htran1 opened a new pull request #2602: [GOBBLIN-736] Skip flush and control 
message handlers on closed write…
URL: https://github.com/apache/incubator-gobblin/pull/2602
 
 
   …rs in the CloseOnFlushWriterWrapper
   
   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. For example, "[GOBBLIN-XXX] My Gobblin PR"
       - https://issues.apache.org/jira/browse/GOBBLIN-736
   
   
   ### Description
   - [X] Here are some details about my PR, including screenshots (if 
applicable):
   The CloseOnFlushWriterWrapper calls operations on the underlying handler to 
handle flush and metadata update control messages. These operations should not 
be done on a closed writer since the underlying writer may raise errors for 
closed objects. Added early returns when a closed writer is detected.
   
   ### Tests
   - [X] My PR adds the following unit tests __OR__ does not need testing for 
this extremely good reason:
   Added test cases to CloseOnFlushWriterWrapperTest.
   
   ### 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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