[jira] [Created] (SPARK-19721) Good error message for version mismatch in log files

["Michael Armbrust (JIRA)" <ji...@apache.org>]

Michael Armbrust created SPARK-19721:
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             Summary: Good error message for version mismatch in log files
                 Key: SPARK-19721
                 URL: https://issues.apache.org/jira/browse/SPARK-19721
             Project: Spark
          Issue Type: Bug
          Components: Structured Streaming
    Affects Versions: 2.1.0
            Reporter: Michael Armbrust
            Priority: Blocker


There are several places where we write out version identifiers in various logs for structured streaming (usually {{v1}}).  However, in the places where we check for this, we throw a confusing error message.  Instead, we should do the following:
 - Find all of the places where we do this kind of check.
 - for {{vN}} where {{n>1}} say "UnsupportedLogFormat: The file {{path}} was produced by a newer version of Spark and cannot be read by this version.  Please upgrade"
 - for anything else throw an error saying the file is malformed.



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