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https://issues.apache.org/jira/browse/HADOOP-13904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15847145#comment-15847145
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Steve Loughran commented on HADOOP-13904:
-----------------------------------------
LGTM, almost ready to go in
# {{clearMetadataStore(ms, count);}} may need to go into a finally clause of
{{testMoves()}}
# how long do these tests take —and to they work in parallel with anything
else? If they are slow, they need to become a scale test, and if they don't
parallelize, the mvn build needs to explicitly put them in the serial bit of a
parallel test run
> 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
> Assignee: Aaron Fabbri
> Attachments: HADOOP-13904-HADOOP-13345.001.patch
>
>
> 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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