[SPARK-14833] Refactor StreamTests to test for source fault-tolerance correctly.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Structured Streaming
• Assignee: Tathagata Das
• Reporter: Tathagata Das
• Created: 22/Apr/16 00:58
• Updated: 01/Nov/16 22:15
• Resolved: 24/Apr/16 04:53

Description

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.

Issue Links

• links to: [Github] Pull Request #12592 (tdas)