Github user zentol commented on the pull request:
https://github.com/apache/flink/pull/1771#issuecomment-199298767
Just pushed the following changes:
* Fixed AT_LEAST_ONCE type
* CassandraInputFormat.close properly propagates exceptions in close()
* cassandra pom now uses guava.version attribute
* fixed NotSerializableException For CassandraAtLeastOnceTuple-/PojoSink
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