chetanmeh commented on issue #3921: Synchronize access to the KafkaConsumer. URL: https://github.com/apache/incubator-openwhisk/pull/3921#issuecomment-410218275 Sorry for the confusion. I was reading [0.11.0.1][1] code (yet not latest master) and that does not had locks but latest [2.0.0][2] code does have locks. So synchronized should fix that issue [1]: https://github.com/apache/kafka/blob/c2a0d5f9b1f45bf59552b360fc2b39884357a698/clients/src/main/java/org/apache/kafka/clients/consumer/KafkaConsumer.java#L1534 [2]: https://github.com/apache/kafka/blob/afe00effe2d79e89e159972cf1f5f7ffeb0c6e97/clients/src/main/java/org/apache/kafka/clients/consumer/KafkaConsumer.java#L2040
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