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https://issues.apache.org/jira/browse/HADOOP-12421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliott Clark updated HADOOP-12421:
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Attachment: HADOOP-12421-v1.patch
Patch that add 15% jitter (+/- 7.5%) along with a unit test for it.
> Add jitter to RetryInvocationHandler
> ------------------------------------
>
> Key: HADOOP-12421
> URL: https://issues.apache.org/jira/browse/HADOOP-12421
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.8.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Attachments: HADOOP-12421-v1.patch
>
>
> Calls to NN can become synchronized across a cluster during NN failover. This
> leads to a spike in requests until things recover. Making an already tricky
> time worse.
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