Github user njayaram2 commented on the issue:
https://github.com/apache/madlib/pull/241
Another issue I found but forgot to mention in the review:
The `__id__` column has double values instead of integers. For instance, I
found values such as `0.20000000000000000000` for that column in the output
table.
This issue also happens only when the module is used without specifying a
value for the `buffer_size` param.---
