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java.lang.ClassNotFoundException: org.apache.log4j.Logger	at com.sun.enterprise.loader.EJBClassLoader.findClassData(EJBClassLoader.java:715)	at com.sun.enterprise.loader.EJBClassLoader.findClass(EJBClassLoader.java:628)	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)	at com.acs.util.APMServiceLocator.(APMServiceLocator.java:30)	at com.acs.util.APMDataFactory.(APMDataFactory.java:65)	at com.acs.login.CacheManager.loadData(CacheManager.java:48)	at com.acs.login.CacheManager.init(CacheManager.java:42)	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1194)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1023)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4917)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:5324)	at com.sun.enterprise.web.WebModule.start(WebModule.java:353)	at com.sun.enterprise.web.LifecycleStarter.doRun(LifecycleStarter.java:58)	at com.sun.appserv.management.util.misc.RunnableBase.runSync(RunnableBase.java:304)	at com.sun.appserv.management.util.misc.RunnableBase.run(RunnableBase.java:341)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)	at java.util.concurrent.FutureTask.run(FutureTask.java:138)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:619)