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Posted to issues@storm.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/09/12 22:40:00 UTC

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

     [ https://issues.apache.org/jira/browse/STORM-3222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated STORM-3222:
----------------------------------
    Labels: pull-request-available  (was: )

> 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
>            Priority: Minor
>              Labels: pull-request-available
>
> 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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