zxcware opened a new pull request #3122:
URL: https://github.com/apache/incubator-gobblin/pull/3122


   Dear Gobblin maintainers,
   
   Please accept this PR. I understand that it will not be reviewed until I 
have checked off all the steps below!
   
   
   ### JIRA
   - [x] My PR addresses the following [Gobblin 
JIRA](https://issues.apache.org/jira/browse/GOBBLIN/) issues and references 
them in the PR title.
       - https://issues.apache.org/jira/browse/GOBBLIN-1283
   
   
   ### Description
   - [x] Here are some details about my PR:
    - It looks like when a nested child schema is present and referenced 
multiple times in the main schema, calling `convertFieldToSchemaWithProps` it 
over the nested child schema will trigger schema redefine parse exception.
    - We found `AvroFlattener` will keep the schema properties. There is no 
need to copy them from field properties.
   
   ### Tests
   - [x] My PR uses the following unit tests:
    - The changes are covered by `HiveAvroORCQueryGeneratorTest`
   
   ### Commits
   - [x] My commits all reference JIRA issues in their subject lines, and I 
have squashed multiple commits if they address the same issue. In addition, my 
commits follow the guidelines from "[How to write a good git commit 
message](http://chris.beams.io/posts/git-commit/)":
       1. Subject is separated from body by a blank line
       2. Subject is limited to 50 characters
       3. Subject does not end with a period
       4. Subject uses the imperative mood ("add", not "adding")
       5. Body wraps at 72 characters
       6. Body explains "what" and "why", not "how"
   
   


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