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NumpyPlotFileLogger savefig with IndexError
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Description

During training, the thread handling saving of figures in the NumpyPlotFileLogger (show_value method, to be precise), raises an IndexError. The error is non-critical and happens in seemingly random intervals. Epochs after the error usually work fine again. Traceback:

Unhandled exception in thread started by <bound method Figure.savefig of <matplotlib.figure.Figure object at 0x7fe92a3b2e48>>
Traceback (most recent call last):
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/figure.py", line 1573, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/backend_bases.py", line 2252, in print_figure
    **kwargs)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py", line 545, in print_png
    FigureCanvasAgg.draw(self)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py", line 464, in draw
    self.figure.draw(self.renderer)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/figure.py", line 1144, in draw
    renderer, self, dsu, self.suppressComposite)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axes/_base.py", line 2426, in draw
    mimage._draw_list_compositing_images(renderer, self, dsu)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axis.py", line 1136, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axis.py", line 969, in _update_ticks
    tick_tups = [t for t in self.iter_ticks()]
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axis.py", line 969, in <listcomp>
    tick_tups = [t for t in self.iter_ticks()]
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axis.py", line 913, in iter_ticks
    majorTicks = self.get_major_ticks(len(majorLocs))
  File "/home/jens/anaconda3/lib/python3.6/site-packages/matplotlib/axis.py", line 1330, in get_major_ticks
    tick = self.majorTicks[i]
IndexError: list index out of range

First step will be to find out which figure causes the error.

Event Timeline

petersej triaged this task as Normal priority.Apr 6 2018, 1:40 PM
petersej created this task.