eclipse - Java - Web Service Exception -


i new java , trying build web service consumes amazon aws sdk. getting trace below.
can point me in right direction on start resolving error. thanks!

    mar 10, 2014 9:53:30 pm org.apache.catalina.core.applicationcontext log     severe: standardwrapper.throwable     java.lang.noclassdeffounderror: com/amazonaws/auth/awscredentialsprovider     @ java.lang.class.getdeclaredconstructors0(native method)     @ java.lang.class.privategetdeclaredconstructors(class.java:2493)     @ java.lang.class.getconstructors(class.java:1517)     @ com.sun.jersey.server.impl.modelapi.annotation.introspectionmodeller.createresource(introspectionmodeller.java:110)     @ com.sun.jersey.server.impl.application.webapplicationimpl.getabstractresource(webapplicationimpl.java:669)     @ com.sun.jersey.server.impl.application.rootresourceurirules.<init>(rootresourceurirules.java:117)     @ com.sun.jersey.server.impl.application.webapplicationimpl._initiate(webapplicationimpl.java:1182)     @ com.sun.jersey.server.impl.application.webapplicationimpl.access$600(webapplicationimpl.java:161)     @ com.sun.jersey.server.impl.application.webapplicationimpl$12.f(webapplicationimpl.java:698)     @ com.sun.jersey.server.impl.application.webapplicationimpl$12.f(webapplicationimpl.java:695)     @ com.sun.jersey.spi.inject.errors.processwitherrors(errors.java:197)     @ com.sun.jersey.server.impl.application.webapplicationimpl.initiate(webapplicationimpl.java:695)     @ com.sun.jersey.server.impl.application.webapplicationimpl.initiate(webapplicationimpl.java:690)     @ com.sun.jersey.spi.container.servlet.servletcontainer.initiate(servletcontainer.java:438)     @ com.sun.jersey.spi.container.servlet.servletcontainer$internalwebcomponent.initiate(servletcontainer.java:287)     @ com.sun.jersey.spi.container.servlet.webcomponent.load(webcomponent.java:587)     @ com.sun.jersey.spi.container.servlet.webcomponent.init(webcomponent.java:213)     @ com.sun.jersey.spi.container.servlet.servletcontainer.init(servletcontainer.java:342)     @ com.sun.jersey.spi.container.servlet.servletcontainer.init(servletcontainer.java:516)     @ javax.servlet.genericservlet.init(genericservlet.java:160)     @ org.apache.catalina.core.standardwrapper.initservlet(standardwrapper.java:1266)     @ org.apache.catalina.core.standardwrapper.loadservlet(standardwrapper.java:1185)     @ org.apache.catalina.core.standardwrapper.load(standardwrapper.java:1080)     @ org.apache.catalina.core.standardcontext.loadonstartup(standardcontext.java:5027)     @ org.apache.catalina.core.standardcontext.startinternal(standardcontext.java:5314)     @ org.apache.catalina.util.lifecyclebase.start(lifecyclebase.java:150)     @ org.apache.catalina.core.containerbase.addchildinternal(containerbase.java:901)     @ org.apache.catalina.core.containerbase.addchild(containerbase.java:877)     @ org.apache.catalina.core.standardhost.addchild(standardhost.java:618)     @ org.apache.catalina.startup.hostconfig.deploydirectory(hostconfig.java:1100)     @ org.apache.catalina.startup.hostconfig$deploydirectory.run(hostconfig.java:1618)     @ java.util.concurrent.executors$runnableadapter.call(executors.java:471)     @ java.util.concurrent.futuretask.run(futuretask.java:262)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1145)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:615)     @ java.lang.thread.run(thread.java:744) caused by: java.lang.classnotfoundexception: com.amazonaws.auth.awscredentialsprovider     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1714)     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1559)     ... 36 more 


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