Generalize the HAServiceProtocol interface
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Key: HDFS-2354
URL: https://issues.apache.org/jira/browse/HDFS-2354
Project: Hadoop HDFS
Issue Type: Sub-task
Components: name-node
Reporter: Justin Joseph
Assignee: Justin Joseph
This JIRA intends to revisit the patches committed for HADOOP-7455 and
HDFS-1974 & to provide more generic interfaces which allows alternative HA
implementations to co-exist complying with HAServiceProtocol.
Some of the considerations are
1) Support life cycle methods (start*() and stop() APIs) in HAServiceProtocol
2) Support custom states in HAServiceProtocol
3) As per the patch submitted for HDFS-1974, Namenode implements HAService
interface. This needs to be reconsidered.
I will elaborate on these points, in the form of comments below.
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