2019-07-02 15:18:05.279 [WARN ] [thome.ui.internal.chart.ChartServlet] - Chart generation failed: null

2019-07-02 15:18:08.570 [WARN ] [org.eclipse.jetty.server.HttpChannel] - /rrdchart.png

java.lang.NoClassDefFoundError: Could not initialize class org.rrd4j.graph.RrdGraphConstants

	at org.rrd4j.graph.RrdGraphDef.<init>(RrdGraphDef.java:80) ~[?:?]

	at org.openhab.persistence.rrd4j.internal.charts.RRD4jChartServlet.createChart(RRD4jChartServlet.java:257) ~[?:?]

	at org.openhab.persistence.rrd4j.internal.charts.RRD4jChartServlet.service(RRD4jChartServlet.java:157) ~[?:?]

	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865) ~[?:?]

	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535) ~[?:?]

	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71) ~[?:?]

	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) ~[?:?]

	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1317) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:293) ~[?:?]

	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) ~[?:?]

	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1219) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80) ~[?:?]

	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.Server.handle(Server.java:531) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352) [84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) [84:org.eclipse.jetty.server:9.4.11.v20180605]

	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:291) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.io.ssl.SslConnection$3.succeeded(SslConnection.java:151) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) [75:org.eclipse.jetty.io:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680) [87:org.eclipse.jetty.util:9.4.11.v20180605]

	at java.lang.Thread.run(Thread.java:748) [?:?]

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