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    org.apache.http.config.Lookup class is in httpcore-4.3.jar not in httpclient-4.3.1.jar

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org/apache/commons/digester/RuleSet
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org/apache/commons/digester/RuleSet
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java.lang.NoClassDefFoundError: org/apache/commons/digester/RuleSet	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:242)	at weblogic.servlet.AsyncInitServlet.createDelegate(AsyncInitServlet.java:43)	at weblogic.servlet.AsyncInitServlet.initDelegate(AsyncInitServlet.java:92)	at weblogic.servlet.internal.WebAppServletContext$AsyncInitRequest.run(WebAppServletContext.java:1641)