steveloughran commented on issue #991: HADOOP-16382: clock skew can cause 
S3Guard to think object metadata is out of date
URL: https://github.com/apache/hadoop/pull/991#issuecomment-504087493
 
 
   Gabor has explained to me how I am wrong :)
   
   We shouldn't be mixing s3A timestamps with the DDB last updated field. The 
behaviour I was seeing was correct in that this was correcting the 
S3AFileStatus modtime from the locally created timestamp to the real store value
   
   However, we should be forcing this update whenever there is a mismatch, 
rather than just when the store time is > the local

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