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https://issues.apache.org/jira/browse/HDFS-5076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737483#comment-13737483
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Suresh Srinivas commented on HDFS-5076:
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Instead of new servlets, could this be done using the existing NamenodeMxBean,
which is already exposed over http? Similarly, we could also add MxBean
interface to JournalNode?
> 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
> Attachments: HDFS-5076.001.patch
>
>
> 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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