Nullpointer serialization second level cache
--------------------------------------------
Key: WICKET-1165
URL: https://issues.apache.org/jira/browse/WICKET-1165
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 1.3.0-rc1
Reporter: Eelco Hillenius
Assignee: Matej Knopp
Fix For: 1.3.0-rc2
A few times a week, we get this exception:
2007-11-19 07:29:52,914 ERROR org.apache.wicket.util.lang.Objects - Error
serializing object class ts4.web.wicket.page.workspace.NavigationPage
[object=[Page class = ts4.web.wicket.page.workspace.NavigationPage, id = 4,
version = 0]]
java.lang.NullPointerException
at java.util.LinkedList.writeObject(LinkedList.java:755)
at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at
org.apache.wicket.util.io.IObjectStreamFactory$1.writeObjectOverride(IObjectStreamFactory.java:66)
at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:298)
at
org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1097)
at
org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:200)
at
org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:709)
at
org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:337)
at org.apache.wicket.Session.requestDetached(Session.java:1391)
at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1016)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1263)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:489)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:319)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:169)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1045)
at
ts4.web.ThreadLocalCleanupFilter.doFilter(ThreadLocalCleanupFilter.java:25)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1045)
at
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1045)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:358)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:231)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:665)
at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:454)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:123)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:141)
at org.mortbay.jetty.Server.handle(Server.java:303)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:452)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:721)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:509)
at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:349)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:320)
at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)
No idea how that happens.
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