[jira] [Created] (AVRO-2061) Improve Invalid File Format Error Message

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[jira] [Created] (AVRO-2061) Improve Invalid File Format Error Message

JIRA jira@apache.org
BELUGA BEHR created AVRO-2061:
---------------------------------

             Summary: Improve Invalid File Format Error Message
                 Key: AVRO-2061
                 URL: https://issues.apache.org/jira/browse/AVRO-2061
             Project: Avro
          Issue Type: Improvement
          Components: java
    Affects Versions: 1.8.2, 1.9.0
            Reporter: BELUGA BEHR
            Priority: Trivial


{code:title=org.apache.avro.file.DataFileStream<D>}
    try {
      vin.readFixed(magic);                         // read magic
    } catch (IOException e) {
      throw new IOException("Not a data file.", e);
    }
    if (!Arrays.equals(DataFileConstants.MAGIC, magic))
      throw new IOException("Not a data file.");
{code}

Please consider improving the error message here.  I just saw a MapReduce job fail with an IOException with the message "Not a data file."  There was definitely data files in the input directory, however, they were not Avro files. It would have been much more helpful if it told me that.



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