[jira] [Created] (SPARK-14833) Refactor StreamTests to test for source fault-tolerance correctly.

["Tathagata Das (JIRA)" <ji...@apache.org>]

Tathagata Das created SPARK-14833:
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             Summary: Refactor StreamTests to test for source fault-tolerance correctly.
                 Key: SPARK-14833
                 URL: https://issues.apache.org/jira/browse/SPARK-14833
             Project: Spark
          Issue Type: Sub-task
            Reporter: Tathagata Das
            Assignee: Tathagata Das


Current StreamTest allows testing of a streaming Dataset generated explicitly wraps a source. This is different from the actual production code path where the source object is dynamically created through a DataSource object every time a query is started. So all the fault-tolerance testing in FileSourceSuite and FileSourceStressSuite is not really testing the actual code path as they are just reusing the FileStreamSource object. 

Instead of maintaining a mapping of source --> expected offset in StreamTest (which requires reuse of source object), it should maintain a mapping of source index --> offset, so that it is independent of the source object. 



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