[jira] [Created] (HDFS-7923) The DataNodes should rate-limit their full block reports by asking the NN on heartbeat messages

["Colin Patrick McCabe (JIRA)" <ji...@apache.org>]

Colin Patrick McCabe created HDFS-7923:
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             Summary: The DataNodes should rate-limit their full block reports by asking the NN on heartbeat messages
                 Key: HDFS-7923
                 URL: https://issues.apache.org/jira/browse/HDFS-7923
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Colin Patrick McCabe
            Assignee: Charles Lamb


The DataNodes should rate-limit their full block reports.  They can do this by first sending a heartbeat message to the NN with an optional boolean set which requests permission to send a full block report.  If the NN responds with another optional boolean set, the DN will send an FBR... if not, it will wait until later.  This can be done compatibly with optional fields.



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