Arun Mahadevan created STORM-1176:
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             Summary: Checkpoint window evaluated state and use this to prune 
duplicate evaluations
                 Key: STORM-1176
                 URL: https://issues.apache.org/jira/browse/STORM-1176
             Project: Apache Storm
          Issue Type: Sub-task
            Reporter: Arun Mahadevan
            Assignee: Arun Mahadevan


Evaluated state of sliding/tumbling windows should be checkpointed periodically 
and on event replay during restart this info should be used to prune duplicate 
evaluations.



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