[jira] [Created] (DRILL-7733) Use streaming for REST JSON queries

["Paul Rogers (Jira)" <ji...@apache.org>]

Paul Rogers created DRILL-7733:
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             Summary: Use streaming for REST JSON queries
                 Key: DRILL-7733
                 URL: https://issues.apache.org/jira/browse/DRILL-7733
             Project: Apache Drill
          Issue Type: Improvement
    Affects Versions: 1.17.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
             Fix For: 1.18.0


Several uses on the user and dev mail lists have complained about the memory overhead when running a REST JSON query: {{http:://node:8047/query.json}}. The current implementation buffers the entire result set in memory, then lets Jersey/Jetty convert the results to JSON. The result is very heavy heap use for larger query result sets.

This ticket requests a change to use streaming. As each batch arrives at the Screen operator, convert that batch to JSON and directly stream the results to the client network connection, much as is done for the native client connection.

For backward compatibility, the form of the JSON must be the same as the current API.



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