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https://issues.apache.org/jira/browse/HDFS-16283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17566574#comment-17566574
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Ayush Saxena commented on HDFS-16283:
-------------------------------------
Committed to trunk.
Thanx Everyone!!!
> RBF: improve renewLease() to call only a specific NameNode rather than make
> fan-out calls
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-16283
> URL: https://issues.apache.org/jira/browse/HDFS-16283
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: rbf
> Reporter: Aihua Xu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
> Attachments: RBF_ improve renewLease() to call only a specific
> NameNode rather than make fan-out calls.pdf
>
> Time Spent: 6h 40m
> Remaining Estimate: 0h
>
> Currently renewLease() against a router will make fan-out to all the
> NameNodes. Since renewLease() call is so frequent and if one of the NameNodes
> are slow, then eventually the router queues are blocked by all renewLease()
> and cause router degradation.
> We will make a change in the client side to keep track of NameNode Id in
> additional to current fileId so routers understand which NameNodes the client
> is renewing lease against.
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