症状

An error message NoClassDefFoundError appears when using the Chart macro.

The following error may appear when viewing certain pages where the Chart Macro is used:

Caused by: java.lang.NoClassDefFoundError
at org.jfree.chart.ChartFactory.createAreaChart(ChartFactory.java:874)
at com.atlassian.confluence.extra.chart.ChartMacro.getChart(ChartMacro.java:217)
at com.atlassian.confluence.extra.chart.ChartMacro.execute(ChartMacro.java:102)

原因

This is indicative of an out-of-date version of the Chart macro.

ソリューション

Make sure you have the latest version and have removed any old versions or dependencies.