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Posted to issues@storm.apache.org by "Arun Mahadevan (JIRA)" <ji...@apache.org> on 2018/09/12 22:36:00 UTC

[jira] [Created] (STORM-3222) Fix KafkaSpout internals to use LinkedList instead of ArrayList

Arun Mahadevan created STORM-3222:
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             Summary: Fix KafkaSpout internals to use LinkedList instead of ArrayList
                 Key: STORM-3222
                 URL: https://issues.apache.org/jira/browse/STORM-3222
             Project: Apache Storm
          Issue Type: Improvement
            Reporter: Arun Mahadevan
            Assignee: Arun Mahadevan


KafkaSpout internally maintains a waitingToEmit list per topic partition and keeps removing the first item to emit during each nextTuple. The implementation uses an ArrayList which results in un-necessary traversal and copy for each tuple.

Also I am not sure why the nextTuple only emits a single tuple wheres ideally it should emit whatever it can emit in a single nextTuple call which is more efficient.  However the logic appears too complicated to refactor.



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