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https://issues.apache.org/jira/browse/HDFS-5076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HDFS-5076:
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Attachment: HDFS-5076.001.patch
Initial patch for review. Besides the two tx ids mentioned in the description,
the patch also adds a servlet on Journal Node to allow users to learn if the JN
has been successfully formatted. We can also move this to a separate jira if
necessary.
> 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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