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https://issues.apache.org/jira/browse/STORM-1187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045589#comment-15045589
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ASF GitHub Bot commented on STORM-1187:
---------------------------------------

Github user d2r commented on the pull request:

    https://github.com/apache/storm/pull/900#issuecomment-162641124
  
    > @d2r It seems to be due to timing issues since the unit tests relied on 
Thread.sleep(). I've removed sleep and updated WaterMarkEventGeneratorTest to 
trigger manually.
    > 
    > Will also review other unit tests for similar issues.
    
    OK, sounds good to me.  Thanks.


> Support for late and out of order events in time based windows
> --------------------------------------------------------------
>
>                 Key: STORM-1187
>                 URL: https://issues.apache.org/jira/browse/STORM-1187
>             Project: Apache Storm
>          Issue Type: Sub-task
>            Reporter: Arun Mahadevan
>            Assignee: Arun Mahadevan
>
> Right now the time based windows uses the timestamp when the tuple is 
> received by the bolt. 
> However there are use cases where the tuples can be processed based on the 
> time when they are actually generated vs the time when they are received. So 
> we need to add support for processing events with a time lag and also have 
> some way to specify and read tuple timestamps.



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