[GitHub] incubator-spark pull request: Added extra description on ValueErro...

[JoshRosen]

Github user JoshRosen commented on the pull request:

    https://github.com/apache/incubator-spark/pull/581#issuecomment-34799232
  
    You may be able to re-use the 
[`_extract_concise_traceback`](https://github.com/apache/incubator-spark/pull/311/files#diff-d6fe2792e44f6babc94aabfefc8b9bceR43)
 method in `rdd.py`.