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https://issues.apache.org/jira/browse/HADOOP-16823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-16823:
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Priority: Major (was: Minor)
> Large DeleteObject requests are their own Thundering Herd
> ---------------------------------------------------------
>
> Key: HADOOP-16823
> URL: https://issues.apache.org/jira/browse/HADOOP-16823
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.2.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Fix For: 3.3.0
>
>
> Currently AWS S3 throttling is initially handled in the AWS SDK, only
> reaching the S3 client code after it has given up.
> This means we don't always directly observe when throttling is taking place.
> Proposed:
> * disable throttling retries in the AWS client library
> * add a quantile for the S3 throttle events, as DDB has
> * isolate counters of s3 and DDB throttle events to classify issues better
> Because we are taking over the AWS retries, we will need to expand the
> initial delay en retries and the number of retries we should support before
> giving up.
> Also: should we log throttling events? It could be useful but there is a risk
> of logs overloading especially if many threads in the same process were
> triggering the problem.
> Proposed: log at debug.
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