java.lang.SecurityException: sealing violation: package com.sun.media.imageioimpl.plugins.jpeg is sealed

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java.lang.SecurityException: sealing violation: package com.sun.media.imageioimpl.plugins.jpeg is sealed
at java.net.URLClassLoader.getAndVerifyPackage(URLClassLoader.java:399)
at java.net.URLClassLoader.definePackageInternal(URLClassLoader.java:419)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:451)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:510)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:441)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:370)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(IIORegistry.java:210)
at javax.imageio.spi.IIORegistry.(IIORegistry.java:138)
at javax.imageio.spi.IIORegistry.getDefaultInstance(IIORegistry.java:159)
at javax.imageio.ImageIO.(ImageIO.java:66)
at com.comp.core.model.artifactThumbnails.ArtifactThumbnailRepository.generateThumbnail(ArtifactThumbnailRepository.java:63)
at com.comp.core.model.artifactThumbnails.BigTableArtifactThumbnailRepository.createThumbnail(BigTableArtifactThumbnailRepository.java:71)
at com.comp.web.routes.vertex.VertexThumbnail.handle(VertexThumbnail.java:90)
at com.comp.miniweb.HandlerChain.next(HandlerChain.java:18)
at com.comp.web.privilegeFilters.PrivilegeFilter.handle(PrivilegeFilter.java:35)
at com.comp.miniweb.HandlerChain.next(HandlerChain.java:18)
at com.comp.miniweb.handlers.CSRFHandler.handle(CSRFHandler.java:66)
at com.comp.miniweb.HandlerChain.next(HandlerChain.java:18)
at com.comp.web.AuthenticationHandler.handle(AuthenticationHandler.java:17)
at com.comp.miniweb.HandlerChain.next(HandlerChain.java:18)
at com.comp.miniweb.Router.dispatch(Router.java:93)
at com.comp.miniweb.Router.routeWithExceptionHandling(Router.java:87)
at com.comp.miniweb.Router.route(Router.java:44)
at com.comp.miniweb.App.handle(App.java:128)
at com.comp.web.WebApp.handle(WebApp.java:71)
at com.comp.web.Router.service(Router.java:186)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:800)
at com.comp.web.RequestDebugFilter.doFilter(RequestDebugFilter.java:33)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:224)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:497)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:245)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at java.lang.Thread.run(Thread.java:745)

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