[jira] [Created] (HDFS-2943) Expose last checkpoint time and transaction stats as JMX metrics

[Aaron T. Myers (Created) (JIRA)]

Expose last checkpoint time and transaction stats as JMX metrics
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                 Key: HDFS-2943
                 URL: https://issues.apache.org/jira/browse/HDFS-2943
             Project: Hadoop HDFS
          Issue Type: New Feature
          Components: name-node
    Affects Versions: 0.23.1
            Reporter: Aaron T. Myers
            Assignee: Aaron T. Myers


I think we should expose at least the following:

* Last checkpoint time
* Transactions since last checkpoint
* Last written transaction

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