

  Dawid Weiss

• Created:

  11/Jun/10 12:11 PM

  Updated:

  11/Jun/10 2:32 PM

  Resolved:

  11/Jun/10 2:32 PM