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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13936) S3Guard: DynamoDB can go out of sync with S3AFileSystem::delete operation
Date Fri, 23 Dec 2016 00:13:58 GMT
Rajesh Balamohan created HADOOP-13936:
-----------------------------------------

             Summary: S3Guard: DynamoDB can go out of sync with S3AFileSystem::delete operation
                 Key: HADOOP-13936
                 URL: https://issues.apache.org/jira/browse/HADOOP-13936
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
            Reporter: Rajesh Balamohan
            Priority: Minor


As a part of {{S3AFileSystem.delete}} operation {{innerDelete}} is invoked, which deletes
keys from S3 in batches (default is 1000). But DynamoDB is updated only at the end of this
operation. This can cause issues when deleting large number of keys. 

E.g, it is possible to get exception after deleting 1000 keys and in such cases dynamoDB would
not be updated. This can cause DynamoDB to go out of sync. 



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