Aihua Xu created HDFS-16283:
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Summary: 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: Aihua Xu
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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