Shapefile renderer cascade onto StreamingRenderer triggers memory leaks
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                 Key: GEOT-1671
                 URL: http://jira.codehaus.org/browse/GEOT-1671
             Project: GeoTools
          Issue Type: Bug
          Components: ext shapefilerender
    Affects Versions: 2.4-RC1
            Reporter: Andrea Aime
             Fix For: 2.4-RC1, 2.5-M1


When cascading to StreamingRenderer a new MapContext is built, which attaches a 
new set of listeners to the feature sources. These get never cleared, resulting 
in a progressive memory leak (FeatureListenerManager keeps around the new 
mapcontext with all its style information as well as the feature source, if the 
style is big the out of memory happens relatively soon, if it's small it takes 
lots of time).

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