[ZEPPELIN-3457] Matplotlib hist() function with log scale does not work in Zeppelin

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.7.3
• Component/s: pySpark, python-interpreter
• Assignee: Unassigned
• Reporter: Alberto Cordioli
• Created: 14/May/18 06:07
• Updated: 14/May/18 06:07

Description

In Zeppelin, Python interpreter gives error when I try to plot some simple data using matplotlib hist() function using log scale.
For example, the following code:

%spark.pyspark
import matplotlib.pyplot as plt
plt.hist(x=[1,1,2,5,6,7,8], log=True)

raises the following error:

Traceback (most recent call last):
  File "/tmp/zeppelin_pyspark-6974052710629836805.py", line 367, in <module>
    raise Exception(traceback.format_exc())
Exception: Traceback (most recent call last):
  File "/tmp/zeppelin_pyspark-6974052710629836805.py", line 360, in <module>
    exec(code, _zcUserQueryNameSpace)
  File "<stdin>", line 2, in <module>
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/pyplot.py", line 3081, in hist
    stacked=stacked, data=data, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/__init__.py", line 1898, in inner
    return func(ax, *args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_axes.py", line 6279, in hist
    color=c, **{bottom_kwarg: bottom})
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/__init__.py", line 1898, in inner
    return func(ax, *args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_axes.py", line 2019, in bar
    self.set_yscale('log', nonposy='clip')
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_base.py", line 3238, in set_yscale
    ax.yaxis._set_scale(value, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 710, in _set_scale
    self._scale.set_default_locators_and_formatters(self)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/scale.py", line 249, in set_default_locators_and_formatters
    axis.set_major_locator(LogLocator(self.base))
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 1543, in set_major_locator
    self.stale = True
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 279, in stale
    self.stale_callback(self, val)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 76, in _stale_axes_callback
    self.axes.stale = val
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 279, in stale
    self.stale_callback(self, val)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/figure.py", line 56, in _stale_figure_callback
    self.figure.stale = val
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 279, in stale
    self.stale_callback(self, val)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/pyplot.py", line 576, in _auto_draw_if_interactive
    fig.canvas.draw_idle()
  File "/opt/zeppelin-0.7.3-bin-all/interpreter/lib/python/backend_zinline.py", line 136, in draw_idle
    self.draw(*args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 464, in draw
    self.figure.draw(self.renderer)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/figure.py", line 1144, in draw
    renderer, self, dsu, self.suppressComposite)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_base.py", line 2426, in draw
    mimage._draw_list_compositing_images(renderer, self, dsu)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 1136, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 969, in _update_ticks
    tick_tups = [t for t in self.iter_ticks()]
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 912, in iter_ticks
    majorLocs = self.major.locator()
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/ticker.py", line 1930, in __call__
    return self.tick_values(vmin, vmax)
  File "/home/zeppelin/anaconda2/lib/python2.7/site-packages/matplotlib/ticker.py", line 1956, in tick_values
    "Data has no positive values, and therefore can not be "
ValueError: Data has no positive values, and therefore can not be log-scaled.

I get the very same error even if I use python interpreter, instead of pyspark.
If I remove log scale everything works fine.
I did not find any open issue related to this problem, except the following link that might be related:
https://stackoverflow.com/questions/48440882/python-plotting-time-series-data-in-zeppelin-causes-valueerror-alternate-times