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https://issues.apache.org/jira/browse/HDFS-2306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13106883#comment-13106883
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Todd Lipcon commented on HDFS-2306:
-----------------------------------
- Not crazy about the new config name... "dfs.namenode.checkpoint.events" is
kind of vague. Perhaps dfs.namenode.checkpoint.history.retained ?
- missing license on CheckpointEvent.java
- does CheckpointEvent need to be public in order to work as part of JMX? I'm
not a JMX pro. If public, it should have audience/stability annotations
- we may want to expose getSyncTxId() instead of getLastWrittenTxId()
- typo "insce the last checkpoint" in NameNodeMXBean
- getRecentCheckpointEvents doesn't return a copy of the list, so the web page
may throw ConcurrentModificationException. Perhaps change
recentCheckpointEvents to be a CopyOnWriteArrayList? Or return a copy?
I'm still unclear on what the fields are inside CheckpointEvent... maybe we can
sync up offline to discuss.
> NameNode web UI should show information about recent checkpoints
> ----------------------------------------------------------------
>
> Key: HDFS-2306
> URL: https://issues.apache.org/jira/browse/HDFS-2306
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Fix For: 0.24.0
>
> Attachments: checkpoint-history.1.png, checkpoint-history.png,
> hdfs-2306.0.patch, hdfs-2306.1.patch
>
>
> It would be nice if the NN web UI showed the 2NN address, timestamp, number
> of edits, etc. of the last few checkpoints.
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