Chris Nauroth created HDFS-9239:
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Summary: DataNode Lifeline Protocol: an alternative protocol for
reporting DataNode liveness
Key: HDFS-9239
URL: https://issues.apache.org/jira/browse/HDFS-9239
Project: Hadoop HDFS
Issue Type: New Feature
Components: datanode, namenode
Reporter: Chris Nauroth
Assignee: Chris Nauroth
Attachments: DataNode-Lifeline-Protocol.pdf
This issue proposes introduction of a new feature: the DataNode Lifeline
Protocol. This is an RPC protocol that is responsible for reporting liveness
and basic health information about a DataNode to a NameNode. Compared to the
existing heartbeat messages, it is lightweight and not prone to resource
contention problems that can harm accurate tracking of DataNode liveness
currently. The attached design document contains more details.
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