runtime error: index out of range [0] with length 0\", stack='\"goroutine .. [running]
after some debugging I found where it was coming from: a big step in a series was causing a very small seasonLength, which was invalid for the HoltWintersAnalysis function. I also noted GraphiteWeb has this bug too, so I filed an issue there https://github.com/graphite-project/graphite-web/issues/2780 (I left more details about the problem there).
The fix I propose here is to force seasonLength to be at least 2, but we can see what GraphiteWeb's maintainers propose and match their decision later.
We found this panic in
HoltWintersAnalysisafter some debugging I found where it was coming from: a big step in a series was causing a very small
seasonLength, which was invalid for theHoltWintersAnalysisfunction. I also noted GraphiteWeb has this bug too, so I filed an issue there https://github.com/graphite-project/graphite-web/issues/2780 (I left more details about the problem there).The fix I propose here is to force
seasonLengthto be at least2, but we can see what GraphiteWeb's maintainers propose and match their decision later.