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https://issues.apache.org/jira/browse/DRILL-2383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355407#comment-14355407
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Chris Westin commented on DRILL-2383:
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I think we might also need DRILL-2275 in order to check on the drillbits' state
after these test cases.
> add exception injections for testing drillbit stability
> -------------------------------------------------------
>
> Key: DRILL-2383
> URL: https://issues.apache.org/jira/browse/DRILL-2383
> Project: Apache Drill
> Issue Type: New Feature
> Components: Execution - Flow
> Reporter: Chris Westin
> Assignee: Sudheesh Katkam
>
> Use the exception injection mechanism to add exception injections to test a
> variety of distributed failure scenarios.
> Here are some scenarios we've worked out before:
> 1. Cancellation:
> TC1: cancel before any result set is returned
> TC2: cancel in the middle of fetching result set
> TC3: cancel after all result set are produced but not all are fetched
> TC4: cancel after everything is completed and fetched
> As test setup, we need:
> - query dataset large enough to be sent to different drillbits, e.g., TPCH
> 100
> - queries that force multiple drillbits to work on them; e.g., count ...
> group by
> 2. Completed (in each case check all drillbits are still up and running):
> TC1: success
> TC2: failed query - before query is executed - while sql parsing
> TC3: failed query - before query is executed - while sending fragments to
> other drillbits for execution
> TC4: failed query - during query execution
> It is currently not possible to create a scenario in which a query may hang.
> To check all drillbits up and running and in a clean state, run:
> select count(*) from sys.drillbits;
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