java.lang.NullPointerException

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  • Stack trace

    • java.lang.NullPointerException: null at com.xpn.xwiki.objects.classes.DBListClass.displayView(DBListClass.java:565)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:2768)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:2729)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:2678)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.api.Document.display(Document.java:1247)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at sun.reflect.GeneratedMethodAccessor230.invoke(Unknown Source)[na:na] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[na:1.6.0_29] at java.lang.reflect.Method.invoke(Method.java:597)[na:1.6.0_29] at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)[velocity-1.7.jar:1.7] at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:151)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)[velocity-1.7.jar:1.7] at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)[velocity-1.7.jar:1.7] at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:186)[xwiki-commons-velocity-3.3-20111116.083746-30.jar:na] at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:152)[xwiki-commons-velocity-3.3-20111116.083746-30.jar:na] at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:117)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1813)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:154)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:239)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:116)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)[struts-1.2.9.jar:1.2.9] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)[struts-1.2.9.jar:1.2.9] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)[struts-1.2.9.jar:1.2.9] at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)[struts-1.2.9.jar:1.2.9] at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)[servlet-api-2.5.jar:2.5] at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)[servlet-api-2.5.jar:2.5] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1352)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:128)[xwiki-platform-legacy-oldcore-3.3-20111116.182336-161.jar:na] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144)[xwiki-platform-wysiwyg-server-3.3-SNAPSHOT.jar:na] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68)[xwiki-platform-webdav-server-3.3-20111116.182858-160.jar:na] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:217)[xwiki-platform-container-servlet-3.3-20111116.180707-194.jar:na] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)[xwiki-platform-container-servlet-3.3-20111116.180707-194.jar:na] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)[jetty-security-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)[jetty-servlet-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.Server.handle(Server.java:346)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:601)[jetty-http-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214)[jetty-http-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)[jetty-server-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535)[jetty-io-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)[jetty-io-7.4.5.v20110725.jar:7.4.5.v20110725] at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)[jetty-util-7.4.5.v20110725.jar:7.4.5.v20110725] at java.lang.Thread.run(Thread.java:662)[na:1.6.0_29]

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