Log error trace as well as error message in GoraRecordWriter

Right now I am logging a rather annoying error when attempting to flush Super Columns to Cassandra 2.0.7 which reads as follows

2014-09-26 20:43:15,847 WARN mapreduce.GoraRecordWriter - Exception at GoraRecordWriter.class while closing datastore.InvalidRequestException(why:supercolumn parameter is not optional for super CF sc)

Yes, this is useful, however it would be better (for debugging purposes) if I could catch an entire stack trace as well within the log output.

Patch coming up for GoraRecordWriter which does just this.