Yang Yun created HDFS-15280:
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Summary: Datanode delay random time to report block if
BlockManager is busy
Key: HDFS-15280
URL: https://issues.apache.org/jira/browse/HDFS-15280
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Yang Yun
Assignee: Yang Yun
When many Datanodes are reporting at the same time, the cluster may respond
slowly. Limit the concurrent reporting number. If BlockManager is busy, it
rejects new request and the Datanode delay a few random time to report.
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