Github user alfonsonishikawa commented on the issue:
https://github.com/apache/gora/pull/94
I tried locally too and can't reproduce the error.
I found this about your error:
https://issues.apache.org/jira/browse/CASSANDRA-8220
Seems related to OSX and JDK8.
https://stackoverflow.com/questions/32508530/cassandra-on-mac-stopping-cassandra-shows-error
I guess it can be committed safely :) ---

