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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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java.lang.NoClassDefFoundError: oracle/as/scheduler/MetadataServiceException	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(	at oracle.xdo.servlet.scheduler.SchedulingServiceFactory.init(	at oracle.xdo.servlet.scheduler.SchedulingServiceFactory.getSchedulingService(	at oracle.xdo.servlet.ui.scheduler.SchedulerServlet.getSchedulingService(