Druid Tranquilty - duplicate messages

tranquility 2 shutdown.log

2016-06-14 20:15:33,095 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:15:48,095 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:16:03,096 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:16:18,097 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:16:33,098 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:16:48,099 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:17:03,100 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:17:18,101 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 1ms.
2016-06-14 20:17:33,102 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
2016-06-14 20:17:48,103 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed 0 pending messages in 0ms and committed offsets in 0ms.
^C2016-06-14 20:18:00,685 [Thread-4] INFO  c.metamx.tranquility.kafka.KafkaMain - Initiating shutdown...
2016-06-14 20:18:00,685 [Thread-4] INFO  c.m.tranquility.kafka.KafkaConsumer - Shutting down - attempting to flush buffers and commit final offsets
2016-06-14 20:18:00,687 [Thread-4] INFO  k.c.ZookeeperConsumerConnector - [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e], ZKConsumerConnector shutting down
2016-06-14 20:18:00,701 [Thread-4] INFO  k.c.ZookeeperTopicEventWatcher - Shutting down topic event watcher.
2016-06-14 20:18:00,701 [Thread-4] INFO  k.consumer.ConsumerFetcherManager - [ConsumerFetcherManager-1465935243072] Stopping leader finder thread
2016-06-14 20:18:00,702 [Thread-4] INFO  k.c.ConsumerFetcherManager$LeaderFinderThread - [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e-leader-finder-thread], Shutting down
2016-06-14 20:18:00,703 [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e-leader-finder-thread] INFO  k.c.ConsumerFetcherManager$LeaderFinderThread - [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e-leader-finder-thread], Stopped 
2016-06-14 20:18:00,703 [Thread-4] INFO  k.c.ConsumerFetcherManager$LeaderFinderThread - [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e-leader-finder-thread], Shutdown completed
2016-06-14 20:18:00,703 [Thread-4] INFO  k.consumer.ConsumerFetcherManager - [ConsumerFetcherManager-1465935243072] Stopping all fetchers
2016-06-14 20:18:00,703 [Thread-4] INFO  k.consumer.ConsumerFetcherManager - [ConsumerFetcherManager-1465935243072] All connections stopped
2016-06-14 20:18:00,708 [ZkClient-EventThread-12-zoo-101:2181,zoo-102:2181zoo-103:2181/Kafka_v0_8_2_1] INFO  org.I0Itec.zkclient.ZkEventThread - Terminate ZkClient event thread.
2016-06-14 20:18:00,740 [Thread-4] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x254b8db89731214 closed
2016-06-14 20:18:00,741 [main-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down
2016-06-14 20:18:00,742 [Thread-4] INFO  k.c.ZookeeperConsumerConnector - [tranquility-kafka_IB-DPOLDRUGO-1465935242860-ce783c8e], ZKConsumerConnector shutdown completed in 54 ms
2016-06-14 20:18:00,742 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Commit thread interrupted.
2016-06-14 20:18:00,742 [Thread-4] INFO  c.m.tranquility.kafka.KafkaConsumer - Finished clean shutdown.