Github user cestella commented on a diff in the pull request: https://github.com/apache/incubator-metron/pull/483#discussion_r106898305 --- Diff: metron-platform/metron-parsers/src/main/java/org/apache/metron/parsers/bolt/ParserBolt.java --- @@ -132,6 +133,9 @@ public void execute(Tuple tuple) { Optional<List<JSONObject>> messages = parser.parseOptional(originalMessage); for (JSONObject message : messages.orElse(Collections.emptyList())) { message.put(Constants.SENSOR_TYPE, getSensorType()); + if(!message.containsKey(Constants.GUID)) { --- End diff -- You should probably do this after the field transformations, so that if people provide their own GUID, they don't have one imposed on them.
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