[jira] [Created] (SPARK-18337) Memory Sink should be able to recover from checkpoints in Complete OutputMode

["Burak Yavuz (JIRA)" <ji...@apache.org>]

Burak Yavuz created SPARK-18337:
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             Summary: Memory Sink should be able to recover from checkpoints in Complete OutputMode
                 Key: SPARK-18337
                 URL: https://issues.apache.org/jira/browse/SPARK-18337
             Project: Spark
          Issue Type: Improvement
          Components: Structured Streaming
    Affects Versions: 2.0.1
            Reporter: Burak Yavuz


Memory sinks are not meant to be fault tolerant, but there are certain cases, where it would be nice that it can recover from checkpoints. In cases where you may use a scalable StateStore in StructuredStreaming (when you have an aggregation), and you add a filter based on a key or value in your state, it's nice to be able to continue from where you left off after failures.

For correctness reasons, the output will ONLY be correct in Complete mode, so we could support that.



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