HA: Datanode fencing mechanism
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Key: HDFS-1972
URL: https://issues.apache.org/jira/browse/HDFS-1972
Project: Hadoop HDFS
Issue Type: Sub-task
Components: data-node, name-node
Reporter: Suresh Srinivas
Assignee: Suresh Srinivas
In high availability setup, with an active and standby namenode, there is a
possibility of two namenodes sending commands to the datanode. The datanode
must honor commands from only the active namenode and reject the commands from
standby, to prevent corruption. This invariant must be complied with during
fail over and other states such as split brain. This jira addresses issues
related to this, design of the solution and implementation.
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