Github user hmcl commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1679#discussion_r79574175
  
    --- Diff: 
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
 ---
    @@ -266,26 +266,32 @@ private void doSeekRetriableTopicPartitions() {
                 if (offsetAndMeta != null) {
                     kafkaConsumer.seek(rtp, offsetAndMeta.offset() + 1);  // 
seek to the next offset that is ready to commit in next commit cycle
                 } else {
    -                kafkaConsumer.seekToEnd(toArrayList(rtp));    // Seek to 
last committed offset
    +                kafkaConsumer.seek(rtp, acked.get(rtp).committedOffset + 
1);    // Seek to last committed offset
    --- End diff --
    
    @jfenc91 Why is seekToEnd not correct? 


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