gerlowskija opened a new pull request #1741:
URL: https://github.com/apache/lucene-solr/pull/1741


   # Description
   
   Prior to this commit, the wrapup logic at the end of
   DocBuilder.execute() closed out a series of DIH objects, but did so
   in a way that an exception closing any of them resulted in the remainder
   staying open.  This is especially problematic since Writer.close()
   throws exceptions that DIH uses to determine the success/failure of the
   run.
   
   In practice this caused network errors sending DIH data to other Solr
   nodes to result in leaked JDBC connections.
   
   # Solution
   
   This PR changes DocBuilder's termination logic to handle exceptions
   more gracefully, ensuring that errors closing a DIHWriter (for example)
   don't prevent the closure of entity-processor and DataSource objects.
   
   # Tests
   
   None
   
   # 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.
   - [x] I have run `ant precommit` and the appropriate test suite.
   - [ ] 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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