Any plans to provide 0.20.x patch for HADOOP-4584 - Slow generation of Block Report at DataNode causes delay of sending heartbeat to NameNode

[Jon Graham]

Hello Everyone,

Is there a patch available for HADOOP-4584 that can be used on 0.20.2?

Link https://issues.apache.org/jira/browse/HADOOP-4584 seems to indicate
that a patch is available for 0.21 version but this
version is not release yet.

Block reports are taking several minutes on our cluster and this causes time
out conditions and lots of retry conditions.

Thanks for your help,
Jon