Hi im wondering why this happens? Im using Guice and have a these in my page:
@Inject private WallBoardDataProvider wallBoardDataProvider; @Inject private CoreService coreService; @Inject private CoreDaoService coreDaoService; @Inject private LicenseProvider licenseProvider; @Inject private Injector injector; 2011-01-20 10:16:44,833 ERROR [org.apache.wicket.util.lang.WicketObjects] - Error serializing object class com.netdesign.wallboard.page.DriverSetupPage [object=[Page class = com.netdesign.wallboard.page.DriverSetupPage, id = 3, render count = 2]] java.lang.NullPointerException at $Proxy39.equals(Unknown Source) at java.util.Vector.indexOf(Vector.java:361) at java.util.Vector.contains(Vector.java:320) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:343) at org.apache.wicket.util.io.SerializableChecker.checkFields(SerializableChecker.java:641) at org.apache.wicket.util.io.SerializableChecker.internalCheck(SerializableChecker.java:564) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:351) at org.apache.wicket.util.io.SerializableChecker.checkFields(SerializableChecker.java:641) at org.apache.wicket.util.io.SerializableChecker.internalCheck(SerializableChecker.java:564) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:351) at org.apache.wicket.util.io.SerializableChecker.checkFields(SerializableChecker.java:641) at org.apache.wicket.util.io.SerializableChecker.internalCheck(SerializableChecker.java:564) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:351) at org.apache.wicket.util.io.SerializableChecker.internalCheck(SerializableChecker.java:418) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:351) at org.apache.wicket.util.io.SerializableChecker.checkFields(SerializableChecker.java:641) at org.apache.wicket.util.io.SerializableChecker.internalCheck(SerializableChecker.java:564) at org.apache.wicket.util.io.SerializableChecker.check(SerializableChecker.java:351) at org.apache.wicket.util.io.SerializableChecker.writeObjectOverride(SerializableChecker.java:710) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:322) at org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:129) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:322) at org.apache.wicket.util.lang.WicketObjects.objectToByteArray(WicketObjects.java:477) at org.apache.wicket.pageStore.DefaultPageStore.serializePage(DefaultPageStore.java:364) at org.apache.wicket.pageStore.DefaultPageStore.storePage(DefaultPageStore.java:153) at org.apache.wicket.page.PersistentPageManager$PersitentRequestAdapter.storeTouchedPages(PersistentPageManager.java:335) at org.apache.wicket.page.RequestAdapter.commitRequest(RequestAdapter.java:185) at org.apache.wicket.page.AbstractPageManager.commitRequest(AbstractPageManager.java:98) at org.apache.wicket.page.PageManagerDecorator.commitRequest(PageManagerDecorator.java:68) at org.apache.wicket.page.PageAccessSynchronizer$1.commitRequest(PageAccessSynchronizer.java:204) at org.apache.wicket.Application$3.onDetach(Application.java:1233) at org.apache.wicket.request.cycle.RequestCycleListenerCollection$4.notify(RequestCycleListenerCollection.java:71) at org.apache.wicket.request.cycle.RequestCycleListenerCollection$4.notify(RequestCycleListenerCollection.java:67) at org.apache.wicket.util.listener.ListenerCollection.notify(ListenerCollection.java:78) at org.apache.wicket.request.cycle.RequestCycleListenerCollection.onDetach(RequestCycleListenerCollection.java:65) at org.apache.wicket.request.cycle.RequestCycle.detach(RequestCycle.java:502) at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:252) at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:131) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:184) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.wideplay.warp.persist.PersistenceFilter$3.run(PersistenceFilter.java:141) at com.wideplay.warp.persist.internal.Lifecycles.failEarlyAndLeaveNoOneBehind(Lifecycles.java:29) at com.wideplay.warp.persist.PersistenceFilter.doFilter(PersistenceFilter.java:155) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:943) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
