The Plot plugin cant handle a jmx step title with numeric numbering in it:

ie: "9.8 KML Query"

2018-05-25T11:15:06,036 | ERROR | Plot                                     | Exception converting to number
java.lang.NumberFormatException: For input string: "9.8 KML Query"

2018-05-25T11:15:06,037 | ERROR | Plot                                     | Exception converting to number
java.lang.NumberFormatException: multiple points
        at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1914) ~[?:1.8.0_151]
        at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110) ~[?:1.8.0_151]
        at java.lang.Double.parseDouble(Double.java:538) ~[?:1.8.0_151]
        at hudson.plugins.plot.Plot.generatePlot(Plot.java:759) [plot.jar:2.0.5]
        at hudson.plugins.plot.Plot.plotGraph(Plot.java:641) [plot.jar:2.0.5]
        at hudson.plugins.plot.PlotReport.doGetPlot(PlotReport.java:100) [plot.jar:2.0.5]