When i go to the statistics bar the page appears with no information and in the log is stored the following information:
2019.02.23 10:20:01 org.jivesoftware.openfire.container.PluginServlet - null
java.lang.NullPointerException: null
at org.jivesoftware.openfire.reporting.stats.RrdSqlBackend.read(RrdSqlBackend.java:151) ~[?:?]
at org.jrobin.core.RrdBackend.readString(RrdBackend.java:258) ~[?:?]
at org.jrobin.core.RrdPrimitive.readString(RrdPrimitive.java:107) ~[?:?]
at org.jrobin.core.RrdString.get(RrdString.java:53) ~[?:?]
at org.jrobin.core.Header.isJRobinHeader(Header.java:199) ~[?:?]
at org.jrobin.core.Header.validateHeader(Header.java:203) ~[?:?]
at org.jrobin.core.RrdDb.(RrdDb.java:233) ~[?:?]
at org.jrobin.core.RrdDb.(RrdDb.java:203) ~[?:?]
at org.jivesoftware.openfire.reporting.stats.StatsEngine$DefaultStatDefinition.fetchData(StatsEngine.java:495) ~[?:?]
at org.jivesoftware.openfire.reporting.stats.StatsEngine$DefaultStatDefinition.getData(StatsEngine.java:463) ~[?:?]
at org.jivesoftware.openfire.reporting.stats.DefaultStatsViewer.getData(DefaultStatsViewer.java:79) ~[?:?]
at org.jivesoftware.openfire.reporting.graph.GraphEngine.populateData(GraphEngine.java:191) ~[?:?]
at org.jivesoftware.openfire.reporting.graph.GraphEngine.generateChart(GraphEngine.java:133) ~[?:?]
at org.jivesoftware.openfire.reporting.graph.GraphEngine.generateGraph(GraphEngine.java:107) ~[?:?]
at org.jivesoftware.openfire.reporting.graph.GraphServlet.service(GraphServlet.java:125) ~[?:?]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[javax.servlet-api-3.1.0.jar:3.1.0]
at org.jivesoftware.openfire.container.PluginServlet.handleServlet(PluginServlet.java:417) ~[xmppserver-4.3.2.jar:4.3.2]
at org.jivesoftware.openfire.container.PluginServlet.service(PluginServlet.java:113) [xmppserver-4.3.2.jar:4.3.2]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet-api-3.1.0.jar:3.1.0]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1655) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:226) [xmppserver-4.3.2.jar:4.3.2]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:216) [xmppserver-4.3.2.jar:4.3.2]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at com.opensymphony.sitemesh.webapp.SiteMeshFilter.obtainContent(SiteMeshFilter.java:129) [sitemesh-2.4.2.jar:?]
at com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:77) [sitemesh-2.4.2.jar:?]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1634) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [jetty-security-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1340) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) [jetty-servlet-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1242) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.Server.handle(Server.java:503) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) [jetty-server-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:411) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:305) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:159) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) [jetty-io-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683) [jetty-util-9.4.12.v20180830.jar:9.4.12.v20180830]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
