simingweng commented on issue #3103: NullPointerException happened in KafkaSpout running on Heron URL: https://github.com/apache/incubator-heron/issues/3103#issuecomment-471338534 If you want to use Apache Storm KafkaSpout with Heron, you can use ` <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-kafka-client</artifactId> <version>1.2.2</version> </dependency> ` But, there's a source file from Apache Storm is missing in the Heron Storm compatibility library which is required by the dependency above. You will need to manually copy `org.apache.storm.utils.Time` class from Apache Storm source tree into your project. We was using Heron 0.17.8 with storm-kafka-client 1.2.2 successfully, but recently rewrote a new one for Heron due to performance issue we found in storm-kafka-client.
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