James Sirota reassigned METRON-227:

    Assignee: James Sirota  (was: Ajay Yadav)

> Add Time-Based Flushing to Writer Bolt
> --------------------------------------
>                 Key: METRON-227
>                 URL: https://issues.apache.org/jira/browse/METRON-227
>             Project: Metron
>          Issue Type: Bug
>            Reporter: Domenic Puzio
>            Assignee: James Sirota
> We need to change the BulkMessageWriterBolt and BulkWriterComponent to use 
> time-based flushing when writing data to Elasticsearch or Solr.
> Currently, we set a batch size, and the Writer waits for that number of 
> tuples to build up; however, Storm has a timeout value that prevents it from 
> waiting for too long. If the Writer does not get the batch size before the 
> timeout, then it recycles the tuples through the topology. In addition, Storm 
> only allows so many pending messages that have not been acked - if too many 
> messages are waiting for the bulk Writer, then it will recycle them through 
> the topology. This is not desired behavior and directly impacts the 
> performance of this Writer. We would like to be able to specify a unit of 
> time for which the topology would flush, writing the data it's currently 
> holding to Elasticsearch or Solr even if the batch size is not met.

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