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org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ ]]
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org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
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org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
java.lang.IllegalArgumentException: The main resource set specified [D:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\workspace\JSP_Project\WebContent] is not valid	at org.apache.catalina.webresources.StandardRoot.createMainResourceSet(StandardRoot.java:723)	at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:684)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)	at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4928)	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5058)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)