Review Request: FLUME-1600: FileChannel metadata files should be written to a temp file and then moved over existing files

[Brock Noland]

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https://reviews.apache.org/r/7235/
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Review request for Flume.


Description
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Implements FLUME-1600 via static method in the LogFileV3 class.


This addresses bug FLUME-1600.
    https://issues.apache.org/jira/browse/FLUME-1600


Diffs
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flume-ng-channels/flume-file-channel/src/main/java/org/apache/flume/channel/file/LogFileV3.java
 5de6e82 
  
flume-ng-channels/flume-file-channel/src/test/java/org/apache/flume/channel/file/TestLogFile.java
 9fc834e 

Diff: https://reviews.apache.org/r/7235/diff/


Testing
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Unit test added and unit tests pass.


Thanks,

Brock Noland