epugh opened a new pull request #2356:
URL: https://github.com/apache/lucene-solr/pull/2356


   # Description
   
   Export tool says it uses json, but it's actually a json lines format.   It 
ignores anonymous and nested docs.
   
   # Solution
   
   * Tweaked the writer to properly handle anonymous and regular nested docs 
when exporting data.
   * Renamed the existing `json` format to `jsonl`, and introduced a proper 
`json` format.
   * Introduce explicit DocSinks per format, `json`, `jsonl`, and `javabin`.
   
   Now, with the `json` format you can export and then reimport the Solr docs, 
including with child docs.
   
   # Tests
   
   I've added a new `TestExportToolWithNestedDocs`, and extended the existing 
`TestExportTool` tests.  The setup for the tests was quite different, so I 
didn't make them all one file.
   
   # Checklist
   
   Please review the following and check all that apply:
   
   - [ X] I have reviewed the guidelines for [How to 
Contribute](https://wiki.apache.org/solr/HowToContribute) and my code conforms 
to the standards described there to the best of my ability.
   - [ X] I have created a Jira issue and added the issue ID to my pull request 
title.
   - [ X] I have given Solr maintainers 
[access](https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork)
 to contribute to my PR branch. (optional but recommended)
   - [ X] I have developed this patch against the `master` branch.
   - [ ] I have run `./gradlew check`.
   - [ X] I have added tests for my changes.
   - [ ] I have added documentation for the [Ref 
Guide](https://github.com/apache/lucene-solr/tree/master/solr/solr-ref-guide) 
(for Solr changes only).
   


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