Divide by zero in Parsimonious

[joepio]

trends_1            | /opt/trends/src/weighwords/weighwords/parsimonious.py:206: RuntimeWarning: divide by zero encountered in log
trends_1            |   tf = np.log(tf)
trends_1            | /opt/trends/src/weighwords/weighwords/parsimonious.py:219: RuntimeWarning: invalid value encountered in subtract
trends_1            |   diff = new_p_term - p_term
trends_1            | /opt/trends/src/weighwords/weighwords/specific_term_estimators.py:58: RuntimeWarning: divide by zero encountered in log
trends_1            |   for tf in document_term_frequencies
trends_1            | /opt/trends/src/weighwords/weighwords/logsum.py:28: RuntimeWarning: invalid value encountered in subtract
trends_1            |   out = np.log(np.nansum(np.exp(x - vmax), axis=0))

[jurrian]

Seems to be related to a lack of RAM. Due to earlier problems docker has been max'd to 3Gb of RAM which is reached almost directly. The mentioned divide by zero is a warning which should not impact the process, and probably occurs because we use an old version of the weighwords package.