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https://issues.apache.org/jira/browse/HDFS-13488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16450287#comment-16450287
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Íñigo Goiri commented on HDFS-13488:
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[~linyiqun], the tune between ArrayBlockingQueue and LinkedBlockingQueue is
basically the trigger for overloading.
ArrayBlockingQueue will reject once we pass the capacity and
LinkedBlockingQueue should be able to grow non-stop.
We could set the ArrayBlockingQueue capacity limit to something very large like
Integer.MAX_VALUE but it looks cleaner with the linked approach.
> RBF: Reject requests when a Router is overloaded
> ------------------------------------------------
>
> Key: HDFS-13488
> URL: https://issues.apache.org/jira/browse/HDFS-13488
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-13488.000.patch, HDFS-13488.001.patch
>
>
> A Router might be overloaded when handling special cases (e.g. a slow
> subcluster). The Router could reject the requests and the client could try
> with another Router. We should leverage the Standby mechanism for this.
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