Classloading problems when taglibs are used.
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                 Key: SLING-1631
                 URL: https://issues.apache.org/jira/browse/SLING-1631
             Project: Sling
          Issue Type: Bug
          Components: Scripting
    Affects Versions: Scripting JSP 2.0.8
            Reporter: Carsten Ziegeler
            Assignee: Carsten Ziegeler
             Fix For: Scripting JSP 2.0.10


When taglibs are used together with jsp scripting there are several problems:
1. The taglib cache does not detect changes to taglibs (contained in bundles) 
like the general classloading mechanism through the dynamic classloader - this 
can result in inconsistencies and classloading problems.
2. The last modified check for taglibs does not work as expected. As soon as 
tags are used, they are considered as changed which results in recompilation of 
the jsp and of the tag where the second invalidates the classloader of the jsp. 
This classloader is later on used and then a classloading exception is thrown

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