In both collect.cgi/bulk.cgi discrete data set processing the graph server attempts to create a single point on a continuous graph to represent the test. This single point is the median of all test data points after the max data point has been eliminated. Given a data set of all the same value ( (1,2), (2,2), (3,2), etc ) the graph server is unable to create a point for the continuous graph since it is unable to find a max value to be ignored. Given this type of data set the graph server should be able to figure out that no points should be ignored. Yay for edge cases!

This is a bug that has become invalid due to the new graph server front end. See it in action here: http://graphs-stage.mozilla.org/g2/ http://graphs.mozilla.org/g2/ And for those interested in the code: http://hg.mozilla.org/index.cgi/graphs/ We are actively working to make this the only front end and deprecate the old. See bug 429226. If the problem persists or this bug is still active please re-open or re-file.