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java.lang.NullPointerException: 	at java.util.jar.JarVerifier.mapSignersToCodeSource(Unknown Source)	at java.util.jar.JarVerifier.mapSignersToCodeSources(Unknown Source)	at java.util.jar.JarVerifier.getCodeSources(Unknown Source)	at java.util.jar.JarFile.getCodeSources(Unknown Source)	at java.util.jar.JavaUtilJarAccessImpl.getCodeSources(Unknown Source)	at com.sun.deploy.cache.DeployCacheJarAccessImpl.getCodeSources(Unknown Source)	at com.sun.javaws.security.SigningInfo.getCommonCodeSignersForJar(Unknown Source)	at com.sun.javaws.security.SigningInfo.check(Unknown Source)	at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(Unknown Source)	at com.sun.javaws.LaunchDownload.checkSignedResources(Unknown Source)	at com.sun.javaws.Launcher.prepareResources(Unknown Source)	at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)	at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)	at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)	at com.sun.javaws.Launcher.launch(Unknown Source)	at com.sun.javaws.Main.launchApp(Unknown Source)	at com.sun.javaws.Main.continueInSecureThread(Unknown Source)	at com.sun.javaws.Main$1.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)