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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13904) DynamoDBMetadataStore to handle DDB throttling failures through retry policy
Date Wed, 14 Dec 2016 10:57:59 GMT
Steve Loughran created HADOOP-13904:
---------------------------------------

             Summary: DynamoDBMetadataStore to handle DDB throttling failures through retry
policy
                 Key: HADOOP-13904
                 URL: https://issues.apache.org/jira/browse/HADOOP-13904
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: HADOOP-13345
            Reporter: Steve Loughran


When you overload DDB, you get error messages warning of throttling, [as documented by AWS|http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.Errors.html#Programming.Errors.MessagesAndCodes]

Reduce load on DDB by doing a table lookup before the create, then, in table create/delete
operations and in get/put actions, recognise the error codes and retry using an appropriate
retry policy (exponential backoff + ultimate failure) 




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