Jing Zhao created HDFS-5076:
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Summary: Create http servlets to enable querying NN's last applied
transaction ID and most recent checkpoint's transaction ID
Key: HDFS-5076
URL: https://issues.apache.org/jira/browse/HDFS-5076
Project: Hadoop HDFS
Issue Type: New Feature
Affects Versions: 3.0.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Minor
Currently NameNode already provides RPC calls to get its last applied
transaction ID and most recent checkpoint's transaction ID. It can be helpful
to provide servlets to enable querying these information through http, so that
administrators and applications like Ambari can easily decide if a forced
checkpoint by calling saveNamespace is necessary.
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