Github user vesense commented on a diff in the pull request: https://github.com/apache/storm/pull/1801#discussion_r89727286 --- Diff: external/storm-cassandra/src/main/java/org/apache/storm/cassandra/bolt/BaseCassandraBolt.java --- @@ -105,17 +109,43 @@ public BaseCassandraBolt withResultHandler(ExecutionResultHandler resultHandler) return this; } + /** + * Configures this bolt with the given {@code fields} as outputfields with stream id as {@link Utils#DEFAULT_STREAM_ID} + * + * @param fields outputfields + */ public BaseCassandraBolt withOutputFields(Fields fields) { + Preconditions.checkNotNull("fields should not be null."); --- End diff -- Missing args, to -> `Preconditions.checkNotNull(fields, "fields should not be null.");`
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