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java.lang.ExceptionInInitializerError at org.apache.catalina.core.StandardContext.start(StandardContext.java:4963) at com.sun.webserver.connector.nsapi.WebModule.start(WebModule.java:240) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1224) at org.apache.catalina.core.StandardHost.start(StandardHost.java:924) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1224) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:520) at org.apache.catalina.startup.Embedded.start(Embedded.java:917) at com.sun.enterprise.web.PwcWebContainer.onStartup(PwcWebContainer.java:70) at com.sun.webserver.connector.nsapi.WebContainer.start(WebContainer.java:497) at com.sun.webserver.init.J2EERunner.confPostInit(J2EERunner.java:304)Caused by: java.lang.NullPointerException at org.apache.catalina.util.ExtensionValidator.<clinit>(ExtensionValidator.java:125) ... 10 more