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

    https://github.com/apache/storm/pull/1825#discussion_r92845884
  
    --- Diff: 
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
 ---
    @@ -236,6 +257,35 @@ private boolean poll() {
             return poll;
         }
     
    +    private void refreshPartitionIfNeeded() {
    +        if (!manualPartitionAssignment || 
!partitionRefreshTimer.isExpiredResetOnTrue()) return;
    +        doRefreshPartitions();
    +    }
    +
    +    private void doRefreshPartitions() {
    +        KafkaSpoutStreamsNamedTopics streams = 
KafkaSpoutStreamsNamedTopics.class.cast(kafkaSpoutStreams);
    --- End diff --
    
    I think you can still support wildcard topics via KafkaConsumer.listTopics. 
If it isn't added in this PR, we should make an issue for it at least.
    
    Also nit: Why are you using class.cast instead of C-style cast?


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